The prediction model of concrete carbonation depth based on cement hydration

被引：0

作者：

Li, Bei ^{[1
]}

Tian, Ye ^{[1
]}

Jin, Nanguo ^{[1
]}

Jin, Xianyu ^{[1
]}

机构：

[1] Department of Civil Engineering, Zhejiang University, Hangzhou

来源：

Shuili Xuebao/Journal of Hydraulic Engineering | 2015年 / 46卷 / 01期

关键词：

Carbonation depth; Cement hydration; Concrete carbonation; Degree of hydration;

D O I：

10.13243/j.cnki.slxb.2015.01.015

中图分类号：

学科分类号：

摘要：

Based on the periodic boundary conditions, an improved numerical cement hydration model is established in this paper to precisely predict the time varying development of carbonation depth in concrete. Three parameters, including the interfered degrees of unhydrated cement layer, hydration product layer and air layer of central cement grains during the hydration process, are introduced to quantitatively represent the interference effect between cement particles. Considering the influence of cement mineral compositions, water to cement ratio (w/c), particle size distribution on cement hydration process, the development of hydration degree, porosity and hydration products with age are analyzed. Based on the prediction model of carbonation depth in concrete established by Papadakis, a method for predicting the carbonation depth in concrete is proposed in considering cement hydration. The standard carbonation test method was used to verify the model proposed in this research. It can be seen from the experimental research that the numerical simulation results agree well with the experiment. And the prediction model of carbonation depth established in this research is of great importance to the durability investigation of concrete. ©, 2015, China Water Power Press. All right reserved.

引用

页码：109 / 117

页数：8

共 16 条

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