矿物外加剂对丁苯聚合物/水泥复合胶凝材料凝结硬化过程的影响及机制

doi:10.11896/j.issn.1005-023X.2017.024.014

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Abstract In order to compare the influence of three kinds of mineral admixtures (zeolite, nano-silica (NA) and rice husk ash (RHA)) on the setting and hardening process of styrene-butadiene copolymer/cement composite cementitious material, the three kinds of mineral admixtures was used as set conditioning material respectively. The influence of the mineral admixtures on the composite cementitious material was compared from setting time, early strength, hydration process, hydration products and so forth. The results showed that all the three kinds of mineral admixtures could promote the setting and hardening of the composite cementitious material. The setting time was shortened greatly and the early strength development was improved. But the set conditioning performance of the three kinds of mineral admixtures was different from each other. Moreover, there were some differences in setting conditioning mechanism: Zeolite had a great promoting effect on the formation of AFt, it not only promoted the hydration reaction of C₃A, but also reacted with Ca(OH)₂ to generate AFt and CSH gel; NA and RHA had a strong promoting effect on the hydration of C₃S, it also reacted with Ca(OH)₂ to generate CSH gel.

Key words： cement styrene-butadiene copolymer zeolite nano-silica rice husk ash setting and hardening

Published: 25 December 2017 Online: 2018-05-08

CLC number:

TU562

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	WANG Ru
	ZHANG Shaokang
	WANG Gaoyong

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WANG Ru,ZHANG Shaokang,WANG Gaoyong. Influence and Mechanism of Mineral Admixtures on Setting and Hardening of Styrene-Butadiene Copolymer/Cement Composite Cementitious Material[J]. Materials Reports, 2017, 31(24): 69-73.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.024.014 OR https://www.mater-rep.com/EN/Y2017/V31/I24/69

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