Study on the Delayed Ettringite Formation in Massive Shrinkage Compensating Concrete with U-Type Expansive Agent

被引：0

作者：

Wang, Qian ^{[1
]}

Ren, Zhengyue ^{[2
]}

Zhang, Zhe ^{[3
]}

机构：

[1] Dalian Univ Technol, Dept Engn Mech, Bridge Sci Res Inst, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Civil Engn Inst, Dalian, Peoples R China

[3] Dalian Univ Technol, Bridge Sci Res Inst, Dalian, Peoples R China

来源：

ECOLOGICAL ENVIRONMENT AND TECHNOLOGY OF CONCRETE | 2011年 / 477卷

关键词：

Massive shrinkage compensation concrete; UEA; Delayed Ettringite Formation AFT; AFM;

D O I：

10.4028/www.scientific.net/KEM.477.340

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper introduces the research results of the thermal stability and the delayed formation of ettringite in China and abroad. Aiming at the debate of the ettringite delayed formation condition of the massive shrinkage compensating concrete in the engineering field, the decomposition and delayed formation of ettringite were studied in simulated environments in massive concrete and other controlled curing environment. As UEA is the most applied expansive agent in domestic, the massive shrinkage compensating concrete mixed with UEA is selected as the research object. The test results show that, AFM appears in the research specimens when the inner temperature reach 80 degrees C and the ettringite can reform under the condition of rich water supply after the concrete cooling to an ambient temperature. By comparing the test results of different curing environment, some points for attention during the construction of the UEA massive shrinkage compensating concrete are proposed.

引用

页码：340 / +

页数：3