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标题：The Non-Carbon Kaolinite; Part Substituent of Cement in Concrete
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作者：Barun Harichandan ; Siba Prasad Mishra ; Deepak Kumar 等
期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2022
卷号：41
期号：1
页码：1-13
DOI：10.9734/cjast/2022/v41i131643
语种：English
出版社：Sciencedomain International
摘要：Concrete extravagantly used as an anthropogenic building material, unabated in urban development. Globally the cement sector emits about 8% of CO2 (Carbon Dioxide), generated at a ratio of 1MT of CO2 per1MT of cement clinker sintering. Environmental concerns for its degradation through cement. To restrict cement production, natural clay materials and industrial refuges are in to substitute cement part or whole. The present-day hunt is the usage of Metakaolin (MK), a copiously accessible clay in India, as a substituent for cement. The physical, chemical, and mechanical properties of the metakaolin concrete investigated using XRF spectrometer, Scanning Electron Microscopy and universal testing machine following laboratory procedures. The efficiency of MK-concrete at different percentage mixes (0-30%) of ordinary Portland cement replacement at water-cement ratio 0.48 for all the mixes observed. The results suggested that concrete strength reduced significantly during the initial hydration period, particularly at high MK content. The application of up to 15% MK beyond 28 days curing triggers initial setting, time, rises in concrete strength, and increases durability and is also not affected by alkali-silica gel reaction, chloride and sulphate attack. Depending on the age of curing and the MK-concrete durability increases. This work shall reduce the carbon burden of present atmosphere if 15% blended MK cement concrete used.
关键词：Metakaolin;conventional concrete;properties of concrete;XRF study;durability of concrete;China clay