bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of Self Compacting Geopolymer Concrete (SCGC) haunch beams at monotonic loading and loading-unloading scheme
Authors: Purwanto  , Nuroji  , Ekaputri Januarti Jaya , Indriyantho Bobby Rio , Riko Rydell 
Published: June 2023

Abstract
Numerous reinforced concrete structures require strengthening due to mistakes in detail engineering design, incorrect execution during construction, or overloading. One method of structural strengthening is to use haunch beam casted near column. The development of infrastructure in Indonesia leads to an increase in cement use. This phenomenon causes a greenhouse effect due to higher CO2 emissions, so that an effort is performed in order to reduce the use of cement concrete by using geopolymer concrete. This study aims to experimentally analyze the behavior of haunch beams using both Self-Compacting Geopolymer Concrete (SCGC) and conventional Self-Compacting Concrete (SCC) in terms of load and deflection at first crack, yield, and ultimate conditions as well as crack pattern and plastic hinge of the beam. This study utilized four specimens consisting of SCGC and SCC haunch beams with a compressive strength fc’ of 31 MPa. All identical specimens were tested at monotonic loading and loading-unloading conditions. As a result, the haunch beams due to monotonic loading have larger load capacity and deflection compared to the haunch beams due to loading-unloading. The SCGC haunch beam has slightly lower load capacity and smaller deflection compared to the SCC haunch beam. This shows the SCGC performance is relatively similar to that of the SCC. The SCGC can substitute the SCC, especially for structural reinforcements. Due to monotonic loading and loading-unloading state, both the SCGC and the SCC haunch beams were plasticized at the same location at the haunch end. By implementing the haunch beams, plastic hinges move away from the column.
Flexural strength and drift ratio of reinforced concrete beams with longitudinal square hole
Authors: Sumiati  , Wibowo Leonardus Setia Budi 
Published: June 2023

Abstract
The main aim of this investigation was to study the flexural strength and drift ratio of simply supported rectangular RC hollow beams (with a longitudinal square hole) subjected to gradually increased and symmetrically applied one-point load. Each hollow beam had a 300 mm2 and 900 mm2-area of a square, and the position of the center of the hole was 80 mm from the top. The cross-section of the beam, the amount of longitudinal steel, and the stirrups of the beam was kept constant. The flexural strength and deflection of these hollow beams were compared with that of a solid RC beam that had the same outer dimensions and steel reinforcements. A comparison of experimental results shows that specimens with square holes 10 x 30 achieve higher peak load, MOE, and MOR. On other hands, solid beam specimens achieve a larger drift ratio.
Structural evaluation of existing buildings using surface ground motions
Authors: Partono Windu 
Published: June 2023

Abstract
Research on new seismic sources and seismic data has already performed in 2016 to 2017. Four new shallow crustal fault sources were observed surrounding the city of Semarang, the capital city of Central Java Province, Indonesia. The seismic parameters related with the seismic mechanism (reverse fault) and the maximum magnitude prediction (6.5 Mw) for each seismic sources was also released based on the 2017 research. Following this research, structural evaluation especially for buildings that was designed and constructed based on 2002 Indonesian Seismic Code was also performed. The spectral acceleration design of 2002 seismic code was developed based on subduction source located at the southern of Java island. The structural evaluation was performed for all university buildings located at the Diponegoro University. This paper describes the seismic hazard analysis results of the university area and an example results of building evaluation located at this area. The seismic hazard analysis was performed based on the 2002 Probability Seismic Hazard Analysis/PSHA of the code and the Deterministic Seismic Hazard Analysis (DSHA) of four seismic sources. Two different structural analysis were conducted for all buildings such as structural deformation and drift ratios. Based on the seismic hazard analysis results, all buildings located at the university area were strong enough in resisting the surface ground motion (Peak Ground Acceleration/PGA) due to shallow crustal fault earthquake scenarios having magnitude 6.5 Mw. The buildings deformation and drift ratios calculated using 2002 Indonesian seismic code are greater compared to the same analysis calculated based on deterministic model of shallow crustal fault sources.
Nonlinear analysis of interior and exterior beam-column connections under reversed cyclic loading
Authors: Tambusay A , Suryanto B , Suprobo P , Nelson JJM 
Published: June 2023

