纳米C-A-S-H与DEIPA复掺对不同温度下水泥早期水化的影响

doi:10.16552/j.cnki.issn1001-1625.2024.1444

摘要/Abstract

摘要： 本文旨在探究纳米水化硅铝酸钙(C-A-S-H)和二乙醇单异丙醇胺(DEIPA)两者复掺对不同养护温度下水泥早期水化、凝结时间、化学收缩、抗压强度的影响,并通过水化热、XRD、TG和SEM对其作用机理进行分析。结果表明,在不同养护温度下,加入纳米C-A-S-H和DEIPA后,硅酸盐和铝酸盐水化速度加快,体系内生成了更多的水化产物,水泥凝结时间有所缩短,其中当养护温度为10 ℃时,试验组初凝时间和终凝时间较对照组分别缩短13.06%和11.75%。龄期为24 h时,在0、10和20 ℃的养护温度下,与对照组相比,试验组化学收缩分别增加20.00%、13.79%和9.30%。水泥砂浆抗压强度较对照组均有所增加,当龄期为24 h,养护温度为-15、0、10、20 ℃时,抗压强度分别增长94.48%、85.91%、55.93% 和23.17%。

关键词: 纳米C-A-S-H, DEIPA, 温度, 早期水化, 化学收缩, 抗压强度

Abstract: The purpose of this paper was to explore the effect of nano calcium aluminosilicate hydrate (C-A-S-H) and diethanol monoisopropanolamine (DEIPA) composite on the early hydration, setting time, chemical shrinkage and compressive strength of cement at different curing temperatures. The mechanism was analyzed by hydration heat, XRD, TG and SEM. The results show that after adding nano C-A-S-H and DEIPA at different curing temperatures, the hydration rate of silicate and aluminate is accelerated, more hydration products are formed in the system, and the setting time of cement is shortened. When the curing temperature is 10 ℃, the initial setting time and final setting time are shortened by 13.06% and 11.75% respectively compared with the blank group. At the curing temperature of 0, 10 and 20 ℃, the chemical shrinkage increases by 20.00%, 13.79% and 9.30% respectively compared with the blank group at age of 24 h. The compressive strength of cement mortar increases compared with the blank group. When the age is 24 h, and the curing temperature is -15, 0, 10 and 20 ℃, the compressive strength increases by 94.48%, 85.91%, 55.93% and 23.17%, respectively.

Key words: nano C-A-S-H, DEIPA, temperature, early hydration, chemical shrinkage, compressive strength

中图分类号:

TQ172

房延凤, 马雪, 丁向群, 佟钰. 纳米C-A-S-H与DEIPA复掺对不同温度下水泥早期水化的影响[J]. 硅酸盐通报, 2025, 44(6): 1996-2004.

FANG Yanfeng, MA Xue, DING Xiangqun, TONG Yu. Effect of Nano C-A-S-H and DEIPA Composite on Early Hydration of Cement at Different Temperatures[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(6): 1996-2004.

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