Abstract
The performance of cement composites was significantly affected by clinker mineral component and nanomaterials. In this work, the effect of clinker mineral component and nanomaterials (nano-SiO2, nano-CaCO3, and nano-TiO2) on cement composites were investigated. Results illustrated that the optimal mineral compositions of C3S, C2S, C4AF, and C3A were 60.23%, 20.01%, 9.74%, and 10.02%, respectively. With the incorporation of nano-particles, the setting time of HCSC was shortened and strength was significantly enhanced, due to acceleration on hydration and optimization on microstructure. The CH content of HCSC containing nano-SiO2 was lower than that of reference due to pozzolanic activity at 28d, whereas the reversed results were found in the HCSC containing nano-CaCO3 and nano-TiO2 due to the nucleation effect promoting hydration. In addition, nano-particles increased mean silicate chain and Al/Si ratio of calcium-silicate-hydrate.
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