不同养护条件下硫硅酸钙-硫铝酸钙水泥的性能研究

doi:10.11896/cldb.21040035

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Abstract Ternesite-ye'elimite cement is a new type of low-carbon binder in which the hydration reactivity of ternesite has a significant effect on cement properties. In this work, ternesite-ye'elimite cement was prepared by adding ion doping. The effect of curing temperature and humidity on the mechanical property, dimensional stability and hydration products of ternesite-ye'elimite cement were investigated. The results indicate that the phase composition of the clinker is close to the target mineralogical composition. The compressive strengths of cement pastes cured at 40 ℃ and 60 ℃ are much higher than those of cement pastes cured at 20 ℃. Compared with air curing, water curing provides cement pastes with higher compresive strengths apparently. Increasing curing temperature results in much higher expansion rate of mortars, but the expansion tends to be constant at later ages, which indicates that the hydration of ternesite at higher temperatures is harmless to the volume stability of ternesite-ye'elimite cement. Higher temperature can promote the ettringite formation at 3 d, but the amount of ettringite decreases in cement pastes cured at 60 ℃. After 28 d of hydration, a similar ettringite formation of cement pastes cured at different temperatures is observed. The cement pastes cured at air and water show a similar ettringite development with ongoing hydration.

Key words： ternesite-ye'elimite cement temperature humidity strength hydration ettringite

Published: 25 June 2022 Online: 2022-06-24

CLC number:

TU525

Fund:National Natural Science Foundation of China (51802279) and the Opening Project of State Key Laboratory of Green Building Materials.

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	Articles by authors
	SHEN Yan
	ZHU Hangyu
	WANG Peifang
	CHEN Xi
	QIAN Jueshi

Cite this article:

SHEN Yan,ZHU Hangyu,WANG Peifang, et al. Study on the Performance of Ternesite-Ye'elimite Cement at Different Curing Conditions[J]. Materials Reports, 2022, 36(12): 21040035-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21040035 OR http://www.mater-rep.com/EN/Y2022/V36/I12/21040035

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