▎ 摘　　要

The ternary effects of nanosilica/polycarboxylate ether superplasticizer nanocomposite (NS@PCE), 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 NS@PCE addition improves the workability of cement paste significantly. The single addition of NS@PCE 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 NS@PCE 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 mu m and Ca/Si ratio of 12.99, in cement of 28 days. (C) 2020 Elsevier Ltd. All rights reserved.