Degradation of fly ash concrete under the coupled effect of carbonation and chloride aerosol ingress
Degradation of fly ash concrete under the coupled effect of carbonation and chloride aerosol ingress
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碳化和氯化物气溶胶侵入耦合作用下粉煤灰混凝土的降解
DOI：
10.1016/j.corsci.2016.08.004
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发表时间：
2016-11-01
影响因子：
8.3
通讯作者：
He, Yijian
中科院分区：
文献类型：
--
作者：
Liu, Jun;Qiu, Qiwen;He, Yijian
本文对碳化和氯离子气溶胶对粉煤灰混凝土耐久性的耦合影响进行了试验研究。实验结果表明，碳化作用显著影响了氯离子的进入剖面，降低了氯离子的结合能力，加快了氯离子的扩散速度。另一方面，氯化物气溶胶的存在降低了粉煤灰混凝土的碳化率。通过扫描电镜和压汞孔隙法的微观分析结果，揭示了混凝土碳化与氯离子气溶胶的相互作用性质。(C) 2016 Elsevier Ltd.版权所有。
This paper presents an experimental investigation regarding the coupled effect of carbonation and chloride aerosol ingress on the durability performance of fly ash concrete. Test results demonstrate that carbonation significantly affects the chloride ingress profile, reduces the chloride binding capacity, and accelerates the rate of chloride ion diffusion. On the other hand, the carbonation rate of fly ash concrete is reduced by the presence of chlorides aerosol. The interaction nature between concrete carbonation and chloride aerosol ingress is also demonstrated by the microscopic analysis results obtained from scanning electron microscope and mercury intrusion porosimetry. (C) 2016 Elsevier Ltd. All rights reserved.