bluuebunny/crossref_metadata_2025 huggingface dataset:
Quality Cost Forecast of the Construction Enterprise Based on SVR Model
Authors: Niu Jian Guang , Gao Chun Yan , Xing Xiu Qing
Published: November 2012

This paper established a relatively good index system of quality cost projections. The quality cost of construction enterprise is predicted by introducing a new mathematical model — Support Vector Regression Model (SVR). SVR is one of the best methods on dealing with small samples, avoiding the defects of neural network that is easy to fall into local minimum, lower accuracy rate, and it verified Unascertained-SVR model is feasible and good accuracy by example.
Construction of the Influence Relationship Model between the Construction Project Safety System and the City Public Safety System and Analysis of the Influence Types
Authors: Yan Xiao Li
Published: November 2012

This article makes research on the relationship between the construction project safety and the city public safety. Firstly it constructs the influence relationship model between the construction project safety and city public safety, including identify the interrelated factors of the two systems of construction project safety and the city public safety and construct the influence Relationship Model between the two systems. Secondly, this paper concludes the types of the serious city public problems that are caused by construction project accidents with specific examples, then it gives some deep-seated reasons for such accidents in the background of Chinese construction industry based on the investigation result.
Study on Scenario Analysis Method Based Safety Pre-Warming of Large Construction Engineering
Authors: Chang Chun Guang , Jia Zhao Nan , Liu Ya Chen , Luan Lan
Published: November 2012

For large construction engineering, to perform safety pre-warming more efficiently, scenario analysis method (SAM) is studied for safety pre-warming of large construction engineering (SPLCE). Implement flow framework of SAM is established, the key cycles of SAM are discussed. To validate the validity of SAM for SPLCE, some practical instances of SPLCE are abstracted so as to generated application and testing sample. Comparing with whole index evaluating method (WIEM), under the condition of considering only limited key driven forces and some normal indexes, the result by SAM are almost the same with that by WIEM. SAM improves the efficiency of SPLCE, and it is fit for solving complex predicting, analyzing and evaluating problems such as SPLCE.
Business Intelligence in Construction: A Review
Authors: Shi Hao , Peng Cong , Xu Mao Zeng
Published: November 2012

Business Intelligence (BI) has been viewed as sets of powerful tools and approaches to improving business executive decision-making, business operations, and increasing the value of the enterprise. This literature review presents the development of business Intelligence in recent years. Architecture, technologies, performance evaluation and applications four aspects are discussed to illustrate the BI used technology and the future trend. It presents how to improve the BI efficiency and what method is adopted for enterprise to solve the problems which they encounter.
Experimental Research on Tailings Briquetting for Filling Mining Subsidence Area in Jinshandian Iron Mine
Authors: Du Cui Feng , Zuo Ying , Li Hao Feng , Wang Shui Ping
Published: November 2012

This paper analyzed the feasibility of tailings briquetting for filling mining subsidence area based on the actual conditions. In the experiment, the diameter 25mm filling balls were made of slurry of Jinshandian tailings and cement, the cement tailing ratio was 1:4, the concentration of slurry was respectively 68%, 70%, 72%, 75%, and the falling strength, the compressive strength, the powder ratio about the filling balls were tested. The results showed that the falling strength was more than 50 times/A; the compressive strength was 5.23~21.12MPa; the powder ratio was 0.69%~10.52%. The results of the PFC2D numerical simulation showed that the maximum stress among the filling balls was 3.39MPa during the ore drawing process. The stress was lower than the minimum compressive strength of 5.23MPa, and the corresponding powder ratio was less than 8%. It has been concluded that the filling-body is able to meet the requirement of the strength and the powder ratio in the mine filling. The filling-body can be applied to backfilling subsidence area.
Triaxial Test of Unsaturated Clay and the Engineering Application at the Naji Reservoir in Guangxi Province
Authors: Ma Dian Guang , Zhang Zhi Kai , Wang Yuan Zhan
Published: November 2012

Torrential or atomized rain is one of the key factors that lead to slope deformation and failure. With rain water infiltration, the pore pressure increases and the matric suction decreases even lose, which lead to the soil shear strength sharply reduced and the slope destabilized. This paper selects the in-situ red clay of the Naji reservoir in Guangxi province as research object and investigates the stress-strain characteristics of undisturbed unsaturated red clay under different matric suction conditions by the triaxial test. The numerical verification of test results is conducted by finite element software ABAQUS, using Duncan-Chang model and Mohr-Coulomb model respectively. Comparing with the Duncan-Chang model, Mohr-Coulomb model can reflect the stress-strain behavior of red clay better. And the slope stability of the project in rainfall condition is analyzed by numerical model, which would offer references for the implementation of the revetment engineering.
Unconfined Compression Strength of Tianluoshan Relic Soils Solidified by Methyl Acrylic Acid Resin
Authors: Chai Xin Jun , He Chun Feng , Yu Jie Wen , Gao Yan Sheng , Rao Chen Xi
Published: November 2012

