bluuebunny/crossref_metadata_2025_split huggingface dataset:
Post-Corrosion Mechanical Analysis of Sn-Zn Alloys: A Short Review
Authors: Nazeri Muhammad Firdaus Mohd , Masri Mohamad Najmi , Mohamad Ahmad Azmin 
Published: December 2019

AbstractRenewed interest in investigating and improving the corrosion performance of the Sn-Zn based alloys were ignited as this alloy produces excellent mechanical properties but suffered from corrosion attack. To support the electrochemical investigations, mechanical analysis is normally performed. This article focuses on the most common mechanical analysis used, including the basic experimental setups, common parameters and selected case studies that are beneficial in understanding the corrosion process.
Preparation and characterization of micro- crystalline cellulose / chitosan films
Authors: Chie Song Cheah , Wahab Mohamad Kahar Ab 
Published: December 2019

AbstractThe microcrystalline cellulose (MCC) chitosan film was produced through solution casting with different composition of chitosan and different plasticizers. This MCC chitosan film was a biodegradable polymer due to all the ingredient was natural resources. MCC and chitosan can be found abundantly in the earth, and thus, can be obtained easily. Several testing were conducted such as tensile test, scanning electron microscope and Fourier transform infrared. The optimum ratio for the MCC chitosan was 90: 10 (MCC: chitosan). At this ratio, MCC chitosan has the highest tensile strength which was 42.16 MPa for the film without adding the plasticizer. MCC chitosan film also having the addition of plasticizer to improve film’s properties. Results show that addition of plasticizer able to improve properties of MCC chitosan film such as high tensile strength, high elongation at break and low Young’s modulus value. The percentages when compared MCC chitosan film with glycerol as plasticizer than the control film on the optimum ratio for tensile strength was higher 106%; while for film with PEG as plasticizer was higher 102%, elongation at break was higher 121% and 110% for both glycerol and PEG respectively when compared to control film.
Experimental measurement for non-spherical bulk materials flow behaviour in rectangular enclosure
Authors: Fadzir Anis Farhanah Mohd , Rani Siti Ilyani , Gimbun Jolius 
Published: December 2019

Abstract
Dust control is a major concern in food industries since dust emission is generally unavoidable during bulk material handling. Obtaining a better understanding of the way particles are pulled away from a stream of particles and the generation of a dust cloud will assist in the design of more efficient dust control systems. In this paper, the particles- air interactions during free fall of bulk powder is reviewed. An experimental investigation was performed to elucidate the effect of conveying velocity and particle properties on velocity profiles. The Laser Doppler Anemometry (LDA) technique was employed to measure the particle velocity during free fall. Results revealed that the particle properties (particles with flaky shapes and lower bulk density) had a great influence on dust cloud generation as compared to the conveying velocity. The results presented here may facilitate the development of a quantitative tools for dust control system design that deal with a falling stream of bulk powder.
Effect of Surface Preparation on the Isothermal Oxidation of Fe-33Ni-19Cr Alloy
Authors: Parimin N , Jemahri  
Published: December 2019

Abstract
The effect of surface preparation on the isothermal oxidation behavior of Fe-33Ni-19Cr alloy was study in this paper. The surface preparation of the test samples was obtained by grinding process using different grit of silicon carbide abrasive paper, namely P600, P800 and P1000. The surface area and weight of the sample were measured before the oxidation test, by using Vernier caliper and analytical balance. The ground sample of Fe-33Ni-19Cr alloys were isothermally oxidized at 1000℃ for 150 hours in laboratory air. The weight of oxidized samples was recorded after the isothermal oxidation test at every 25 hours exposure duration in order to determine the oxidation kinetic of all samples. The oxide surface morphology of Fe-33Ni-19Cr alloy was characterized by scanning electron microscope. The oxidation kinetic of all samples displayed a weight gain pattern as the exposure duration increase, followed a parabolic rate law. While the result of surface morphology shows that the lowest grit of surface finish, P600, display less oxide exfoliation occurred.
Formless concreting new small-size equipment universal technological set energy consumption features determination
Authors: Emeljanova I A , Anishchenko A I , Virchenko V V , Subota D U , Blazhko V V 
Published: December 2019

Abstract
A scheme for the implementation of shotcrete work in a construction site using a new technological kit is presented. The basic machine of this kit is a hose concrete pump.The design of a pump with a hydraulic drive is considered, which makes it possible to adjust the rotation frequency of the working body of the concrete pump in a wide range and reduce the level of pulsation of the mixture at the outlet of the concrete pump. Energy consumption is considered as a universal set of new small-sized equipment, the structure and circuit diagram of which are presented in the article. The dependencies for determining the power required for machines - modules of this kit are given. The effectiveness of the kit for continuous concreting using the wet gunning method in a building site due to the combination of separate operations over time is shown.
Digital models and the effect of error when shooting terrain for high-speed traffic
Authors: Shevchenko A A , Matviienko O O , Lyuty V A , Manuylenko V G , Murygina N A 
Published: December 2019

