Journal of Building Materials and Structures最新文献_第2页

Pozzolanic Properties of White Cowpea Husk Ash 白豇豆壳灰的火山灰性质

Journal of Building Materials and Structures Pub Date : 2021-12-31 DOI: 10.34118/jbms.v8i2.1375

U. Wilson, Gambo Z, Mohammed I S, E. O. C., O. S. O.

{"title":"Pozzolanic Properties of White Cowpea Husk Ash","authors":"U. Wilson, Gambo Z, Mohammed I S, E. O. C., O. S. O.","doi":"10.34118/jbms.v8i2.1375","DOIUrl":"https://doi.org/10.34118/jbms.v8i2.1375","url":null,"abstract":"This research attempts to empirically investigate the pozzolanic properties of White Cowpea Husk Ash (WCHA), an agricultural biomass waste, at different percentages of its use as partial replacement of cement in concrete. WCHA was obtained after the calcination of white cowpea husk for 3 hours at 5500C. X-ray Florescence (XRF) analysis performed revealed that the sample of WCHA is a Class C pozzolana, which contains 65.4% of the combination of SiO2, Al2O3, and Fe2O3. The WCHA shows increase in consistency with increase in the WCHA content. This was attributed to the high Loss of Ignition (LOI) of WCHA compared to that of the cement. In addition, the results indicated that the initial and final setting time of WCHA – Cement blended concrete increase with increase in the WCHA content. The delay in setting times of WCPA-Cement paste could be attributable to the slower pozzolanic reaction. The density of the concrete decreased as the WCHA content increases. Generally the compressive strength of the WCHA concrete increased with increase in curing age and decreases as the WCHA content increased from a strength of 28.6 to 20.0 N/mm2 giving a percentage reduction of 30.1 %. The strength reduction is also attributed to the modification of the bonding properties of the binders’ hydrates. However, the 28 days compressive strength of concrete with up to 10 % WCHA content (26.4 N/mm2) satisfied the design characteristic strength of 25 N/mm2. Beyond this limit, the compressive strength of the concrete fell below the design strength. Hence, 10 % WCHA could be regarded as the optimum dose for grade 25 concrete.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48310223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

ANN modelling approach for predicting SCC properties - Research considering Algerian experience. Part III. Effect of mineral admixtures 预测SCC特性的人工神经网络建模方法——考虑阿尔及利亚经验的研究。第三部分矿物掺合料的作用

Journal of Building Materials and Structures Pub Date : 2021-12-31 DOI: 10.34118/jbms.v8i2.1080

M. Sahraoui, T. Bouziani

引用次数: 1

The High-Speed Railway Bridges Under Vehicle Moving Load And Near Fault Seismic Ground Motions – Review. 高速铁路桥梁在车辆移动荷载和近断层地震动作用下的研究进展。

Journal of Building Materials and Structures Pub Date : 2021-12-31 DOI: 10.34118/jbms.v8i2.1288

Amudhan Vijayakumar, Hui Qian

{"title":"The High-Speed Railway Bridges Under Vehicle Moving Load And Near Fault Seismic Ground Motions – Review.","authors":"Amudhan Vijayakumar, Hui Qian","doi":"10.34118/jbms.v8i2.1288","DOIUrl":"https://doi.org/10.34118/jbms.v8i2.1288","url":null,"abstract":"All-time needs of maintenance of high-speed train system and its infrastructure safety are must all over the world. Nowadays, for the smooth running of HSR trains, most of the country depends on the HSR bridge structures, but there is still a lack of understanding of the behavior of structures under various factors like seismic and high speed moving load effects. To study the dynamic behavior of HSR bridges, it is important to consider the interaction of moving vehicle – Bridge structure – Ground surface showing that the different parameters involved in understanding the response of the structure. The main motivation of this study is to initiate a better understanding of the various parameters effects by those seismic and moving vehicles over the dynamic behavior of the HSR bridges. The effects of forwarding directivity pulses were considered to understand the behavior of HSR bridges against near-fault earthquakes, which can make a substantial impact on the seismic demand capacity of the moving vehicles and structures. The effects of high-speed moving vehicles over the HSR bridges to understanding the parameters involved in the dynamic behavior of the coupled system. This literature review can help the beginners and who initiate the study based on the dynamic behavior of high-speed railway bridges and their components under seismic and moving load effects. \u0000 ","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45455354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of bottom ash as part replacement of sand for making concrete blocks 用底灰代替部分砂子制造混凝土砌块

