Reactive transport modelling of long-term carbonation

被引：36
|
作者：
Kari, O. P. [1 ]
Puttonen, J. [1 ]
Skantz, E. [1 ]
机构：
[1] Aalto Univ, Sch Engn, Dept Civil & Struct Engn, FI-00076 Aalto, Finland
来源：
CEMENT & CONCRETE COMPOSITES | 2014年 / 52卷
基金：
芬兰科学院;
关键词：
Carbonation; Concrete; Model; PORE SOLUTION; CONCRETE; TEMPERATURE; DIFFUSION; POROSITY; DEPTH; LAYER; PH;
D O I：
10.1016/j.cemconcomp.2014.05.003
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Concrete specimens of sulphate resistant Portland cement (SRPC) exposed to natural carbonation in a controlled environment for 13 years revealed that the carbonation was significantly underestimated by accelerated tests and extrapolation by a linear diffusion equation. The results confirmed that carbonation as a phenomenon is too complex to be predicted by a conventional diffusion equation for periods considerably exceeding the experimentally covered period. A comprehensive approach consisting of a thermodynamic model and a statistical methodology to simulate long-term carbonation verified by versatile experimental data was presented. As an application of the method, long-term carbonation was simulated for the SRPC concretes. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：42 / 53
页数：12
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