The consolidation and conservation of earthen sites is one of the difficult problems at home and abroad. Tianluoshan relic sites is a typical earthen sites located at humid circumstances. For public exhibitions and research purposes, a few chemical grouts were recommended for solidification and conservation of the excavated historical heritage sites. In this paper, the potential application of methyl acrylic acid resin for strengthening Tianluoshan relic soils were evaluated by a series of unconfined compression tests considering the influence of curing condition, curing time, and water content. The results showed that methyl acrylic acid resin can effectively improve the strength of Tianluoshan relic soils.
Research on Mechanism of Consolidating the Saturated Soft Clay with the Application of Pile-Supported Composite Foundation
Authors: Zhang Zhao Hua
Published: November 2012

In order to reduce both uneven settlements and construction duration, researches on pile-supported composite foundation of highway were carried out. When the groundfill is higher than the critical height（1.35 times space between piles）, a complete geostatic arch is formed in the pile-supported composite foundation, which could significantly reduce the uneven settlement. Grids installed at the bottom of embankment could markedly reduce the side displacement and increase the stability of embankment, multilayer grids with layout of loose on the top and dense at the bottom prefer to single layer grids. Plastic drainage board makes up well-functioned drainage system, which can shorten the dispersal time of pore water pressure and accelerate the consolidation of soft soil to shorten the construction duration.
The Saturated - Unsaturated Seepage Analysis of Hualianshu Landslide on the Condition of Rainfall
Authors: Hu Yu , Feng Qiang
Published: November 2012

With the saturated - unsaturated seepage theory, Hualianshu landslide is seepage numerical simulated by the finite element method .The changes of Hualianshu landslide seepage are subject to the impact of rainfall and reservoir water level's changes.The formation and variation of the slope seepage field under rainfall infiltration have been come to, providing a basis for analysis of slope stability and landslide prediction.
Research and Application on Laws of Consolidation Time Calculate in Saturated Soft Clay Soil by Using Vacuum-Surcharge Combined Preloading Method
Authors: Xu Ping Bo , Lu Shu Qiang , Zhang Ji Tao
Published: November 2012

Vacuum-surcharge combined preloading method have been become the most commonly used method on the dredger fill and saturated soft clay soil consolidation beside the coast. The long time of consolidation is one of this method’s most characteristics, as we always think that 3 months is the academic time. In fact, we always can’t accomplish the consolidation of saturated soft clay soil by using vacuum-surcharge combined preloading method in 3 months because of the complex nature of the soil horizon and the effects of the construction technology. The main mission of the article is to supply a substantial time and a reliable basis that are needed by the vacuum-surcharge combined preloading method and the construction period. The main data sources are come from the ground treatment project of a cogeneration power plant in Zhuhai Guangzhou. We adopt the exponential curve fitting method and the method of Asaoka to count the degree of consolidation of the saturated soft clay soil.
Pore Pressure Build-up of Silt Soft Clay under Dynamic Loading at Zhoushan Islands
Authors: Shi Qian , Zhou Kui , Li Qiang
Published: November 2012

The mechanism of dynamic tri-axial test is introduced in this paper and the dynamic responses of silt soft clay at Zhoushan are studied using a dynamic tri-axial test system. The laws of pore pressure build-up of the silt clay are obtained which are affected by the consolidation pressure and dynamic load. The greater the consolidation pressure and the dynamic loading is, the more the build-up of pore pressure is. However, the dynamic load has minor effect on pore pressure build-up under the anisotropic consolidation.
Comparative Analysis of Single Belled Wedge Pile with Conventional Piles under Lateral Load
Authors: Kong Gang Qiang , Tan Xian Liang , Deng Zong Wei , Jin Zhi Ren
Published: November 2012

A new belled wedge pile, which can improves the friction of pile shaft, tip resistance and reduce the influence of negative skin friction, was developed. The analysis model of single belled wedge pile embedded on soft soils was built by p-y curves method via LPILE software, models of conventional belled pile, tapered pile, and uniform section pile with the same volumes were also built for comparative analyze. The performances on load deflection curves, and bending moment distributions for these four pile types were comparative analyzed and discussed. Then the parameter studies of single belled wedge pile are carried out. The results show that belled wedge pile is one of cost-effective piles, which can improve lateral bearing capacities effectively.
Analysis of the Shear Stress on Prestressed Anchor in Rock Mass
Authors: Pan Yuan Lian , Chen Ying Hui , Ma Yan Chao , Chen Wei Ling , Sheng Guang Qi
Published: November 2012

The shear stress of prestressed anchor cable is unevenly distributed along anchoring length.Based on the load transfer behaviors of bolt,the solutions for distribution of the shear stress in pre-stressed cables are derived.And the mechanical characteristics are discussed for the influences on the shear stress distribution.The calculated values are compared with the results of the filed tests,and good agreements are obtained.
Geosynthetic-Encased Sand Column Behavior under Triaxial Test Simulation
Authors: Hong Yung Shan , Wu Cho Sen , Sun Chiang Sen
Published: November 2012