Abstract
This paper presents a case study into the application of nonlinear finite element for the analysis of interior and exterior beam-column joints under reversed cyclic loading. Three beam-column joints, with different reinforcement configurations and test conditions, were considered to assess the accuracy of the currently available constitutive models in predicting the full hysteretic response of beam-column joints under reversed cyclic loading. To this end, the three beam-column joints were modelled in ATENA-GiD which implements nonlinear constitutive models for steel and concrete, the latter of which are formulated within the context of crack-band and crush-band approaches. In this paper, the default constitutive models in the program were employed to evaluate the accuracy of the existing modelling and analysis procedures. From the series of results presented, it is shown that the existing constitutive models are capable of predicting various aspects of the joint behaviour under reversed cyclic loading with good accuracy. This includes the peak load capacity, degrees of pinching and strength degradation, strength and stiffness degradation, unloading and reloading stiffnesses, crack patterns and failure modes.
Applying moment redistribution and externally bonded FRP in beams for seismic strengthening of RC frames
Authors: Utomo Junaedi , Jati Dinar Gumilang , Tanudjaja Felix Adi , Lie Han Ay 
Published: June 2023

Abstract
The approach for seismic strengthening of RC frames using moment redistribution and externally bonded FRP is especially applicable for enhancing the performance of a building that is designed prior to the introduction of the new seismic codes. The design and detailing requirements for these building categories were conducted following the capacity design principle. Based on the more recent codes, these buildings are under-designed, and seismic strengthening has become mandatory. Additionally, the buildings might need to be strengthened to fulfill the stringency design requirements of modern seismic building codes. The moment redistribution theory is based on the principles of transferring a moment to sections with lower stresses when the peak moment reaches the ultimate capacity of the section. The redistribution of moments has to be established before all the critical sections can attain their ultimate flexural strength. FRP materials are characterized by their high strength and lightweight. Externally bonded FRP is relatively cost-effective, less invasive, and easily implementable because of the minimal surface preparation. Apart from the moment capacity increase, externally bonded FRP could also improve the shear capacity at critical sections through confinement to an area within the boundaries of the FRP.
Evaluation of bonding performance of ultra high-performance concrete with fly ash content as overlay on normal strength concrete.
Authors: Kuncoro A , Pranoto H D , Sacca L W , Antoni A , Hardjito D , Tanojo E 
Published: June 2023

Abstract
Ultra High-Performance Concrete (UHPC) has good mechanical strength and durability, so it can be the solution for an overlay material for old materials that need to be renewed. The problem with using UHPC as a construction material is the high price and sustainability, so a partial replacement for cement is required to reduce production costs, energy consumption, and CO2 gas emissions. Bonding performance is an important parameter and must be considered when applying UHPC as an overlay material. The bonding performance test of the UHPC consists of three tests: the slant shear test, splitting tensile, and direct tensile/pull-off test. The results of this study were compared with the standards of ACI 546R-14 and M.M. Sprinkel & C. Ozyildirim. Based on the test results, replacing 40% of cement with fly ash on UHPC is good to use as an overlay because it meets applicable standards. The test results showed an increase of 27% in the slant shear test and 37% in the splitting tensile test compared to the existing standard. Replacing cement with fly ash in UHPC can also increase workability, reducing the need for superplasticizers, reducing UHPC production costs by 18.4%, energy consumption, and CO2 emission problems.
Stiffness modulus of reclaimed asphalt binder modified with local bio-rejuvenator in Indonesia (dynamic shear rheometer to van der poel nomograph test result)
Authors: Sihombing Atmy Verani Rouly , Subagio Bambang Sugeng , Hariyadi Eri Susanto , Sihombing Reza Phalevi 
Published: June 2023

