A new chemo-mechanical model of damage in concrete under sulfate attack

被引：57

作者：

Chen, Jian-kang ^{[1
,2
]}

Qian, Chen ^{[1
]}

Song, Hui ^{[1
]}

机构：

[1] Ningbo Univ, Mech & Mat Sci Res Ctr, Fenghua Rd 818, Ningbo 315211, Zhejiang, Peoples R China

[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Zhongguancun, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 115卷

基金：

中国国家自然科学基金;

关键词：

Concrete; Sulfate attack; Damage evolution; Chemical reaction; Ultrasonic technique; DELAYED ETTRINGITE FORMATION; CEMENTITIOUS MATERIALS; FLY-ASH; DETERIORATION; RESISTANCE; MORTARS; PERFORMANCE; EVOLUTION; HEAT;

D O I：

10.1016/j.conbuildmat.2016.04.074

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Damage evolution is detected via the degradation of modulus of concrete immersed in sulfate solution. The mechanism of the damage is investigated by using SEM method, and it is proved that the internal expansion stress induced by delayed ettringite leads to the nucleation of micro-cracks. The criterion of damage nucleation is proposed in terms of the tension strength of concrete. The differential equation with respect to the internal expansion stress is derived by virtue of chemical reaction rate on delayed ettringite formation, and a new chemo-mechanical model of corrosion damage in concrete under sulfate attack is then proposed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：536 / 543

页数：8

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