Encasing a cylindrical granular column with tensile resistant material is proven an effective practice to improve granular column strength. Laboratory triaxial compression tests were conducted on encased granular columns to study the tensile resistant material reinforcing effects. This study explores the behavior of geosynthetic-encased sand columns using a converted approach to reduce laborious efforts. The encased column behavior is simulated by applying persistently increased chamber pressure to unreinforced sand column specimens. Three column specimen diameters, 5, 7 and 10 cm, were employed to study the scale effect. The test results indicate that the converted approach simulates larger diameter encased column well.
Test Research on the Basic Properties of Soft Soil along the Yangtze River Anhui Province
Authors: Wei Song , Zhang Qing Yu , Liu Jian Guo , Xu Liang Hui , Chen Qing
Published: November 2012

The general soft soil widely exists in coastal, riverside and lakeside areas. Large area along the Yangtze River in Anhui Province is also the distribution of soft soil. The existence of soft soil has some degree effect on the project construction. According to the laboratory tests, the basic properties of the soft soil in these areas were researched. Based on test results, and compared with the soft soil of other areas, results show that the soft soil of Anhui along the Yangtze River has its own special nature. It include that, compared with other areas soft soil, the soil void ratio and compression coefficient are a little smaller; the consolidation coefficient, permeability coefficient and shear strength parameters are a little bigger; the silt content is above normal. The results and further understanding of soft soil basic nature may have certain guiding significance to construction projects along the Yangtze River region.
Finite Element Analysis of the Effect of Core Pile in Combined Composite Foundation
Authors: Liu Shao Dong , Guo Wei , Zheng Xin
Published: November 2012

Combined composite foundation has been widely used in actual projects, but its working behaviors need to be studied further. By establishing finite element model, the effect of the core pile was researched. Analysis shows that, the diameter and the length of core pile affect the bearing capacity of combined composite foundation significantly. There is an optimal value of the length and the diameter of core pile, which can make the foundation generate maximum carrying capacity. With the increase of core pile length, the depth of neutral point increased.
Fracture Characteristics of High Pressure Granite under Unloading Condition
Authors: Lv Ying Hui , Feng Xia Ting , Yan Bin
Published: November 2012

it is already confirmed that the rock mechanical characteristics under unloading condition differ from those under load condition, and the excavation process should be considered to be a typical kind of unloading mechanical behavior. As thus, a series of representative unloading tests and shear strength tests about unloading cracks are performed on hard granite samples from the underground workshop excavation zone in Dagangshan hydropower station in western China, where the surrounding rock is affected by high geo-stress. Based on the tests results, some significant theory research is made.
3D Continuum Model for Nonlinear Dynamic Analysis of Wall-Frame Structures with Uniform Stiffness and Yield Strength
Authors: Huang Kai , Zou Li Hua , Chen Jian Mei
Published: November 2012

A simplified 3D multi-degree-of-freedom (MDOF) model for estimation of seismic response of reinforced concrete wall-frame structures with uniform stiffness along the height are proposed in this paper. This model is aimed at reducing the computation demand in the nonlinear response history analysis (RHA). By employing the continuum technique for the structure and adopting the bilinear hysteretic model for material properties, the procedure for the development of a simplified MDOF model, called continuum MDOF model is developed. The proposed continuum MDOF model is shown to provide a simple and efficient for computation of nonlinear response of tall wall-frame structures.
Research on Mechanical Analysis of Bulk Grain Storehouse Columns by Different Span and Different Height of Grain
Authors: Huang Li , Zhang Hua
Published: November 2012

Aiming at the different spans of 24m, 27m and 30m for the bulk grain storehouse, the mechanical calculations of the bent frame columns with different grain height of 4.5m, 5.0m and 5.5m were respectively performed. The results showed that the reinforcement of columns rises rapidly with the increasing of grain height，and the reinforcement has little variance with the increasing of span if the grain height keeps invariant. Those findings are helpful to the construction of provincial grain storehouse.
Vertical Bearing Capacity Properties Study of Punched Cast-in-Place Pile Based on Field Test in Driving Analysis Test on Piles of a Thermal Power Plant
Authors: He Lei , Ding Shi Jun , Feng Zi Xia , Han Zhi Wei
Published: November 2012

Through the vertical static load test of pile, studied and demonstrated the applicability of cast-in-place piles in the construction of a thermal power plant’s in Guangxi Zhuang Autonomous Region, china. By testing the internal force of pile shaft, obtained the distribution of axial force, side friction and tip resistance, and ascertained the vertical bearing capacity of punched cast-in-place piles in the engineering geological conditions of this project. This research provides the important quality control standards and design basis for the follow-up pile foundation construction of large area of this project, and also provides reference for other projects in this area.
Experimental Study on Bond Behavior of Profiled Steel Sheet-Lightweight Aggregate Concrete Composite Slab
Authors: Zhang Yan Kun , Han Yan Xiao , Song Ze Zao
Published: November 2012

At present, there are much more researches on the ordinary concrete composite slab, and that on the lightweight aggregate concrete composite slab are relatively less. In this paper, the shear-bond behavior of lightweight aggregate concrete composite slab, with the profiled steel sheet YX-76-344-688, which is commonly used in China is studied. Base on experiments, the cracks developing process and its regularities of distribution, the bonding and slipping between profiled sheeting and concrete, the relationship of load and mid-span deflection, ultimate bearing capacity etc. are studied.
The Investigation of Stability Analysis of Tube and Coupler Scaffold
Authors: Li Hua Zhi , Liu Zhe , Miao Jia Yong
Published: November 2012

