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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (2): 368-376.

Special Issue: 水泥混凝土

• Cement and Concrete • Previous Articles     Next Articles

Effect of Superfine CaCO3 on Properties of Sulphoaluminate Cement-Based Double Fluid Grouting Material

WANG Yanfeng, LIU Songhui, HAN Kang, ZHANG Li, GUAN Xuemao   

  1. Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
  • Received:2020-09-08 Revised:2020-10-09 Online:2021-02-15 Published:2021-03-10

Abstract: In order to further improve the mechanical properties and carbonation resistance performance of sulphoaluminate cement-based double fluid grouting material (SCGM), superfine calcium carbonate (SC) was synthesized by gas-liquid carbonation method, and the effect of SC content on the setting time, hydration and hardening performance, carbonation resistance performance and microstructure of SCGM was studied. The results show that SC promotes the hydration of SCGM, improves mechanical strength and carbonation resistance performance. When the SC mass fraction is 3%, the compressive strength of 6 h and 28 d increases by 29.40% and 26.43%, respectively. After 5 d of carbonation, the depth of carbonation was reduced by 24.12%, and after 7 d of carbonation, the carbonation shrinkage was reduced by 19.05%.The research results provide a new method for improving the mechanical properties and the carbonation resistance performance of SCGM.

Key words: superfine CaCO3, sulphoaluminate cement, grouting material, mechanical property, carbonation resistance performance

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