Journal of Building Materials and Structures最新文献_第10页

Physicomechanical properties of nano-silica effect on geopolymer composites 纳米二氧化硅效应对地聚合物复合材料物理力学性能的影响

Journal of Building Materials and Structures Pub Date : 2016-05-03 DOI: 10.5281/ZENODO.242429

H. Khater

{"title":"Physicomechanical properties of nano-silica effect on geopolymer composites","authors":"H. Khater","doi":"10.5281/ZENODO.242429","DOIUrl":"https://doi.org/10.5281/ZENODO.242429","url":null,"abstract":"Addition of Nano-SiO2 (NS) to geopolymer composites has been studied through measurement of compressive strengths, Fourier Transformer Infra-Red (FTIR) and X-ray diffraction (XRD) analysis. Alumino–silicate materials are coarse aggregate included waste concrete and demolished walls with its cementing binder, cement kiln dust (CKD) used and can possess a pronouncing activation for the geopolymer reaction resulting from the high alkali contents within. Materials prepared at water/binder ratios in a range of 0.30: 0.40 under curing of 40 oC and 100% R.H, while the used activator is sodium hydroxide in the ratio of 2 wt. %. First, CKD is added in the ratio from 10 up to 50 wt., %, and the demolished walls was varied depending on the used CKD content, while using constant ratio of waste concrete (40 wt., %). Second step, depending on the optimum CKD ratio resulted from the first one (40 wt. %), so the control geopolymer mix composed of CKD, demolished walls and waste concrete in the ratio (40:20:40, wt %). NS partially replaced waste concrete by 1 up to 8%. Results indicated that, compressive strengths of geopolymer mixes incorporating NS were obviously higher than those control one, especially at early ages and specially with 3%NS.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71050321","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: 22

The effect of coal bottom ash (CBA) on mechanical and durability characteristics of concrete 粉煤灰(CBA)对混凝土力学性能和耐久性的影响

Journal of Building Materials and Structures Pub Date : 2016-05-03 DOI: 10.5281/ZENODO.242470

R. Khan, A. Ganesh

{"title":"The effect of coal bottom ash (CBA) on mechanical and durability characteristics of concrete","authors":"R. Khan, A. Ganesh","doi":"10.5281/ZENODO.242470","DOIUrl":"https://doi.org/10.5281/ZENODO.242470","url":null,"abstract":"The present paper would contribute to the efforts being made in the field of concrete technology towards development of concretes possessing good strength and durability properties along with economic and ecological advantage. In the present study it was found that with increase in amount of coal bottom ash, standard consistency, initial and final setting time increase at the same time workability of concrete decreases. Early age strength is less for bottom ash concrete compare to control mix, but as the age increases they show good improvement in strength due to pozzalanic reaction. Optimum dosage is observed to be 10% Grinded Bottom Ash (GBA) which shows about 14 % more strength compared to control mix at 56 days. Also 20% replacement by GBA gives results comparable to control concrete. GBA concrete shows more resistance to acid attack compared to Original Bottom Ash (OBA). Mix M7 with 30 % replacement by GBA shows highest resistance to acid attack. With the increase in amount of bottom ash water absorption capacity of concrete increases, also as the age increases for all the mix water absorption capacity decreases. It was also found that at optimum dosage i.e at 10% replacement of cement with GBA it is also economical and also less amount of CO2 is emitted that mean it is also environmental friendly compared to control mix.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71050370","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: 46

Effect of limestone powder as a partial replacement of crushed quarry sand on properties of self-compacting repair mortars 石灰石粉部分替代石料碎砂对自密实修补砂浆性能的影响

Journal of Building Materials and Structures Pub Date : 2016-05-03 DOI: 10.5281/ZENODO.242480

B. Benabed, H. Soualhi, A. Belaidi, Lakhdar Azzouz, E. Kadri, S. Kenai

{"title":"Effect of limestone powder as a partial replacement of crushed quarry sand on properties of self-compacting repair mortars","authors":"B. Benabed, H. Soualhi, A. Belaidi, Lakhdar Azzouz, E. Kadri, S. Kenai","doi":"10.5281/ZENODO.242480","DOIUrl":"https://doi.org/10.5281/ZENODO.242480","url":null,"abstract":"Self-compacting repair mortars (SCRM) are particularly desired for the rehabilitation and repair of reinforced concrete structures. The properties of SCRM can be improved by using chemical, mineral, polymer and fiber additives. In limestone quarries, considerable quantities of limestone fine powder are obtained during the process of crushing rock. These fine powders are being collected and their utilization is a big problem from the aspects of disposal, environmental pollution and health hazards. The introduction of limestone powder as cement and sand replacement present interesting possibilities to reduce the cement cost production, CO2 emission and the conservation of natural resources. The effects of limestone powder content in crushed sand on the properties of SCRM are not studied. An experimental study was undertaken to find out the effect of limestone powder content on fresh and hardened properties of SCRM. SCRM mixtures were prepared using crushed sand partially replaced with limestone powder at varying percentages up to 30%. Results indicate that the limestone powder as sand replacement significantly improves the fresh and hardened properties of SCRM with a content ranging from 10 to 15%. The use of limestone powder in repair mortar and concrete application would offer technical, economical and environmental advantages for concrete producers.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71050388","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: 17

Fresh and hardened properties of self-compacting concrete with different mineral additions and fibers 掺加不同矿物和纤维的自密实混凝土的新鲜和硬化性能

Journal of Building Materials and Structures Pub Date : 2016-03-04 DOI: 10.5281/ZENODO.242152