The tube and coupled scaffold is widely used in the construction of building, bridge, sports stadium etc, due to the advantage of easily assembling, high load capacity and good overall stiffness. However as a very important temporary structure in the construction, the semi-empirical method has been used for the calculation of ultimate load capacity (ULC), whether the calculation results are acceptable is not given too much attention. To ascertain the safety of using process, the FEM code-Midas is used to investigate and compare the stability and ultimate load analysis method of scaffold, and the impacting factors, such as the span, step distance, height, and width of scaffold, are discussed, the varying process and trend is described in this paper.
Experimental Study on the Flexural Property of GFRP I-Beam
Authors: Zheng Jin Yang , Zhang Guang You , Chen Yun He , Li Shi Zhen
Published: November 2012

The glass fiber reinforced polymer (GFRP) I-beams were tested under the third-point static loading. The load, mid-span deflection and failure modes were recorded during the flexural test. The flexural property was analyzed. The test results indicate that local buckling result in failure of integral structure. The local stability of flange plate is one of the main factors that affect the overall bending capacity of GFRP I-beams. Local strengthening should be adopted in the flange-web joint.
Reliability Control of Quality of Reinforced Concrete Structure during Construction
Authors: Wang Jian Ping , Zhao Xiang Yu , Li Cheng Lin
Published: November 2012

The reliability control of reinforced concrete structure during construction is important for ensuring the safety of the structure. The paper puts forth the main influence factors of construction quality and the control measures of these factors through the discussion of reliability control of construction quality, and given the processing method of quality defects of reinforced concrete structure during construction.
Split Rigidity Method for Analysis of Three-Way Double-Layer Space Grids Structure
Authors: Liu Wen Yang , Zhang Wen Fu
Published: November 2012

Abstract. In this paper three-way double-layer space grids structure is assumed as equivalent sandwich plate, and has been analyzed by the non-traditional theory of plate with three generalized displacements, in which shearing deformation is considered. Based upon the split rigidity method, static analysis and natural vibration analysis of three-way double-layer space grids structure has been studied. The formulas for calculating internal forces, displacement as well as natural vibration frequency are given out. The comparison with finite element method and equivalent sandwich plate method shows that the formulas in this paper are not only simpler than other simplified methods but also of high accuracy.
Study on the Regularity of Surface Movement and Deformation in Long Coal Face with Large Mining Height
Authors: Xiong Zu Qiang , He Jun , Zhao Lei Lei
Published: November 2012

It is an important way to realize mine intensive production by increasing of the coal face length. During the transformation period of mining methods about thick coal seams, the character parameters of surface movement and deformation will be provided to guarantee scientifically mining of thick coal seams in Jincheng mining area. In this paper, numerical simulation, theoretical analysis and field measurement are used for studying the influence of coal face length on surface movement and deformation in the condition of large height mining. The results show that the separated strata space range extended with the increasing of coal face length and advancing distance, the surface movement and deformation become more violent, the mining influenced range also gradually expands, and the maximum surface subsidence and horizontal displacement increases gradually in form of linear relationship. In the condition of fast mining, the duration of abscission layer reduces, and the surface movement and deformation shows obviously hysteretic and zonal characteristic.
Dynamic Analysis of Steel-Concrete Composite Frames with Partial Interaction
Authors: Xia Jun , Shen Z. , Chen Bin
Published: November 2012

The finite element formulations of steel-concrete composite (SCC) beams considering interlayer slip with end shear restraint were established. Free vibrations of SCC beams and frame structures under different slip boundary conditions were examined. The influences of the shear connection stiffness and the slip boundary condition on dynamic characteristics were analyzed. It is shown that the low order 8-DOF element may exhibit slip locking phenomenon in free vibration analysis for very stiff connection. The free vibration frequencies of composite beams and frame structures increase with the shear connection stiffness increasing. Besides, it is found that the natural vibration properties of SCC frame structures are significantly affected by the slip boundary condition, and it should be suitably imposed on all composite beams in dynamic analysis.
Dynamic Behavior of Extra-High Building with Wind Load and Gravity Coupling Effect
Authors: Zhong Zhen Yu
Published: November 2012

Wind-gravity coupling effect(WGCE) is an evident phenomenon of extra high buildings. Cantilever model of tall building structure which includes bending and shear distortion is established in the paper. The equations of wind load and gravity coupling have been concluded and are dispersed into difference form. Amplitude frequency characteristic of the structure and vibration acted by simulated wind load are studied though calculation by Wilson-θ method. The result shows that gravity second order effect of extra-high buildings will be enhanced when ratio of gravity rigidity or ratio of bending and shearing rigidity increase.
The Principle of Equivalent Center of Mass of FPB & Superstructure
Authors: Xia Jun Yong , Hao Hong Xiao , Ning Xiang Liang , Hu Yu Xin , Li Shi Heng , Leng Xin Yun
Published: November 2012

