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- W4220794217 endingPage "126388" @default.
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- W4220794217 abstract "Micro- and nano-sized SiO2 particles, i.e., silica fume (SF) and nanosilica (NS) have been extensively documented of improving the durability of concrete, but rare investigation on their specific effects on tri-calcium aluminate (3CaO·Al2O3, C3A) reactions/performances in harsh environment has been reported. This work determined the effects of SF and NS on the hydration and hardening properties of C3A-gypsum systems, and their performances under sulfate attack. Results showed that NS and SF can effectively improve the sulfate attack resistivity of the C3A-gypsum systems due to the filling effect and the reduction of crystal size/morphology-induced expansion: a significant reduction of the aspect ratio (length/diameter) can be observed in the NS-added sample comparing the pure C3A-gypsum system. Comparatively, SF can hardly change the morphology of ettringite (AFt), which could be due to that its bigger particle size cannot effectively block the ion migration. It is expected that these findings could contribute to the utilization of fine/ultra-fine SCMs in cementitious materials systems, especially those with high amount of aluminate phases." @default.
- W4220794217 created "2022-04-03" @default.
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- W4220794217 date "2022-03-01" @default.
- W4220794217 modified "2023-10-01" @default.
- W4220794217 title "Regulations on the hydration, morphology, and sulfate-attack resistivity of C3A with micro/nano-silica particles" @default.
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- W4220794217 doi "https://doi.org/10.1016/j.conbuildmat.2022.126388" @default.
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