N. Haddadou, R. Chaid, Y. Ghernouti, Naima Adjou, Malik Bouzoualegh

引用次数: 13

Experimental investigation of the performance of palm kernel shell and periwinkle shell as partial replacement for coarse aggregate in asphaltic concrete 棕榈仁壳和长春花壳在沥青混凝土中部分替代粗集料性能的试验研究

Journal of Building Materials and Structures Pub Date : 2016-03-04 DOI: 10.5281/ZENODO.242128

O. Oyedepo, E. O. Olukanni

{"title":"Experimental investigation of the performance of palm kernel shell and periwinkle shell as partial replacement for coarse aggregate in asphaltic concrete","authors":"O. Oyedepo, E. O. Olukanni","doi":"10.5281/ZENODO.242128","DOIUrl":"https://doi.org/10.5281/ZENODO.242128","url":null,"abstract":"Performance of non-conventional materials namely palm kernel shell (PKS) and periwinkle shell (PWS) were investigated. Sieve analysis, aggregate impact value (AIV), aggregate crushing value (ACV), bitumen penetration, Marshall Stability, flash and fire point were carried out in accordance with American Standard for Materials and Testing (ASTM) and British Standard (BS) specifications. A total of thirty-six samples were prepared by partially replacing coarse aggregate with PKS and PWS at 0%, 10%, 20%, 30%, 40% and 50%. The AIV and ACV values of 35.85% and 11.49% were obtained for PWS, while 6.42% and 9.22% respectively were obtained for PKS; this is usable for wearing course. The 10% partial replacement with PWS has Marshall Stability value of 2.33kN; 10% and 20% partial replacement with PKS has Marshall Stability values of 3.0kN and 2.2kN respectively, while 10%, 20% and 30% partial replacement with combination of PWS and PKS has Marshall Stability values of 3.22kN, 2.41kN and 2.21kN respectively; thus satisfying the requirement for light traffic road. Also, 10% and 20% partial replacement with the combination of PWS and PKS gives a flow value of 8.9 mm and 8.5 mm which can be used for light traffic. Hence, 10% to 20% partial replacement of coarse aggregate with PWS and PKS can be used as alternative material in asphaltic concrete to reduce the cost of construction.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71050526","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: 4

Self-compactibility of flowing sand-concrete containing dune sand and marble powder 流砂的自密实性——含沙丘砂和大理石粉的混凝土

Journal of Building Materials and Structures Pub Date : 2015-01-30 DOI: 10.5281/ZENODO.242016

T. Bouziani

引用次数: 0

Performance of coconut shell ash and palm kernel shell ash as partial replacement for cement in concrete 椰壳灰和棕榈仁灰在混凝土中部分替代水泥的性能

Journal of Building Materials and Structures Pub Date : 2015-01-30 DOI: 10.5281/ZENODO.241986

O. Oyedepo, L. M. Olanitori, Sumbo Philip Akande

引用次数: 25

Effect of bentonite on the saturated hydraulic conductivity of landfill liners based on dune sand 膨润土对沙丘砂填埋衬垫饱和导电性的影响

Journal of Building Materials and Structures Pub Date : 2015-01-30 DOI: 10.5281/ZENODO.241972

M. K. Gueddouda, I. Goual, S. Taibi, N. Abou-Bekr, M. Lamara

引用次数: 0

Comparative performance of isolated and fixed-base reinforced concrete structures 隔震与固定基钢筋混凝土结构性能比较

Journal of Building Materials and Structures Pub Date : 2015-01-08 DOI: 10.5281/ZENODO.241967

Naima Adjou, N. Haddadou

引用次数: 0

Effect of the heat curing on strength development of ultra-high performance fiber reinforced concrete (UHPFRC) containing dune sand and ground brick waste 热养护对含沙丘砂和磨砂砖废料的超高性能纤维增强混凝土强度发展的影响

Journal of Building Materials and Structures Pub Date : 2014-06-06 DOI: 10.5281/ZENODO.241939

B. Safi, Amel Aboutair, M. Saidi, Y. Ghernouti, C. Oubraham

{"title":"Effect of the heat curing on strength development of ultra-high performance fiber reinforced concrete (UHPFRC) containing dune sand and ground brick waste","authors":"B. Safi, Amel Aboutair, M. Saidi, Y. Ghernouti, C. Oubraham","doi":"10.5281/ZENODO.241939","DOIUrl":"https://doi.org/10.5281/ZENODO.241939","url":null,"abstract":"This work aims to investigate the strength development of ultra-high performance fiber reinforced concrete (UHPFRC) containing ground dune sand (GDS) and ground brick waste (GWB) as a substitutions of cement and dune sand (DS) as an aggregate. The variables are the nature of addition (GDS and GWB) in the binder and the heat curing at different temperatures (20°C and 60°C) at 7 days of curing. Two temperatures 20°C and 60 °C were applied to samples with intermediate levels for 8 hours in total. In this study, two types of cements (CEMI and CEMII) were used to prepare UHPFRC. The GWB was replaced by GDS at levels of 10, 20 and 30% by weight. The results show that the obtained concretes develop a high mechanical performance with a suitable heat treatment according to the cement type and the used fiber. The compressive strength at 7 days of UHPFRC has increased with heat curing (at 60 °C) compared to that obtained at 28 days and measured at 20 °C. Results show also that values of compressive strength of concrete containing DS are close to those obtained by the control concrete. This study has showed that the dune sand can be used in UHPRC, and that the substitution of the GWB by GDS can provide concretes with acceptable mechanical performance.","PeriodicalId":33130,"journal":{"name":"Journal of Building Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71050508","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: 5