{"title":"煤炭底灰混凝土的剪切强度表征和可持续性评估","authors":"Nitin Ankur, N. Singh","doi":"10.1139/cjce-2023-0307","DOIUrl":null,"url":null,"abstract":"The present study investigated the synergistic influence of coal bottom ash (CBA) on the shear strength of concrete. CBA was milled for 2,6, and 10 hours to form grinded CBA (GCBA). ‘L’ shaped specimens were prepared with 10-30% GCBA and 25-50% CBA as alternative of Portland cement (PC) and natural fine aggregates (NFA). Concrete containing 20% GCBA (grinded for six hours) and 25% CBA reported the highest shear strength owing to pozzolanic reactiveness and filler action. X ray diffraction (XRD), scanning electron microscopy- energy-dispersive spectroscopy (SEM-EDS) and Fourier transform infrared (FT-IR) also supported the experimental outcomes. Well fitted mathematical models were derived followed by optimization using desirability function approach recommending 5.71 hours of grinding, 26.27% GCBA and 36.69% CBA as the optimum amount for its successful utilization in concrete. This approach further leads to significant reduction of about 22% in carbon footprints and eco-costs in comparison to conventional concrete.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Shear Strength Characterization and Sustainability Assessment of Coal Bottom Ash Concrete\",\"authors\":\"Nitin Ankur, N. Singh\",\"doi\":\"10.1139/cjce-2023-0307\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The present study investigated the synergistic influence of coal bottom ash (CBA) on the shear strength of concrete. CBA was milled for 2,6, and 10 hours to form grinded CBA (GCBA). ‘L’ shaped specimens were prepared with 10-30% GCBA and 25-50% CBA as alternative of Portland cement (PC) and natural fine aggregates (NFA). Concrete containing 20% GCBA (grinded for six hours) and 25% CBA reported the highest shear strength owing to pozzolanic reactiveness and filler action. X ray diffraction (XRD), scanning electron microscopy- energy-dispersive spectroscopy (SEM-EDS) and Fourier transform infrared (FT-IR) also supported the experimental outcomes. Well fitted mathematical models were derived followed by optimization using desirability function approach recommending 5.71 hours of grinding, 26.27% GCBA and 36.69% CBA as the optimum amount for its successful utilization in concrete. This approach further leads to significant reduction of about 22% in carbon footprints and eco-costs in comparison to conventional concrete.\",\"PeriodicalId\":9414,\"journal\":{\"name\":\"Canadian Journal of Civil Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Canadian Journal of Civil Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1139/cjce-2023-0307\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Journal of Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1139/cjce-2023-0307","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
Shear Strength Characterization and Sustainability Assessment of Coal Bottom Ash Concrete
The present study investigated the synergistic influence of coal bottom ash (CBA) on the shear strength of concrete. CBA was milled for 2,6, and 10 hours to form grinded CBA (GCBA). ‘L’ shaped specimens were prepared with 10-30% GCBA and 25-50% CBA as alternative of Portland cement (PC) and natural fine aggregates (NFA). Concrete containing 20% GCBA (grinded for six hours) and 25% CBA reported the highest shear strength owing to pozzolanic reactiveness and filler action. X ray diffraction (XRD), scanning electron microscopy- energy-dispersive spectroscopy (SEM-EDS) and Fourier transform infrared (FT-IR) also supported the experimental outcomes. Well fitted mathematical models were derived followed by optimization using desirability function approach recommending 5.71 hours of grinding, 26.27% GCBA and 36.69% CBA as the optimum amount for its successful utilization in concrete. This approach further leads to significant reduction of about 22% in carbon footprints and eco-costs in comparison to conventional concrete.
期刊介绍:
The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.