Journal of Building Materials and Structures Pub Date : 2021-07-05 DOI: 10.5281/ZENODO.5062627

SatishK. Sharma, Vipin Arora, P. Ojha, Brijesh Singh, V. Patel, S. AdarshKumarN

{"title":"Use of bottom ash as part replacement of sand for making concrete blocks","authors":"SatishK. Sharma, Vipin Arora, P. Ojha, Brijesh Singh, V. Patel, S. AdarshKumarN","doi":"10.5281/ZENODO.5062627","DOIUrl":"https://doi.org/10.5281/ZENODO.5062627","url":null,"abstract":"Coal-based thermal power plants all over the world facing serious problems of handling and disposal of the ash produced. The productive use of coal Bottom Ash (BA) is the best way to alleviate the problems associated with its disposal. This paper covers the studies on laboratory scale evaluation of vibro compaction concrete blocks using BA I, BA II & BA III collected from three different location of Coal Fed Thermal Power Station. In the present investigation laboratory investigation have been carried to utilize BA as part replacement of sand in concrete. This study cover manufacture of concrete blocks without flyash & with BA using for making solid block as per specification laid down in IS:2185 using vibro compaction machine. Three different sources of BA were used in concrete mix each @ 30%, 40% & 50% replacement by weight of sand were adopted in making concrete blocks. Comparative study of compressive strength of concrete at different age of curing, wet density, drying shrinkage is reported in this study. Wet density is found to be lower in blocks containing BA & dry shrinkage values are found well within the limits of specifications. Concrete Blocks having BA @ 30% by weight of sand are found suitable for use in the manufacture of concrete blocks.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43859077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A case study on deterioration assessment and rehabilitation of fire damaged reinforced concrete structure 火灾损伤钢筋混凝土结构劣化评估与修复实例研究

Journal of Building Materials and Structures Pub Date : 2021-07-01 DOI: 10.5281/ZENODO.5044240

N. OjhaP, S. AdarshKumarN, Brijesh Singh, Abhishek Singh, V. Patel

{"title":"A case study on deterioration assessment and rehabilitation of fire damaged reinforced concrete structure","authors":"N. OjhaP, S. AdarshKumarN, Brijesh Singh, Abhishek Singh, V. Patel","doi":"10.5281/ZENODO.5044240","DOIUrl":"https://doi.org/10.5281/ZENODO.5044240","url":null,"abstract":"Fire is one of the most severe hazards that building structures may experience during their lifetime. A fire spread to the whole structure can cause unexpected damages to the structural elements. Mainly, the building type is crucially important for the type and the level of damage to the building because of the fire. Post fire investigation of damaged structure is required to determine the extent of damage to concrete elements and to work out system of effective repair/rehabilitation measures to maintain the structural integrity of fire effected structural components. The paper covers in brief the strength and durability study on fire damaged building in Delhi, India. The study reports the extent of fire damage. Optical Microscopy (OM), X-Ray Diffraction (XRD) and Deferential Thermal Analysis (DTA) studies were carried out on the sample concrete cores extracted from different identified portions of the fire exposed concrete are highlighted in this paper. Extent of damage occurred in the Reinforced Cement Concrete (RCC) i.e. RCC columns/beams/slabs are described based on the detailed evaluation by various Non-Destructive Evaluation Techniques covering Cover study & Ultrasonic Pulse Velocity (UPV) testing. Repair and remedial measures required for restoration and strengthening of the fire affected RCC columns/beams/slabs using indigenously available repair materials and techniques are also highlighted in this paper.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48558731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANN modelling approach for predicting SCC properties - Research considering Algerian experience .Part II. Effects of aggregates types and contents 预测SCC特性的人工神经网络建模方法——考虑阿尔及利亚经验的研究。第二部分。骨料类型和含量的影响

Journal of Building Materials and Structures Pub Date : 2021-06-29 DOI: 10.5281/ZENODO.5039914

