Effect of the hydration of C3A-gypsum on the time-dependent flowability of CaCO3-C3A-gypsum paste

被引：0

作者：

Yang, Yong ^{[1
,2
]}

Zhang, Qianqian ^{[2
]}

Ran, Qianping ^{[1
]}

Shu, Xin ^{[2
,3
]}

Han, Fangyu ^{[2
]}

Liu, Jianzhong ^{[2
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing, Peoples R China

[2] Jiangsu Sobute New Mat Co Ltd, State Key Lab High Performance Civil Engn Mat, Nanjing, Jiangsu, Peoples R China

[3] Sichuan Sobute New Mat Co Ltd, Suining, Peoples R China

来源：

JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS | 2025年 / 14卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Specific surface area; ettringite; hemihydrate; C(3)A; flowability; hydration; YIELD-STRESS; PORTLAND-CEMENT; SURFACE-AREA; ETTRINGITE; PCE; SUPERPLASTICIZERS; ADSORPTION; KINETICS; IMPACT; YODEL;

D O I：

10.1080/21650373.2024.2440743

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

To enhance the understanding of the effect of C(3)A-gypsum hydration on the time-dependent flowability of cement paste, calcium carbonate powder was introduced to prepare a simplified model system representing cement paste, referred to as CaCO3-C(3)A-gypsum. Effect of C(3)A content, gypsum content, and types of sulfates on the C(3)A-gypsum hydration and then the time-dependent flowability of paste was investigated. The results shown that for CaCO3-C(3)A-gypsum paste, it was the substantial increase in specific surface area that caused by the precipitation of ettringite during the C(3)A-gypsum hydration, resulted in the loss of flow spread. As hemihydrate gypsum was introduced, the dissolution of hemihydrate gypsum and the precipitation of dihydrate gypsum was important for temporal evolution of flowability. This study has scientific guiding significance for predicting or exploring the internal essence of the temporal evolution of early flowability of cement paste or concrete.

引用

页码：393 / 404

页数：12

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