Abstract
The article discusses general information about Ukraine and the possibility of introducing high-speed traffic using modern technologies for surveying the area. This step makes it possible to work out more detailed options in the design. Surveying using electronic total stations and GPS devices allows you to accurately determine the spatial position of the site, but because of errors in determining the coordinates of individual points, it does not give a real ratio of the curvature of neighboring track points when they are close. Railways require constant and accurate monitoring of the structural state of objects this data can be obtained using mobile laser scanning, which allows you to collect a high-resolution three-dimensional survey of all objects in the visibility range of the scanning system in a short period of time. Having an extensive transport infrastructure and at the crossroads of the most important areas of world trade between Europe and Asia, Ukraine has all the prerequisites for the development of the transport industry within the framework of a balanced state policy. Today, all countries are faced with the task of further expanding the space of non-power scenarios for the transformation of the financial and economic order in the world.
Dynamic impact on the construction of the railway track and on the deformability of the basement
Authors: Shtompel A M , Kondratenko O P , Bratchenko O V , Pashchenko V V , Baulin D S 
Published: December 2019

Abstract
The qualitative performance of the track facility in Ukraine depends upon the technical state of rail track structure, which is determined by correspondence of the characteristics to the current Regulations for laying and maintenance the track on railways of Ukraine. And the parameters indicating the rail track stability directly depend on the carrying capacity of the rail base and the stress-strain behavior.
The main indicators of the state of the continuous welded rail (in particular, the parameters of the track geometry), deviations from the normative position of the track rails in the profile and in the plan directly depend on the carrying capacity of the under sleeper base, that is, on its deformative properties.
In this study, the under sleeper base deformability refers to the ability of the superstructure to operate under conditions of limitation to a certain level of pace (speed) accumulation of the track failures.
Determining the level of the dynamic load on the railway track, its effect on the performance of its elements, and the under sleeper base deformability of the continuous welded rail will make it possible to quantify the dynamic effects on the railway track construction and its impact on the under sleeper base deformability.
The Impact of Two-Layer Lubrication Parameters on the Service Life of Railway Rails
Authors: Voronin S. , Stefanov V. , Onopreichuk D. , Babenko A. , Pavlova E. 
Published: December 2019

Abstract
The prerequisites, basic hypotheses and sequence of creation of a mathematical model for estimation of service life of railway rails in conditions of two-layer lubrication are given in the article. The created mathematical model is presented in the final form. The model takes into account the geometry of the wheel-rail contact, the initial and constant surface roughness, actual loads on the rail, speed of the rolling stock, strength characteristics of steels and the antifriction additive, as well as the basic parameters of two-layer lubrication. The main parameters of lubrication include the concentration of solid antifriction additives in oil which is sufficient to fill irregularities of the contact surface; the boundary molecular oil film thickness. The results of calculations using the developed mathematical model are presented. The performed calculations reveal the positive effect of the parameters of a two-layer lubricant on the resource of rails. The anti-wear effect of the lubricant increases as the concentration of graphite in the oil increases and the weight of the carriage decreases. Based on the performed calculations, conclusions and recommendations were obtained regarding further experimental verification of the mathematical model, as well as the influence of the parameters of two-layer spray lubrication on wear and service life of transport rails.
Strength-strain state of the structures with consideration of the technical condition and changes in intensity of seismic loads
Authors: Barabash M S , Kostyra N O , Pysarevskiy B Y 
Published: December 2019

Abstract
The paper focuses on determining the reserve in load bearing capacity of the building structures reconstructed in the seismic zone of Ukraine. The authors propose the method for simulation of the earthquake load acting on the structure with account of nonlinear material properties. In design of buildings and structures in seismic zones, in addition to calculations for the main load combination, calculations for the emergency combination of loads should also be made with account of the following seismic impact - minor earthquake (ME), design earthquake (DE) and max design earthquake (MDE). To evaluate behaviour of structures in earthquake load beyond elasticity, the nonlinear pushover analysis is used. With this the technique it is possible to consider the nonlinear properties of structures based on their bearing capacity (safety margins) rather than using the coefficients of inertial forces, as in the spectral method. The nonlinear static analysis of building structures allows you to consider the higher mode shapes of vibrations, interaction in the system ‘overground structure –foundation soil’.
Research of stress-strain state of basalt fiber polymer rods at adhesive anchoring in concrete
Authors: Kichaeva O , Zolotov S , Firsov P , Togian Zafari 
Published: December 2019

