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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (5): 1429-1140.

Special Issue: 水泥混凝土

• Cement and Concrete • Previous Articles     Next Articles

Research Progress on Preparation of Nano Calcium Silicate Hydrate and Its Influence on Cement Hydration

CHEN Jiao1, YU Cheng2,3, MU Ru1, YU Xin2,3   

  1. 1. School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China;
    2. State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, China;
    3. Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
  • Received:2020-12-29 Revised:2021-02-07 Online:2021-05-15 Published:2021-06-07

Abstract: With the continuous development of nanotechnology, nanomaterials are gradually used in traditional concrete materials to improve the various performance of concrete. Nano calcium silicate hydrate (nano C-S-H) is a new type of early strength nanocomposites, it can accelerate the early hydration rate of cement through the seeding effect, and significantly improve the early mechanical properties of cement-based materials, so as to improve the construction efficiency and meet the special construction requirements. In this paper, the preparation methods of nano C-S-H and the influence of nano C-S-H on the early and long-term properties of cement-sbased materials are systematically summarized, the influence mechanism of nano C-S-H on the hydration process and hydration products of cement is discussed, especially the C-S-H/PCE (polycarboxylic acid type water reducer, called PCE) nanocomposites prepared by polymer dispersed nanoparticles are introduced.

Key words: nano calcium silicate hydrate, C-S-H/PCE nanocomposite, cement hydration, mechanical performance, early strength, long-term strength

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