Elaborates on the differences between FPB structure in practical uses and classical models, and puts forward a principle of equivalent center of mass of FPB & superstructure by dynamic analysis. It conducts FEA and experimental validation based on the post yield stiffness and vertical displacement calculated in accordance with the principle. The conclusion states that calculating the post yield stiffness and vertical displacement of the bearing by the principle is more accurate than before.
"Lhasa Hotel" in the Design of Regional Culture
Authors: Xie Li Sheng , Mi Xin Wu , Ge Jun
Published: November 2012

Qinghai-Tibet Railway will have a historic opportunity on Tibet tourism; tourism has greatly boosted the tourism development of the hotel industry in the region. Our in-depth analysis and study of Lhasa area that ideologies, living habits, aesthetic, moral ethics, regional culture, and through understanding, digesting, and application in the design of the Lhasa hotel. Efforts to make the designs in Lhasa Hotel reflect the quintessence of regional culture of Tibet.
Comprehensive Evaluation on the Level of Central Plains Agglomeration Urbanization
Authors: Li Ai Hua , Li Wei Tao
Published: November 2012

From the perspective of the Central Plains Agglomeration for a representation, comprehensive evaluation on urbanization level of all cities in Central Plain Agglomeration was carried out by using gray relation analysis, receive the ranking about urbanization level of all cities in Central Plains Agglomeration, find out the weakness and take measures for them.
A Research on Ecological Design Strategy of Urban Open Space in Northwest Cold Area in China
Authors: Bi Xiao Li , Chen Qian
Published: November 2012

This article is focused on the issues of plazas in Northwestern China. Firstly, it analyzes a series of ecological problems of urban open space in the cold region. Therefore, it proposes an appropriate strategy for urban open spaces at the base of bio-climatic under the cold and arid condition. Finally, taking Baiyin Jingyu Healthy Square as an example, the paper proposes a specific design method based on the bio-climatic conditions.
Analysis of the Development Environment of Urban Intelligent Transportation Systems
Authors: Qiao Li Li , Wang Wei , Zhang Jian , Hu Yong Kai , Gu Hai Yan , He Shang Lu , Zhan Feng Ping
Published: November 2012

Researching the development environment (DE) of urban intelligent transportation systems (UITS) can help achieve their healthy and orderly development. This article is based on the development demands of the UITS and gives a summary of the development opportunities and challenges. The analysis shows that the UITS possesses a favorable DE. National and local governments establish a range of policies to promote its development. The existing information facilities and information technology provide powerful support. However, UITS also faces a series of challenges, including management mechanisms, industrial development, availability of capital, and standards.
Numerical Simulation Studies of Plant Communities’ Effects on Outdoor Thermal Environment in Residential District
Authors: Hong Bo , Qu Yong Jian
Published: November 2012

The outdoor thermal environment has been worsening in recent years due to urban heat-island phenomenon accompanying fast development of urbanization. Many researches have been conducted into the effects of plants on the outdoor thermal environment by field experiment or numerical simulation. However, the plant communities’ effect on outdoor thermal environment has not established by numerical simulation yet. In this paper, the effect of plant communities on outdoor thermal environment was analyzed by numerical simulation. Moreover, the relationship between plant communities and outdoor thermal environment was also studied. The conclusion could be drawn as follows: 1) Platanus orientalis Community, Sophora japonica Community and Magnolia denudate Community have more obvious cooling effect. The shrub communities had a worse cooling effect and the grass was the worst; 2) there was a trend of decline of cooling effect with the decrease of plant communities ’canopy closure and leaf area index.
Eco-Design of Resort Landscape —Take the Design of Yangmei Island Resort as an Example
Authors: Gao Zhao , Wu Yue
Published: November 2012

The landscape design of resort is in the pressing need of implementing ecological idea with which it can be authentically established as the result of sustainable development involving people-oriented idea. The rapid development plus the reasonable application of landscape ecology provide the theoretical basis for the construction of ecotypic resort. Employing the theory of landscape ecology to instruct the landscape construction of resort may guarantee the sustainable use of its resources. The paper explores the fundamental theories and approaches of eco-design of resort landscape with the case of Yangmei Island Resort and elaborates the dominant ecotype idea in the process of designing the resort landscape to practically put the people-oriented idea into effect, aiming at creating a harmonious landscape and optimizing the resort landscape.
Study on Dynamic Properties of Semi-Active Seism Isolator for Building
Authors: Yu Wei Xiong , Yang Sheng Chun
Published: November 2012

The dynamic properties of semi-active seism isolator for building made of magnetorheological elastomers (MRE) were studied. Semi-active seism isolators were designed with MRE, and their dynamic properties at different amplitudes, frequencies, preloads or currents were tested. The results show that the dynamic stiffness decreases with the increase of amplitude or preload, but increases with the rise of frequency or current; the damping ratio ascends with the increase of amplitude, but declines with the rise of preload.
Commercially Used Sulphate Binders Based on Anhydrite
Authors: Gazdič Dominik , Fridrichová Marcela , Dvořák Karel
Published: November 2012