Abstract
This study intends to examine the effect of using bio-rejuvenators (BioCS and BitutechRAP) on Reclaimed Asphalt (RA) binder as seen from the asphalt binder stiffness modulus (Sbit) based on laboratory testing using Dynamic Shear Rheometer (DSR) Frequency Sweep which is compared to Sbit resulting from analysis using Van der Poel nomograph under RTFO (rolling thin film oven) conditions. The comparison was analyzed by looking at the adjustment factor produced from each type of asphalt binder testing. The types of asphalt binders tested were pen 60/70 as control asphalt binder, 23% BioCS mixed in RAbinder, and 17% BitutechRAP mixed in RA binder. The results showed that the Sbit value from the DSR and Van der Poel test results was not too much different, with an adjustment factor of 1.61, the addition of BioCS to the RA binder was more influential than BitutechRAP, this was indicated by the adjustment factor of the BioCS + RA binder value of 2.84 which is close to the pen 60/70 adjustment factor value of 2.64.
The effect of polypropylene fiber on the mechanical properties between hybrid fiber geopolymer concrete and geopolymer concrete in elevated temperature
Authors: Farida F M , Hardjasaputra H , Surahman A , Sofwan A , Mukti R R 
Published: June 2023

Abstract
This paper has influence on discovering the behavior of hybrid polypropylene fiber reinforced geopolymer concrete under constant and elevated temperature with the purpose to determine the mechanical properties of the material. While the expertise and acquaintance with concrete behavior under constant temperature are well known, the behaviour under elevated temperature has to be seriously explored. This study objectives is to match between the mechanical properties of unburnt and burnt fiber reinforced geopolymer concrete. This study uses experimental investigation. Compression and splitting tensile tests were conducted on the 150 mm cilinder mold. Meanwhile, flexural tension test was conducted on 100 mm x 100 mm x 450 mm rectangular mold. The result of both materials, without set fire to and with set fire to, are analyzed. The gained findings for burnt material are the compression test value cut down, otherwise, the splitting tensile test and flexural tensile strength grade increase.
The influence of calcium oxide doses as an activator on the compressive strength and mechanical characteristics of cement-free mortar containing ground granulated blast furnace slag
Authors: Djayaprabha Herry Suryadi , Hermawan  
Published: June 2023

Abstract
In the construction industry, cement-based materials as aggregate binding agent are still widely used. Due to the environmental concern, researchers are working to create eco-friendly cement-free binding materials. Calcium oxide (CaO) is a reactive earth metal oxide that could serve as a potential activator for ground granulated blast furnace slag (GGBFS). In this experimental study, the cement-free mortar was produced by using GGBFS as the base material and CaO as an activator with varied doses of 5%, 15%, and 25% with a fixed water-to-binder ratio (w/b) of 0.4. The results showed that the 28-day compressive strength values of the mixture with an amount of CaO of 5%, 15%, and 25% were 21.45, 32.03, and 25.80 MPa. Moreover, the values of bulk density and porosity of free-cement mortar at the age of 28 days ranged between 1.932 - 1.939 g/cm3 and 22.66% - 24.95%, respectively. According to the research findings, the optimal additional CaO amount of 15% exhibited the series’ highest compressive strength and lowest porosity.
Compressive strength, porosity, and density of mortar containing precipitated silica from Palm Oil Fuel Ash (POFA)
Authors: Olivia Monita , Wibisono Gunawan , Utama Panca Setia , Supit Steve 
Published: June 2023

Abstract
Palm Oil Fuel Ash (POFA) as an agro-industrial waste has potential applications in the construction industry. Using POFA to produce extracted precipitated silica is another step toward improving the performance of mortar and concrete with cost-effective biomass waste. This study investigates precipitated silica extracted from POFA as an additive for mortar. Mortar mixtures containing various percentages of precipitated silica (PS) and silica fume (SF) with 2%, 4%, and 6% by weight of cement were cast and studied. Compressive strength, porosity and density of the mortar at 28 days were tested to study the physical properties of the PCC-SP and PCC-SF mortars. The compressive strength of PCC-PS and PCC-SF mortars increased with the optimum 4% addition of silica. Precipitated silica mortar (PCC-PS) has lower strength, higher porosity, and similar density to the silica fume mortar (PCC-SF). However, the precipitated silica mortar has better strength, porosity, and density than the PCC mortar (control mix). The current findings suggest that the extracted precipitated silica can be used as a cost-effective additive from biomass waste to improve the performance of mortar and concrete.
The Use of Cationic Rapid Setting Emulsion Cold Asphalt Mixtures for Appropriate Road Rehabilitation
Authors: Setyawan A , Habiburrahman M , Sarwono D , Suryoto  , Rifai M , Budiarto A 
Published: June 2023

