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氯盐干湿循环与碳化耦合作用下混凝土力学性能及微观结构研究
作者：范红军
（郑州工程技术学院，河南 郑州 450044）
摘要：模拟了干湿循环与碳化耦合作用对混凝土抗压强度、弹性模量等力学性能的影响，并对微观孔结构进行分析。结果表明，干湿循环与碳化耦合作用后，混凝土的抗压强度稍有提高，弹性模量稍有下降，孔隙率降低，孔径分布曲线整体向大孔方向偏移，混凝土内部有损伤；单纯碳化条件对混凝土孔径分布曲线没有显著影响，只会增大掺粉煤灰混凝土的临界孔径。
关键词：干湿循环；碳化；耦合作用；混凝土；孔径分布
中图分类号：TU528 文献标识码：A 文章编号：1001-702X（2020）05-0029-04
Study on the mechanical properties and microstructure of concrete under the coupling action of chloride dry-wet cycle and carbonization
FAN Hongjun
（Zhengzhou University of Technology，Zhengzhou 450044，China）
Abstract：The influence of the coupling effect of dry-wet cycle and carbonization on the mechanical properties of concrete such as compressive strength and elastic modulus was simulated，and the micropore structure was analyzed. The results show that after the coupling of dry-wet cycle and carbonization，the compressive strength of the concrete is slightly increased，the elastic modulus is slightly decreased，the porosity is reduced，the overall pore size distribution curve is shifted to the direction of the macropore，and the interior of the concrete is damaged. The carbonization has no significant effect on the pore size distribution curve of concrete，but only increase the critical pore size of fly ash concrete.
Key words：dry-wet cycle，carbonization，coupling effect，concrete，pore size distribution