Abstract
The results of experiments to determine the strength and deformability of adhesive anchoring, depending on the depth of embedding basalt fiber polymer rods in the concrete array, are given. The technique of basalt fiber polymer reinforcement preparation for conducting experiments to determine basic longitudinal deformations is fully described. Numerical characteristics of basalt fiber polymer reinforcement for tensile and compression test, to determine bearing capacity in concrete, were obtained. Test methods of adhesive basalt fiber polymer joints are described in detail, as well as research to determine the influence of technological factors on the strength of adhesive bonding, using acrylic modified compositions. Experimental research on the effect of concrete class, adhesive layer thickness and adhesive joint distance from the face of a concrete specimen, on a joint strength, has been performed. The obtained results of experimental research data can be used for attachment joints projecting and industrial technological lines development, as well as for further polymeric adhesive materials, widely applied in industrial and civil engineering, improvement.
Strengthening prefabricated reinforced concrete roof beams that are damaged by corrosion of concrete and reinforcement
Authors: Kramarchuk Andrii , Ilnytskyy Borys , Lytvyniak Oksana , Famulyak Yuriy 
Published: December 2019

Abstract
In this article are analyzed different methods of strengthening reinforced concrete structures as ceilings and coverage. And there are also structured methods and the principles of their execution. In this article are described in detail and are shown graphically the methods of strengthening prefabricated reinforced concrete I-beams of coverage (its span is 12 m), which were in accident technical state at the moment of examination. The compression and tensile areas of concrete in structures were completely destroyed by corrosion, and furthermore the joint work of normal concrete and pre-stressed reinforcement was not ensured. In general, the examined methods of strengthening concern the reinforced concrete structures, where the strengthening elements come to work in conjunction with the existing concrete and reinforcement. Presented method consists in total forces transfer on strengthening elements, i.e. concrete and reinforcement of the existing reinforced concrete structures of floorings are completely excluded from work.
Improvement of the estimation method of the possibility of progressive destruction of buildings caused by fire
Authors: Pozdieiev S , Nekora O , Kryshtal T , Sidnei S , Shvydenko A 
Published: December 2019

Abstract
With the progressive destruction of building structures, socioeconomic losses reach the biggest level, especially when the buildings have a high degree of responsibility. For such buildings there is a standardized requirement to carry out a calculated estimation of the possibility of progressive destruction. The article outlines the main provisions of the calculation method as to the estimation of the possibility of progressive destruction, with the failure of one or more compressed elements, that must be removed from the general structural system of the building frame consisting of steel beams, CFST and reinforced concrete columns. The basic principle of the method is the hypothesis about formation plastic joints in beams and columns. The possibility of progressive destruction is estimated according to the energy criterion based on comparison of the work of internal and external forces on the possible displacements of the system, which in such conditions is geometrically variable. The proposed method is productive and cost-effective compared to existing methods that involve complex mathematical models and software complexes.
Quality control the technical condition of the building structures by randomization
Authors: Savytskyi M V , Shevchenko T J , Savytskyi O M , Savytskyi A M 
Published: December 2019

Abstract
Reinforced concrete structures are currently the most common construction and have a long history of application. In addition to loads, structures are exposed to external aggressive environments. As a result of this, structures are often damaged. For repair planning, diagnostics and assessment of the technical condition of structures are necessary. The regulatory literature does not contain data on the required sample size and designation of zones and places of control of structures. Known studies are devoted mainly to the substantiation of the methods of instrumental control of the parameters of building structures. The building structures are divided into two types: same type structures and unique ones which are characterized by a large surface area. Therefore, various approaches to diagnosing the technical condition of such structures are necessary. We have developed a methodology for control of structures using the randomization method. The technique allows, with a given degree of confidence, to reasonably designate the sample size of structures, a place or a control zone. This allows you to replace the complete control selective and significantly reduce the amount of testing.
Statistical characteristics of strength distribution of normal sections of bended reinforced concrete elements and their analysis
Authors: Shkurupiy A A , Mytrofanov P B , Davydenko Yu O , Horb A G 
Published: December 2019

Abstract
The results of simulation of stochastic corrosion of reinforcement and geometrical characteristics of normal rectangular cross-sections of bent concrete reinforced concrete statically determined beams (elements) with reinforcement on one level in the stretched concrete zone are given. It is proved that in solving the problems of the reliability of such structures, the real histograms are described by various statistical laws. It was also established that considering the effects of corrosion is important for determining the real statistical law of the distribution of the corrosion damage stage in various materials. Parameters of the variation of the variability of the normal section of the considered reinforced concrete structures differ depending on the initial parameter of the variability of reinforcement corrosion damage. The histogram of stress distribution in the reinforcement of the reinforced concrete element and the strength of its normal cross-section do not correspond to the histograms of normal distribution. The use of the Gauss distribution law when determining the strength of a normal section of a bent concrete element, considering the effect of corrosion, can lead to significant inaccuracies in determining the reliability parameters of such structures. Failure to consider sufficiently large asymmetry and excessive values for the resulting statistical distribution laws can lead to significant errors in solving the reliability problems of such structures.
Determination of geometric parameters for rational load-bearing unit of bridge cylindrical column pier
Authors: Synkovska O V , Ihnatenko A V 
Published: December 2019