The work was devoted to the analysis of a commercially manufactured binder imported from Germany which is supposed to represent a natural anhydrite according to the accompanying documentation, industrially modified by hydration process activating agents. A similar analysis of the anhydrite binder commercially manufactured in Germany was carried out at the very beginning of investigation into the given problem. In the introductory study of applied research engaged in the feasibility of preparation of self-levelling mixes based on anhydrite binder, a specimen binder made by a German producer declared as a purely anhydrite binder, was analysed. However, it was found out by the analyses performed that this binder is a premium quality -gypsum according to all manifestations by a modified liquefying and retarding agent, possibly by other compounds. Due to potential changes that may have occurred since the initial study in the composition of the so-called anhydrite binders, exploration of composition of the binders currently used in the Czech Republic for preparation of self-levelling mixtures was carried out in this part of the experimental work. The exploration detected that the composition of the binding phase is the matter of know-how for the majority of companies, and as a result, the only one sample of binder has been obtained so far from the company which reserved their anonymity for this work.
An Overview of the Study and Application of Rubberized Portland Cement Concrete
Authors: Li Wei , Wang Xiao Chu , Zhang Jian Peng
Published: November 2012

This paper introduces an overview of the study and application of rubberized portland cement concrete. Comparing to plain concrete, rubberized portland cement concrete, which is widely used in highway, bridge, railway，civil architecture and military building, has small quality and good performance of durability, shock absorption and sound insulation. At present, the research of rubberized portland cement concrete is mostly fastened on performance of application. Founding consummate system info and research method of experience will promote the usage of rubberized portland cement concrete.
Characteristics of Component of Steel Slag Sand
Authors: Lun Yun Xia , Li Kai
Published: November 2012

XRF and XRD were used to test the influence of origin, size and color on chemical and mineral composition of steel slag sand. The results showed that: the four origin slag sand had similar chemical and mineral composition , but the content of each component was quite different; the content of expansion component in different particle size had the uneven distribution; CaO, periclase and their hydration products were the maim components in versicolor particles , compared with ordinary particles, chemical and mineral composition of versicolor particle were relatively simple . It can be concluded that the origin, size and color have obviously effect upon expansion composition content in steel slag sand
Study on Situation and Development of Building Energy Saving in China
Authors: Wang Zhong Hua
Published: November 2012

The world and China's energy situation and the building energy consumption is been summarized and analyzed. On the basis of the characteristics of our climate and building energy consumption, the building energy consumption gap between China and developed countries is contrasted. By contrast, building energy conservation in China is reiterated to be of great significance. Building energy conservation targets and the measures taken in China are concluded and building energy conservation plan in the Twelfth Five-year Plan period is summarized.
Numerical Analysis of Micro-Mechanics on Emulsified-Asphalt Cement Concrete
Authors: Qin Yu , Fu Jun , Pan Xin
Published: November 2012

Emulsified asphalt cement concrete (EACC) has good crack resistance and durability. The influence about the cracking strength of the aggregate shape and the material parameters matching of emulsified asphalt cement concrete were analyzed in this paper through a two-dimensional finite element model built by ANSYS. The circular, square and mixed aggregate had been taken into consideration and the elastic modulus and the Poisson's ratio of the emulsified asphalt cement were changed by 80%, 90%, 100%, 110% and 120% for matching. The results show that selecting the square aggregate can effectively increase the safety reserve of tensile strength of emulsified asphalt cement concrete and the most suitable elastic modulus of emulsified asphalt cement is 25.2GPa and the Poisson's ratio is 0.18, which provides theoretical data for systematic research on emulsified asphalt cement concrete.
Effect of Phosphorus Slag and Fly Ash on Mechanical Properties of High Belite Cement
Authors: Liu Dong Mei
Published: November 2012

The strength of cement mortar in 90 dates all decreased with replacement of PSP or fly ash increasing, but the decreasing trends at 90 dates were clearly less than that at early dates. At 90 dates, the strength of cement mortar with replacement of 40% to 60% PSP was higher than that of cement with fly ash. When replacement of PSP was between from 20% to 50%, the strength of mortar at 90 dates was basically same. So, PSP also can be used as mineral admixture with replacement levels of 20% to 50% in dam concrete. The strength of mortar mixed together with fly ash and PSP was greater than that of mortar mixed only with fly ash or PSP. The influence of PSP and fly ash blending proportion on flexure and compressive strength was not significant. The effect of PSP fineness on early strength was little, but that on later strength was slight.
Comparative Experiment Research on Different Material Improvement to the Influence of Expansive Soil Expandability
Authors: Yang Jun , Wang Jian Ling , Zhang Guo Dong , Tang Yun Wei , Xie Zhi Gang
Published: November 2012

Based on the improved trial test of a construction section of expansive soil subgrade filling in Small Crow first class road in Yi Chang, a comparative analysis about the improvement on the swell-shrink performance of expansive soil test sample by adding lime, cement, fly ash, weathered sand is made. From the applicability and economic perspective, weathered sand improvement with the best effect. The best construction mixing sand ratio for medium and strong expansive soil is determined as10%, the expansive soil after improved treatment can be used as the first class road subgrade filling.
Experimental Research on Solidifying Sediment in Irrigation Districts along the Lower Yellow River
Authors: Ma Liang , Li Xiao Mei , Zhang Rui Juan
Published: November 2012