M. Sahraoui, T. Bouziani

{"title":"ANN modelling approach for predicting SCC properties - Research considering Algerian experience .Part II. Effects of aggregates types and contents","authors":"M. Sahraoui, T. Bouziani","doi":"10.5281/ZENODO.5039914","DOIUrl":"https://doi.org/10.5281/ZENODO.5039914","url":null,"abstract":"The objective of this investigation is to illustrate the effect of aggregates types and contents on fresh and hardened properties of self-compacting concrete (SCC) considering Algerian experience. Based on experimental data available in the literature, Artificial neural network (ANN) models are established to illustrate the variation of aggregate types and contents (sand and gravel) in binary and ternary contour plots. Modelling results concerning the effect of sand types and proportions in binary and ternary combinations show the beneficial effect of river sand (RS) and crushed sand (CS) on slump flow. The highest L-Box ratio was obtained for mixtures composed of 50% of both RS and CS for binary and ternary mixtures. The increase in CS content enhance static stability, while the increase in RS gives higher compressive strength at 28 days. Concerning the study of aggregate sizes and contents, it was found that the increase of sand content leads to an increase in flowability and a decrease in static stability. An increase in gravel content leads to a decrease in passing ability, while a significant improvement in viscosity, static stability and mechanical strength with an increase in gravel content were observed.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49604788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical investigation to reduce environmental emissions from manufacturing industries 减少制造业环境排放的数值研究

Journal of Building Materials and Structures Pub Date : 2021-03-22 DOI: 10.5281/ZENODO.4625345

H. Miloua

引用次数: 1

Study of the mechanical behavior of dune sand treated by hydraulic binders: application in the road geotechnical field 水硬性粘结剂处理沙丘砂的力学性能研究——在公路岩土工程领域的应用

Journal of Building Materials and Structures Pub Date : 2021-03-22 DOI: 10.5281/ZENODO.4624359

A. Smaida, S. Haddadi, A. Nechnech

引用次数: 0

Exploration of prefabricated building system in housing construction 装配式建筑体系在住宅建设中的探索

Journal of Building Materials and Structures Pub Date : 2021-02-26 DOI: 10.5281/ZENODO.4567209

N. Gupta, M. Kamal, T. S. Brar

{"title":"Exploration of prefabricated building system in housing construction","authors":"N. Gupta, M. Kamal, T. S. Brar","doi":"10.5281/ZENODO.4567209","DOIUrl":"https://doi.org/10.5281/ZENODO.4567209","url":null,"abstract":"The main purpose of this paper is to examine the development and current status of prefabrication techniques and their application in building construction and why its use is still limited in the housing sector in India and why prefabrication is not being used so far to provide affordable housing to all. Prefabrication is the practice of assembling components of a structure in factories, and then transporting the complete assemblies or sub-assemblies to the construction site where the structure is to be located. The important aspect is how much of a potential difference it can establish so that appropriate development can be implemented. This paper reviews the current prefabrication system scenario for housing in India. The paper begins with a brief introduction about different types of prefabrication system. Subsequent topics address the need of prefabrication and ethical dilemma of technology transfer for prefabricated building system in India. In this paper, a qualitative descriptive evaluation research method has been used. The research methodology comprises of case studies, visual observation and data collection. Finally, two case studies around the world have been presented to validate and illustrate the various modern trends and application of design and construction methods of prefabricated building system in housing.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48822662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A case study of foundation failure of a residential building: From diagnosis to reparation 某住宅楼地基破坏案例分析:从诊断到修复

Journal of Building Materials and Structures Pub Date : 2021-01-19 DOI: 10.5281/ZENODO.4281291

A. Merah

{"title":"A case study of foundation failure of a residential building: From diagnosis to reparation","authors":"A. Merah","doi":"10.5281/ZENODO.4281291","DOIUrl":"https://doi.org/10.5281/ZENODO.4281291","url":null,"abstract":"The pathology that appears in reinforced concrete structures, old and new, is inevitable and involves all stakeholders at all levels of responsibility, from the technician to the decision maker at the highest level. It also concerns engineers from design offices and experts from offices responsible for diagnosing existing structures, as well as engineers from repair companies. Like all countries in the world, the study of the pathology and safety of civil engineering buildings is one of the big problems encountered in the field of construction in Algeria. The foundations are among of the structural elements of the buildings most affected by this damage, these constitute the link between the structure and the soil, they allow the transmission of loads from the structure to the soil. If these structural elements are damaged, they affect the general stability of the building. Depending on the severity of the damage, it can cause the building collapse. The main objective of this paper is to study a pathological case of foundation failure of a residential building: from diagnosis to reparation. This repair was carried out according to an intervention plan comprising stages spread over time, this allowed the strengthening of the infrastructure and gave the building an acceptable level of security.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42461484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0