Abstract
This study aims to determine the Optimum Residual Asphalt Content in different aggregate sources and the characteristics of Cold Emulsion Asphalt Mixture if the gradation used is the National Asphalt Pavement Association (North Carolina) gradation. The aggregates used in this study came from PT. Pancadarma Puspawira, Surakarta and The Public Work Office Magetan District with the asphalt used is cationic emulsion asphalt type CRS-2. The emulsified asphalt content used for the Magetan mixture was 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, while the emulsified asphalt content for the Pancadarma mixture was 7.5%, 8.0%, 8.5%, 9.0%, 9.5%. The parameters reviewed in this study were density, VIM, VMA, VFB, stability, flow and Marshall Quotient with reference to the 2018 Highways Specification for repair overlay. The results showed that the emulsified asphalt mixture of CRS-2 Magetan and Pancadarma did not meet the specifications for repair overlay. The optimum emulsion asphalt content that is possible in the Magetan mixture is 8.0% with KARO 5.37% (stability 269.24 kg; density 2.04 gr/cc; VIM 5.71%; MQ 65.28 kg/mm; Flow 4.31 mm; VMA 18.39%; VFB 68.95 %). While the Pancadarma mixture is 9.5% with KARO (stability 70.07 kg; density 2.22 gr/cc; VIM 4.75%; MQ 23.31 kg/mm; Flow 3.05 mm; VMA 23.79%; VFB 80.03%).
Experimental study on foam concrete as a sub-base layer of rigid pavement
Authors: Harnedi Raihan Arditama , Rahman Harmein , Maizir Harnedi 
Published: June 2023

Abstract
Rigid pavement consists of three main layers, the base, sub-base and subgrade. Engineers mainly prefered choosing rigid pavement for heavy load road construction because the concrete mixture in this type of pavement has advantages in terms of strength, durability and design life. However, rigid pavement also has several disadvantages: relatively high construction and maintenance costs. As time goes by, researchers have developed several modified concrete mixtures; one of them is foam concrete. Foam concrete has strength similar to concrete in general but with a lighter mass and more affordable construction cost. This study examines foam concrete’s mechanical properties and properness as a sub-base layer on a rigid pavement. The research was conducted experimentally in the lab with five different densities of foam concrete mixture. The results showed that sample with a density of 1.0 g/cm3 has passed the minimum compressive and flexural strength values at 0.896 MPa and 0.0059 MPa respectively. This also indicates that increasing the density of a foam concrete mixture may increase its compressive and flexural strength but also lose its advantage of being a lightweight material as more density means more weight. Thus, it can be concluded that using foam concrete as a sub-base layer of rigid pavement is more advantageous in implementing rigid pavement construction.
The quality assurance factors that affect the product quality performance: A case of the building X construction project in Jakarta
Authors: Sihombing Lukas B. , Sumurung George A. 
Published: June 2023

Abstract
Quality is a goal in a project in addition to cost and time. The quality assurance program of a project functions to ensure that the process during the production period reaches the agreed upon quality targets. The finding of product defects in a building X construction project in Jakarta is the background of this research. The purpose of this study is to identify the quality assurance factors on the product quality performance, analyze the quality assurance factors on the product quality performance, and identify the quality assurance factors that contribute to the product quality performance in a building X construction project in Jakarta. The research methodology was quantitative in nature, starting by identifying the quality assurance factors through a literature study, validating the factors with expert respondents, conducting a survey by distributing questionnaires to respondents, and analyzing the survey results. From the results of this study, six quality assurance factors were found to affect the product quality performance of a building X construction project in Jakarta, namely monitoring and evaluating the work instruction procedure processes, having documents containing quality requirements set by the company and national/international quality standards, conducting quality assurance training programs for the staff, making recommendations for product improvements in project quality information reports, and establishing criteria for the production process.
A conceptual framework for integrating QSHE in construction
Authors: Silalahi Andreas Partogi , Widjajakusuma Jack , Tanuhendrata Michael Sofian , Suraji Akhmad 
Published: June 2023