Based on the analysis of physical characteristics about the desilting sediment diverted from the Yellow River in irrigation districts, the solidified sediment product was successfully manufactured. In the research, it was found that the cement dosage as one of the mixed curing agent had obvious influence on the properties of solidified sediment product. As the compressive strength, impermeability and frost-resistanceproducts of the product meet the requirement of moderate water conservancy engineering, it was successfully applied in the Sanfengan Canal lining and the Yanglanhe Reservoir wave wall construction, which set a good example for the future comprehensive sediment utilization in irrigation districts.
The Research on the Effect of the same Curing Agent for Different Types of Dredged of Mud
Authors: Liu Wen Bai , Yang Xiao Yan , Wang Jia Jun , Shi Wen Hui , Su Jie , Ma Jing Kun
Published: November 2012

The Marine economy is now experiencing a rapid development, with the increase of the construction of the marine and coastal engineering and maintenance engineering for the port and waterway, the contradiction between the dumping of the dredged mud and the protection of the marine environment is becoming more and more serious. Meanwhile, in the process of the construction of the coastal engineering (the sea port), a lot of conditions are often needed for the sea reclamation. Through the curing of the dredged mud, the dredged mud will get good engineering properties and can be applied, which seems to be a good method for solving the contradiction above. The actual problems which will be solved by the experiment are whether a particular curing agent is applicable to all types of solidification of the soil, and can use DPDM software technology for analysis.
Influence of Mixing Method of Mineral Admixture on Performance of Recycled Concrete
Authors: Li Ying , Dai Da Hu
Published: November 2012

In order to improve the microstructure of recycled concrete, the mineral admixtures were mixed into recycled concrete by different mixing method in this paper. It is demonstrated that the early compressive strength of recycled concrete decreased when mixed by fly ash only, but its later strength increasing rate is higher than recycled concrete without fly ash. When mixed fly ash and silica fume in the recycled concrete, the compressive strength of recycled concrete with fly ash and silica fume is higher than the strength of recycled concrete with fly ash only, and its microstructure tend to be dense.
The Mechanical Characteristics of the under Layer of Pavement of Large-Stone Asphalt Mixes
Authors: Li Hui Xia , Tong Shen Jia
Published: November 2012

The Large-stone Asphalt Mixes (LSM)is adopted to solve the problems of the inadequate rutting resistance and poor durability to the asphalt pavement because of the good properties of high temperature stability and eliminating the reflection cracking. As under layer of asphalt pavement the Large-stone Asphalt Mixes is less researched than base course. The mechanical properties of every pavement layer can be analyzed under the effect of temperature and load coupling when the height of LSM (Large-Stone Asphalt Mixes) is different. Combined the properties with the demand of structure and the relationship of the layer and maximum nominal diameter, recommend the resonable height of the LSM.
A Brief Discussion on Green Architecture Design and its Application Strategy in Implementation
Authors: Wang Qi
Published: November 2012

As a new way of architecture design, green architecture design which focuses on reducing energy consumption, utilizing natural resources and improving environmental condition has drawn international attention. This paper mainly analyzes the main application strategies in building construction based on its concept and principles, indicating green architecture design is effective in saving energy and protecting environment which has become a tendency of architecture design in future.
Smart Home: Chicago`s Greenest House and Green Architecture Popularity
Authors: Yang Jing , Li Jiang
Published: November 2012

In keeping with the new era of information and ecology, the urgent mission of the architect is how to provide the latest green house information and some of the practices and relevant hands-on experiences for the public. In 2012, the Museum of Science and Industry of Chicago built a green house in its yard. The green house exhibition-Smart Home: Green + Wired highlights the importance of environmentally friendly effort. The exhibition intents to present for residents and visitors on how green house could help improve the environment as well as save money. The exhibition also focuses on the purpose of working together: the academia of architecture, the industrial companies and the public, trying to conserve and protect Chicago for future generations. Furthermore, with the introduction of Smart Home, this essay aims to inspire the deeper thinking about popularity of green architecture in China.
Isolation of Endophytic Fungi from Xylocarpus granatum and Study of Antimicrobial Activities
Authors: Su Xiang Ping , Wang Xiang , Huo Li Li , Wu Jun , Zou Kun , Gong Da Chun
Published: November 2012

Endophytic fungi isolation from the Meliaceae plant Xylocarpus granatum was investigated and 20 potential pure strains were isolated. According to microbial taxonomy and morphology method, 10 species Rhizoctonia DC of Deuteromycotina, Penicillium 6 species, 1 species of Aspergillus, 1 species Trichoderma and 2 species Mucor of Zygomycotina were identified with microscopic examination. Antibacterial experiments were carried out with Oxford cup assay and 10 strains metabolites with strong antibacterial activity were found.
Three Parallel Rivers World Natural Heritage Site Ecological Safety Protection Research
Authors: Li Hui , Yao Wen Jing , Wang Si Qi , Su Peng Fei , Duan Qiu Cen , Wang Wen Xi , Wang Ji , Li Guo Yan
Published: November 2012

