Experimental Research on High-Strength Super Sulphate Cement Paste Mixed with Superfine Mineral Admixtures

Abstract:

Aimed at the performance affect of high-strength super sulphate cement (SSC) paste mixed with superfine mineral admixtures, influence of microbead and silica fume replacing SSC quantity on high-strength SSC paste compression strength were studied under water-cement ratio 0.18; Hydration product morphology and phase were further compared by scanning electron microscopy and X-ray diffraction analyzer in this paper. Results show that, compared with sample HS-1, 3-day strength of HS-2 and HS-3 were increased by 5% and 10%, 28d strength basically unchanged; Furthermore, early strength of HS-7 sample slightly higher and late strength basically unchanged. SSC by adding 5% microbead and 3% silica fume (HS-11) has compressive strength 50.8MPa at 3 days and 86.1MPa at 28 days is significantly higher than other samples. Early strength of HS-11sample mainly depends on hydration reaction of SSC and particle filling effect of admixtures, later strength is due to accelerating consumption of gypsum and promoting formation of ettringite.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 150-155
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.150
• Online since: October 2014
• Authors: Jun Wang, Bao Ying Yu, Long Yang, Yu Xin Gao, Jia Yu Xiang
• Keywords: High-Strength SSC Paste, Hydration Product, Mechanical Property, Superfine Mineral Admixture

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