聚羧酸减水剂对硫铝酸盐水泥水化及硬化的影响

doi:10.11896/cldb.201904011

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Abstract The purpose of this contribution is to study the hydration and hardening behavior of sulphoaluminate cement (SAC) paste with certain adding amounts of polycarboxylate superplasticizer (PCE). By designing and conducting relevant experiments, we determined multiple properties indexes for SAC, such as water requirement of normal consistency, initial fluidity, fluidity variation with time, viscosity, setting time and, strength, and also measured out the hydration temperature and the hydration products of SAC paste with PCE. The results indicate that the optimum do-sage of PCE in the SAC paste is 0.4%, under which the water reduction rate and the initial fluidity can exceed 33%, and 375 mm, respectively. Moreover, the initial and final setting time of SAC paste are extended from 24 min and 36 min to 117 min and 129 min, respectively. PCE has considerable improvement effect onto the fluidity of the SAC paste, as well as a certain postponing effect to setting and hardening. A PCE content within 0.2% to 0.4% leads to slow growth of early strength but exerts inconspicuous influence on the strength increase in the later stage. When the PCE content is 0.4%, the 7 d compressive strength and flexural strength reach 102 MPa and 11.6 MPa, which had the increments of 41.8% and 20.8% compared with the control group, respectively.

Key words： sulphoaluminate cement polycarboxylate superplasticizer hydration and hardening retardation strength

Published: 11 March 2019

CLC number:

TU528.042.2

Fund:This work was financially supported by the National Key Research and Development Program of China(2016YFB0303505).

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	Articles by authors
	LIU Congzhen
	FAN Yingru
	WANG Lei
	HUANG Yongbo
	QIAN Jueshi

Cite this article:

LIU Congzhen,FAN Yingru,WANG Lei, et al. Hydration and Hardening of Sulphoaluminate Cement Paste Under the Influence of Polycarboxylate Superplasticizer[J]. Materials Reports, 2019, 33(4): 625-629.

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http://www.mater-rep.com/EN/10.11896/cldb.201904011 OR http://www.mater-rep.com/EN/Y2019/V33/I4/625

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