It is necessary that research ecological risk and ecological protection to Three Parallel Rivers world heritage site in China. Select forest fire, landslide and debris flow as a natural ecological risk source, and urban construction, tourism, fuel timber as artificial ecology risk source, we have confirmed the ecological end point. The study area was divided into risk subdistrict, and we have obtained every subdistrict comprehensive ecological risk value with ecological risk calculation model by GIS, Have evaluated ecological risk and spatial distribution in the area. We make ecological safety protection planning. The whole area is divided into three protection level, the first level reserve area is 6 thousand square kilometers, the second level is 12 thousand square kilometers, the third level is 16 thousand square kilometers. We have formulated the biodiversity and cultural diversity protection planning. Research indicates that landscape ecological protection, restoration and reconstruction are key way to building regional ecological security pattern.
Effects of Adding Nitrifying Bacteria on Microbial Communities and Nitrification in a Laboratory-Scale a/O Reactor Treating Leather-Tanning Wastewater
Authors: Wang Zhu , Liu Bo , Li Ai Min
Published: November 2012

A laboratory-scale anoxic/oxic reactor was used to analyze the effects of adding nitrifying bacteria on microbial communities in the treatment of leather-tanning wastewater. The reactor was operated in series in continuous flow mode for 25 d after an acclimation period of 45 d, and the nitrifying bacteria were added after the acclimation period. The addition of nitrifying bacteria into the wastewater significantly enhanced NH4+-N removal efficiency. The Arrhenius and Jacob-Monod models were applied to determine the optimum and acceptable operating conditions for this process. The optimum temperature range and concentration of dissolved oxygen were 15-30 oC and 5 mg L-1, respectively. Use of Nitrosomonas europaea and Nitrobacter were considered reliable for leather-tanning wastewater treatment due to their dominant status as nitrifying bacteria. Substrate half-saturation constants for ammonia oxidizing bacteria and nitrite oxidizing bacteria were 24.13 mg L-1 and 5.43 mg L-1, respectively.
Design of Leachate Treatment Project in Fan County Municipal Solid Waste Landfill Site
Authors: Gong Wei Jin , Liu Yue
Published: November 2012

The leachate treatment project in Fan county Municipal Solid Waste Landfill Site was constructed according to the Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889- 2008). It adopted Striping－UASB－A/O－MBR－RO process. Since being put into operation on June 15, 2009, the leachate treatment project has operated for more than two years, and the effluent quality was excellent.
Improved Method of Data Processing for Flocculating Sedimentation Experiment
Authors: Lin Yan , Guo Shu Wen , Lin Jing Hua
Published: November 2012

The shortages of the present method of data processing of flocculating sedimentation are pointed out and analyzed in this study. A new method of data processing is put forward and the advantages of this new method are discussed. Compared to the conventional method, the isolines of partial removal efficiency need not to be drawn when the new method is employed and the new method is straightforward, practical and accurate and it is worth to be popularized.
Identification of the Pollution Source by Using a Semi-Discretization Approach
Authors: Zhang Wen , Wang Ze Wen , Liu Tang Wei
Published: November 2012

This article Considers an inverse problem for identifying a pollution source in a watershed. The pollution concentration is governed by a linear advection-dispersion-reaction equation with a point pollution source modeled by the Dirac function. Firstly, a system of first-order ordinary differential equations is obtained by using the semi-discretization approach and the approximation of the Dirac function. Then the location of the point source is identified from the measurements. Secondly, the numerical scheme is established for recovering the strength of pollution based on the above semi-discretization scheme and the location of the point source. Thirdly, the error analysis was investigated from two aspects: both the semi-discretization and the approximation of the Dirac function. At last, the numerical results show that the presented method is effective.
A Novel Way of Catalyst-Free-Esterification of Ethyl Cellulose with Phthalic Anhydride
Authors: Xu Jing , Zhang Chi , Zhou Ye , Qu Peng , Han Hui Min , Wang Jing
Published: November 2012

Ethyl cellulose (EC) was grafted with phthalic anhydride (PA) by esterification reaction without any catalyst in ethanol-methylbenzene mixture. The chemical structure and thermal stability of grafted copolymer (EC-g-PA) were analyzed by FT-IR and TGA, respectively, and compared with those of EC. The FT-IR results showed that EC has been grafted successfully with PA and the TGA results also show different thermal behavior between EC and EC-g-PA.
Environment Air Pollution Analysis of XiaoYang Barbecue Bar in Xi’an
Authors: Guo Hua , Liu Chao , Zhao Xi Ping , Wu Yin Shan
Published: November 2012

The concentration of CO2 and PM2.5 were monitored at XiaoYang barbecue bar of Jianshe west road in Xi’an. Then we analyze the daily variation characteristics of CO2 and PM2.5 concentration between peak hours of dining and the common hours. Using GBT18883-2002 and the United States national air quality, Air quality at XiaoYang barbecue bar is evaluated by the data from the monitoring, which shows that the air quality of some barbecue bar in Xi’an is not in accord with the national standard. Air pollution is serious. so much more attention should be paid.