[1]陈树东,孙伟,张云升,等.粉煤灰混凝土二维、三维碳化深度的预测[J].东南大学学报(自然科学版),2007,37(4):645-650.[doi:10.3969/j.issn.1001-0505.2007.04.020]
　Chen Shudong,Sun Wei,Zhang Yunsheng,et al.Carbonation depth prediction of fly ash concrete subjected to 2 and 3 dimensional CO2 attack[J].Journal of Southeast University (Natural Science Edition),2007,37(4):645-650.[doi:10.3969/j.issn.1001-0505.2007.04.020]
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粉煤灰混凝土二维、三维碳化深度的预测()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第4期
页码:
645-650
栏目:
材料科学与工程
出版日期:
2007-07-20

文章信息/Info

Title:
Carbonation depth prediction of fly ash concrete subjected to 2 and 3 dimensional CO2 attack
作者:
陈树东;  孙伟;  张云升;  郭飞
东南大学材料科学与工程学院,南京 211189
Author(s):
Chen Shudong;  Sun Wei;  Zhang Yunsheng;  Guo Fei
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
关键词:
粉煤灰混凝土;  二维碳化;  三维碳化;  交互系数;  数学模型
Keywords:
fly ash concrete;  2D carbonation;  3D carbonation;  interaction coefficient;  mathematical model
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2007.04.020
摘要:
通过快速碳化试验,研究了不同粉煤灰掺量(0%,20%,40%,60%)下高性能混凝土一维、二维和三维碳化深度; 定义了二维和三维碳化的交互系数; 分析了二氧化碳扩散时间依赖性系数n和二维、三维交互系数K; 推导了包含n和K的二维和三维碳化数学模型.实验表明,混凝土的二维、三维碳化具有一个明显的交互作用; 交互系数服从经时衰减函数; 通过傅立叶级数展开多维扩散交互系数,可求解基于Fick第一扩散定律的二维和三维碳化寿命预测的数学模型.通过对苏通大桥箱梁部位结构混凝土寿命进行预测,其一维、二维和三维预测寿命分别为1 595年、882年和758年,二维和三维碳化寿命明显降低.
Abstract:
Based on accelerated carbonation tests, 1D, 2D and 3D carbonation of high performance concrete with different fly ash contents(0%,20%,40%,60%)are studied. The interaction coefficients of 2D and 3D are defined; the time dependence coefficient n of carbon dioxide diffusion and the interaction coefficients K of 2D and 3D carbonation are analyzed. The mathematical model which includes n and K is deduced. The experiments indicate that 2D and 3D carbonation have obvious interaction; interaction coefficients obey the attenuation function through time t. The mathematical model of 2D and 3D carbonation life prediction based on Fick scattering law can be solved by Fourier expansion. The life prediction of concrete of Sutong Bridge beam shows that the 1D, 2D and 3D carbonation prediction life are 1 595, 882 and 758 years, respectively, 2D and 3D carbonation life predicted are reduced clearly.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 交通部西部交通科技重点资助项目(2006ZB12); 江苏省重大工程资助项目(STDQ-04HT20SY-010).
作者简介: 陈树东(1978—),男,博士生; 孙伟(联系人),女,教授,博士生导师,中国工程院院士,sunwei@seu.edu.cn.
更新日期/Last Update: 2007-07-20