Journal of Building Materials and Structures最新文献_第3页

Geopolymer Cement: an Initiative towards the Replacement of Grey Cement by Green Cement in Future 地质聚合物水泥：未来绿色水泥替代灰色水泥的举措

Journal of Building Materials and Structures Pub Date : 2021-01-18 DOI: 10.34118/jbms.v8i1.783

M. Mukesh Kumar, K. Asis Kumar

{"title":"Geopolymer Cement: an Initiative towards the Replacement of Grey Cement by Green Cement in Future","authors":"M. Mukesh Kumar, K. Asis Kumar","doi":"10.34118/jbms.v8i1.783","DOIUrl":"https://doi.org/10.34118/jbms.v8i1.783","url":null,"abstract":"The emissions of greenhouse gases such as carbon dioxide from the production of Ordinary Portland Cement and Blended Portland Cement have widely affected the environment with increase in infrastructure development worldwide. Secondly, due to the continuous mining of limestone for the production of cement there is also simultaneous depletion of natural resources and hardly will it last up to maximum 40 years. Hence we need to switch over to some other alternate binders for constructions purpose in future. Geopolymer Cement is one of the inventions which is produced by a polymeric chain reaction of alkali-activated alumino-silicate materials better known as alkali activator (NaOH/Na2SiO3) binders with the industrial by-product materials such as Fly Ash, Rice Husk Ash, Slag, Crusher Dust etc. and provides high compressive strength which is comparable to BPC and reduces the carbon foot print. The objective of our study is to prepare the low CO2 foot print green Geopolymer Cement which may substitute the Ordinary Portland Cement and Blended Portland Cement in future and will helpful to reduce the greenhouse effect up to some extent and takes an initiative towards the green revolution movement.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46971259","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

Experimental Investigation of the Effect of Sisal Fiber on the Partially Replaced Cement with Groundnut Shell Ash in Concrete 剑麻纤维对花生壳灰部分替代水泥的影响的试验研究

Journal of Building Materials and Structures Pub Date : 2021-01-12 DOI: 10.5281/ZENODO.4432898

J. Sani, J. Afolayan, U. Wilson, Ochiagha I. Eze, J. Nyeri

引用次数: 2

An investigation into tensile structure system: construction morphology and architectural interventions 张力结构体系的研究:建筑形态与建筑干预

Journal of Building Materials and Structures Pub Date : 2020-12-13 DOI: 10.34118/jbms.v7i2.776

Mohammad Arif Kamal

引用次数: 1

Pervious concrete, plastic concrete and controlled low strength material- a special applications concrete 透水混凝土、塑性混凝土和可控低强度材料-一种特殊应用混凝土

Journal of Building Materials and Structures Pub Date : 2020-12-07 DOI: 10.5281/ZENODO.4308048

N. OjhaP, Suresh Kumar, Brijesh Singh, N. Mohapatrab

{"title":"Pervious concrete, plastic concrete and controlled low strength material- a special applications concrete","authors":"N. OjhaP, Suresh Kumar, Brijesh Singh, N. Mohapatrab","doi":"10.5281/ZENODO.4308048","DOIUrl":"https://doi.org/10.5281/ZENODO.4308048","url":null,"abstract":"The paper presents the study carried out for three special concretes like Pervious Concrete, Plastic Concrete and Controlled Low Strength Materials (CLSM) using locally available materials. Pervious concrete is a concrete with high porosity. It is used in a wide range of applications including pervious pavements and helps in improving pavement skid resistance and reducing hydroplaning. This concrete was designed to meet the requirement of 28-day compressive strength of 10 MPa and water permeability of 0.50 cm/sec. Plastic concrete has low compressive strength but higher ductility and lower permeability. It is used for creating an impermeable barrier (cut-off wall) for containment of contaminated sites or seepage control in highly permeable dam foundations. This concrete was designed to meet the requirement of 28-day unconfined compressive strength of 1.5 to 2.5 MPa and confined compressive strength of 2.5 to 3.5 Mpa at confining pressure of 4 Kg/cm2. Controlled Low Strength Material (CLSM) or flowable fill mixtures are typically specified and used in place of compacted fill especially for backfill, utility bedding, void fill and bridge approaches. CLSM is a self-compacting, flowable, low strength cementitious material which suits the requirement of different applications such as excavatable backfill and structural backfill. The properties of CLSM that were investigated included bleeding, density of hardened CLSM, permeability and unconfined compressive strength at 7 days and 28 days age.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47337840","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