Abstract
This paper deals with a bridge pier energywise uniform strength cylindrical steel-concrete load-bearing unit having a mesh case, which is made of an expanded metal mesh, as the most rational and the least resource-demanding one, using the nonwaste technology. The rational parameter selection method, which guarantees cross section uniform strength for the suggested load-bearing unit, is provided. The concrete core of the given element is a hollow cylindrical element that varies in height and whose centre of gravity coincides with an external loading point for any horizontal cross section. In addition to uniform strength, the hollow enables you to control the centre of gravity of the given complicated compound cross section of a cylindrical steel-concrete load-bearing unit. The calculation method to determine the main geometric parameters of the uniform strength load-bearing unit of a bridge cylindrical column pier having the lateral cross section area that varies in height is provided. The geometric parameters are the centre of gravity and its coordinates, central inertia moments and the radius of inertia. To exclude an impact of random eccentricity on a complicated compound cross section of a pier uniform strength steel-concrete load-bearing unit, the method to design a cross section core is provided.
1Laboratory experimental research of loading friction forces acting on the lateral surface of tapered piles in structurally unstable soils
Authors: Ubyivovk A , Samorodov A , Kupreichyk A 
Published: December 2019

Abstract
In modern urban conditions, needs arise for the development of sites, which are geotechnically complex and disadvantageous for construction. The peculiarities of such sites, among other things, include the presence of structurally unstable soils that exhibit subsidence deformations when wet or under dynamic and vibration loads due to a decrease in the strength of structural bonds. In this regard, the development and implementation of rational design solutions are of current interest when designing and constructing foundations in the presence of structurally unstable soils. One such solution is the use of bored piles. When designing piles for structurally unstable soils, the action of loading friction forces should be taken into account; these forces can arise if the subsidence rate of the soil mass around the pile exceeds the subsidence rate of the pile itself. The study of the interaction of a structurally unstable soil mass with piles and the corresponding theoretical justification are necessary to clarify the methods for evaluating loading friction forces. In an experimental study, the effect of reduction of loading friction forces depending on the taper rate of the pile was discovered, and the results of laboratory measurements of loading forces were analyzed using various schemes for modeling subsidence deformations.
The effect of added finely dispersed calcite on the corrosion resistance of cement compositions
Authors: Borziak O S , Plugin A A , Chepurna S M , Zavalniy O V , Dudin O A 
Published: December 2019

Abstract
Many types of the corrosion of Portland cement stone immersed into inorganic liquid media are conditioned by chemical exchange reactions between the substances dissolved in them and cement hydration products. To prevent the corrosion formation in corrosive media it is necessary to form cement clinker hydration products that do not enter into ion exchange reactions in the solutions. The concrete structure defines the penetration rate of corrosive ions and that of the removal of corrosion products, in other words the behavior of corrosive processes. The investigations that were carried out showed that the presence of finely dispersed organogenic calcite (chalk) in the cement stone composition results in a change of the phase composition of the hydrates of new formations, i.e. it results in a decreased content of the free calcium hydroxide and the binding of aluminate phases to form stable hydration products. The use of this additive contributes also to the compaction of the microstructure of cement stone due to the occupation by additive grains of the vacancies in the gaps between the cement grains and due to an increased dispersion of hydration products for which calcite particles serve as crystallization centers. All these factors contribute to an increased corrosion resistance of the cement stone and the concrete exposed to the action of corrosive solutions.
Using solid household plastic waste in the construction of soil embankments
Authors: Mykhailovska O V , Zotsenko M L 
Published: December 2019

Abstract
The article analyzes innovative ways of using crushed solid plastic in a mixture with soil for arrangement of soil embankments for various purposes. Using a mixture of loam loess and crushed plastic, on the one hand, solves the environmental problem of plastic recycling, and on the other hand, creates technological material for the erection of the embankment. In order to determine the suitability of the material, laboratory studies of the characteristics of the mixture were carried out. For each sample of the mixture, the optimal humidity and density of the skeleton were determined by dynamic compaction in the MDU-1. The modulus of deformation of the compacted specimens is determined. The article investigates the characteristics for the composition of the loam loess and crushed plastic containers in the ratio of 80:20 %.