Abstract
Construction accidents become catastrophic in infrastructure development. Evidence shows that quality failures such as system, services, procedural, materials, equipment, and human failures within the business process of project delivery systems are contributing causes of construction accidents that negatively impact worker safety, public safety, building/asset, and environmental safety. The standardized quality management systems and safety management systems in construction are fragmented. The Indonesian authorities have integrated the Quality Safety Health and Environment (QSHE) management system since 2018, but the implementation of the integrated QSHE system is still questionable. This paper aims to propose a framework and methodology for integrating QSHE implementation. The framework is based on the literature review of international standards and the UK Construction Design & Management Regulation. This proposal is a part of research currently formulated to develop an operating system to integrate quality and construction safety best practices in the project delivery systems. This paper addresses the quality management framework, safety management framework and, the proposed conceptual framework for integrating quality and safety management systems. The development of an integrated QSHE management system has the potential to save resources and eliminate redundancy significantly. Thus, an organization’s net production, profitability, and efficiency can significantly be increased. The results of this paper are 51 key points that are needed for integrating QSHE in construction projects. In the pre-construction stage, there are 24 key points, which are the largest portion. During the construction stage, there are 19 key points, and during the post-construction stage, there are 8 key points. So, it is very important to carry out the QSHE integration during the pre-construction stage to minimize the defects and accidents in construction projects.
Integrated analysis approach to structure PPP schemes for new infrastructure projects
Authors: Onishi T , Miyamoto K 
Published: June 2023

Abstract
When considering public–private partnerships (PPP) for new infrastructure development, it is necessary to structure a project scheme based on the financial analyses from the perspective of private businesses, bankability analyses of private finances from the perspective of lenders, and public expenditure analyses from the viewpoint of the public sector after satisfying the criteria of the economic analysis from the viewpoint of the national economy. Although these four analyses are closely related, it is difficult to structure a scheme from a comprehensive viewpoint because they are typically implemented individually. Therefore, this paper proposes an analytical approach that integrates economic, financial, bankability, and public expenditure to conduct a comparative evaluation of various business schemes, including PPP. First, the basic idea of an integrated analysis was explained in detail. After developing each analysis table on a spreadsheet, an integrated analysis table was derived by interconnecting the tables. In addition, using an integrated analysis table prepared for a virtual new toll road project, the usefulness of the integrated analysis approach for structuring the project scheme was confirmed through case studies.
Stakeholders’ readiness in implementing regulation on affordable public housing: a case study in Pemalang Regency, Central Java
Authors: Hermawan F , Prihantini A D , Suliantoro H 
Published: June 2023

Abstract
The lengthy licensing stage is becoming a problem in low-income housing development. Stakeholders’ readiness plays an essential role in the success factor of low-income housing. This study aims to identify the stakeholders’ readiness for regional autonomy in terms of policy implementation according to the Regulation of the Minister of Home Affairs Number 55 of 2017 concerning Low-Income Housing in Pemalang Regency. The research method adopted the policy model by Edwards III and the analytical hierarchy process (AHP). The determination of the criteria in this study was divided into four criteria: communication (human and financial) resources, implementers’ disposition/behaviour, and bureaucratic structure. These four criteria were analysed using the AHP method on eight respondents from one of the institutions related to the licensing stage. The findings suggested five strategies that could improve programs to accelerate the provision of low-income housing. The order of priority for those five strategies is: (1) capacity building of local authority staff; (2) improvement of the bureaucratic system and licensing services; (3) sanctions for parties affecting the licensing service process; (4) provision and dissemination of information; and (5) revision of regulations (Regulation of the Minister of Home Affairs).