Production of Green Cement from Slag Enhanced by Egyptian Metakaolin Materials 埃及偏高岭土增强矿渣生产绿色水泥

Journal of Building Materials and Structures Pub Date : 2020-10-31 DOI: 10.34118/jbms.v7i2.770

Abdeen M. El Nagar

{"title":"Production of Green Cement from Slag Enhanced by Egyptian Metakaolin Materials","authors":"Abdeen M. El Nagar","doi":"10.34118/jbms.v7i2.770","DOIUrl":"https://doi.org/10.34118/jbms.v7i2.770","url":null,"abstract":"New geopolymer-based materials offer excellent perspectives for the future; they should not be regarded as competitive materials for Portland cement, which has been the reference construction material for so long, but as alternative materials with a series of important advantages to be considered. Metakaolin (MK) produced from firing kaolin material up to 750 ºC for 2 h with a heating rate of 5ºC/min; leads to an enhancement in mechanical and microstructural properties of alkali activated geopolymer of water cooled slag material using (6:6, wt%) of sodium hydroxide and sodium silicate. In the present work the ratios of MK which will be added are less than 20% of the total mass, because of the used MK was very fine with average pore structure less than 30 mµ, which hinders the geopolymerization reaction if used as high ratio. Curing was performed under 100% relative humidity at a temperature of 38ºC and ages of 7, 14, 28 & 90 days. The properties of geopolymer specimens have been studied through measurement of XRD, SEM imaging, FTIR, compressive strength and water absorption. Results showed that the mixes of metakaolin up to 15% results in an enhancement in the mechanical properties as compared with slag control mix up to 90 days.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48367755","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

Behavior of self- compacting concrete incorporating calcined pyrophyllite as supplementary cementitious material 煅烧叶蜡石作为辅助胶凝材料的自密实混凝土性能

Journal of Building Materials and Structures Pub Date : 2020-10-19 DOI: 10.5281/ZENODO.4005645

S. Mansour

{"title":"Behavior of self- compacting concrete incorporating calcined pyrophyllite as supplementary cementitious material","authors":"S. Mansour","doi":"10.5281/ZENODO.4005645","DOIUrl":"https://doi.org/10.5281/ZENODO.4005645","url":null,"abstract":"The current trend of industrial concrete leans more towards the use of self-compacting concrete. These must have fresh properties well defined as fluidity, filling ability and resistance to segregation. However, to ensure the rheological stability, use mineral fines is required. In this work, powder of calcined pyrophyllite (CP) was used as cement substitution at level of 10% and 20% by weight. The interest is focused on the role played by the calcined pyrophyllite to produce SCC with reduced impact environmental.. Calcination of pyrophyllite powder was carried out at 750 °C. Its effect on the workability and mechanical properties of self-compacting concrete is analyzed. The results show that the properties of workability of SCC containing 10% of calcined pyrophyllite tested at fresh state (Slump Flow, T50, passing ability and segregation resistance) are almost identical to those of the control SCC. Furthermore, the calcined pyrophyllite increases the compressive strength, tensile and flexural strength of SCC approaching without exceeding those of the control SCC. It seems that 10 % of calcined pyrophyllite is the optimum replacement rate which improves mechanical strength compared to 20%. Replacing cement with the calcined pyrophyllite aims to save cement and reduce the CO2 emissions released during the manufacture of cement.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48611911","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: 2

Effect on mechanical properties and stress strain characteristics of normal and high strength concrete at elevated temperature 高温下对普通高强混凝土力学性能和应力应变特性的影响

Journal of Building Materials and Structures Pub Date : 2020-10-12 DOI: 10.5281/ZENODO.4077425

