Concrete carbonation progress on meso-microscopic scale considering effects of chemical reaction

被引：2

作者：

Ba, Mingfang ^{[1
]}

Qian, Chunxiang ^{[2
]}

Liu, Junzhe ^{[1
]}

He, Zhimin ^{[1
]}

机构：

[1] Faculty of Architectural Civil Engineering and Environment, Ningbo University, Ningbo

[2] School of Materials Science and Engineering, Southeast University, Nanjing

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2015年 / 46卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Carbonation reaction; Concrete carbonation model; Meso-microscopic scale; Porous solution basicity;

D O I：

10.11817/j.issn.1672-7207.2015.07.004

中图分类号：

学科分类号：

摘要：

Based on the CO2 transmission mechanism in concrete and the effective media theory, CO2 transport model considering the effects of equivalent porosity and carbonation reaction retarding factor was provided. Then the finite difference scheme was adopted to calculate the time-space concentration distribution of CO2 in concrete. Furthermore, combining the established pH calculating forum of concrete pore solution, the concrete carbonation degree at different ages was determined. Finally by comparing the calculating carbonation depth with the experimental ones, it is found that the results of accelerated carbonation depth has nearly the same changing trend as those of the experimental results, and the maximum difference of above both is only 0.95 mm at the same time. And thus the proposed carbonation model can be used to analyze and predict the carbonation characteristics of concrete with low binder to water ratio. ©, 2015, Central South University of Technology. All right reserved.

引用

页码：2412 / 2418

页数：6

共 21 条

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