首页|Macro-mechanics and Microstructure of Nanomaterial-modified Geopolymer Concrete:A Comprehensive Review
Macro-mechanics and Microstructure of Nanomaterial-modified Geopolymer Concrete:A Comprehensive Review
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We have described in detail the effects of nano-SiO2,nano-CaCO3,carbon nanotubes,and nano-Al2O3 on geopolymer concrete from the perspectives of macro mechanics and microstructure.The existing research results show that the mechanism of nano-materials on geopolymer concrete mainly includes the filling effect,nucleation effect,and bridging effect,the appropriate amount of nano-materials can be used as fillers to reduce the porosity of geopolymer concrete,and can also react with Ca(OH)2 to produce C-S-H gel,thereby improving the mechanical properties of geopolymer concrete.The optimum content of nano-SiO2 is between 1.0%and 2.0%.The optimum content of nano-CaCO3 is between 2.0%and 3.0%.The optimum content of carbon nanotubes is between 0.1%and 0.2%.The optimum content of nano-Al2O3 is between 1.0%and 2.0%.The main problems existing in the research and application of nanomaterial-modified geopolymer concrete are summarized,which lays a foundation for the further application of nanomaterial in geopolymer concrete.
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