V. Patel, Brijesh Singh, P. Ojha, B. Mohapatra

{"title":"Effect on mechanical properties and stress strain characteristics of normal and high strength concrete at elevated temperature","authors":"V. Patel, Brijesh Singh, P. Ojha, B. Mohapatra","doi":"10.5281/ZENODO.4077425","DOIUrl":"https://doi.org/10.5281/ZENODO.4077425","url":null,"abstract":"High strength concrete (HSC) has some disadvantages such as brittleness and poor resistance to fire. Fire exposure affects the concrete in way that the disintegration of concrete starts and a severe surface spalling occurs at very high temperatures. Therefore, the structural behaviour or response to the load will change after fire exposure and the structural members may not behave as they were designed. Further, the basics of flexural design depend on the stress- strain response of the concrete which is also affected upon fire exposure. Hence, this study is carried out to provide useful input to aid the provision of a fire resistance for structural behaviour of concrete by investigating the effects on mechanical properties of concrete after exposure to high temperatures up to 600°C and establishing a stress-strain relationship. The concrete cylinders of size 100 mm x 200 mm were exposed to the temperature of 2000C, 4000C and 6000C after which the residual compressive strength, split tensile strength and flexural strength were recorded. For stress strain characteristics, 100 × 200 mm cylinders with polypropylene fiber content of 0.5% by volume of concrete were subjected to temperature exposure of 6000C for durations of 1 hour. Curves for reduction factors of strength and stress strain characteristics after fire/elevated temperature exposure has been established. Just consideration of reduced strength for assessment after fire exposure will not serve the purpose as the change in load response and increased deformation capacity also needs to be addressed properly.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42376273","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

Influence of segregation on the performance of self-compacting concrete in the fresh and hardened states 离析对自密实混凝土新龄期和硬化期性能的影响

Journal of Building Materials and Structures Pub Date : 2020-10-09 DOI: 10.5281/ZENODO.4072328

M. Bouabdallah, Rachida Mohammed Krachaï

{"title":"Influence of segregation on the performance of self-compacting concrete in the fresh and hardened states","authors":"M. Bouabdallah, Rachida Mohammed Krachaï","doi":"10.5281/ZENODO.4072328","DOIUrl":"https://doi.org/10.5281/ZENODO.4072328","url":null,"abstract":"The granular mixture represents one of most important parameters in the formulation of self-compacting concretes in order to achieve a representative granular distribution. A good resistance to segregation results in a regular distribution of the different sizes of the aggregates in all parts of the element, with the same granule density. The granular mixture must be homogeneous and representative, and has to be able to flow in the absence of dynamic and static segregation.The main objective of the present research is to study the influence of segregation on the performance of Self-compacting concrete in the fresh and hardened state, by determining the static segregation index according to the percentage of aggregates of class G 8/15 and that of aggregates of class G 3/8 in order to obtain a homogeneous granular mixture, whatever the volume of self-compacting concrete to be prepared. It is well acknowledged that the threshold of the discontinuation of granular mixing represents a new element with respect to segregation in concrete. The obtained results showed that the percentage of large aggregates has a significant influence on the segregation index and the performance of self-compacting concrete (SCC) at 28 days.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44573179","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 I. Development and analysis of models 预测SCC属性的人工神经网络建模方法-考虑阿尔及利亚经验的研究。第一部分:模型的开发与分析

Journal of Building Materials and Structures Pub Date : 2020-10-09 DOI: 10.5281/ZENODO.4074773

M. Sahraoui, T. Bouziani

{"title":"ANN modelling approach for predicting SCC properties - Research considering Algerian experience. Part I. Development and analysis of models","authors":"M. Sahraoui, T. Bouziani","doi":"10.5281/ZENODO.4074773","DOIUrl":"https://doi.org/10.5281/ZENODO.4074773","url":null,"abstract":"This paper presents research on the use of artificial neural networks (ANNs) to predict fresh and hardened properties of self compacting concrete (SCC) made with Algerian materials. A multi-layer perceptron network with 5 nodes, 12 inputs, and 5 outputs is trained and optimized using a database of 167 mixtures collected from literature. The inputs for the ANN models are ordinary Portland cement (Cm), polycarboxylate ether superplasticizer (Sp), river sand (RS), crushed sand (CS), dune sand (DS), Gravel 3/8 (G1), Gravel 8/15 (G2), Water (W), Limestone filler (Lim), Marble powder (MP), blast furnace slag (Slag) and natural pozzolan (Pz). Instead, Slump flow (Slump), V-funnel, L-Box, static stability (Pi) and 28 days compressive strength (Rc28) were the outputs of the study. Results indicate that ANN models for data sets collected from literature have a strong potential for predicting 28 days compressive strength. Slump flow, V-funnel time and L-Box ratio could be moderately identified while an acceptable prediction has been obtained for static stability. Results have also confirmed by statistical parameters, Regression plots and residual analysis.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48564290","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: 2

Experimental characterisation and numerical modelling of the resilient behaviour of unbound granular materials for roads 道路用松散颗粒材料弹性特性的实验表征和数值模拟

Journal of Building Materials and Structures Pub Date : 2020-09-27 DOI: 10.5281/ZENODO.4052674

K. Sandjak, M. Ouanani, B. Tiliouine

引用次数: 1