Abstract
The ternary effects of nanosilica/polycarboxylate ether superplasticizer nanocomposite ([email protected]), graphene oxide (GO) and fly ash (FA) with different dosages on workability, fly ash hydration, water sorptivity, compressive strength and microstructure development of cement paste were investigated. The results revealed that the [email protected] addition improves the workability of cement paste significantly. The single addition of [email protected] or GO have favorable effect on hydration of FA particle, whereas the hybrid of both in cement cause a bit loss of the FA hydration degree (FA HD). 1% of [email protected] addition and 0.01% of GO dosages in FA-blended cement are sufficient for compensate its early strength loss caused by the FA incorporation. Microstructure investigation verified the formation of new polyhedron-like crystals, with an average length of 1.25 µm and Ca/Si ratio of 12.99, in cement of 28 days.
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