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中文摘要：
为研究完全碳化混凝土力学性能变化规律,本文开展了C20、C30以及C40三批次混凝土实验室快速碳化以及单调加载试验.试验结果表明,完全碳化混凝土脆性增加,峰值应力提高,其峰值应力提高增幅随混凝土强度增加而减小;完全碳化混凝土峰值应变减小幅度在10%左右,且不随混凝土强度增加而发生明显变化;完全碳化混凝土极限应变随混凝土强度增加而逐渐减小,减小幅度随随混凝土强度增加而增加,当混凝土强度从C20变化到C40情况下,试件极限应变减小幅度为10%-30%.本文研究成果可为既有混凝土结构安全评估及抗震性能分析提供技术依据.
英文摘要：
The purpose of this study is to investigate the effect of full carbonization on the mechanical property of concrete. Three batches of specimens with concrete strength grade of C20, C30, C40 were cast, and accelerated carbonation tests and monotonic loading tests were carried out. It shows that the material brittleness of concrete and the peak strength increased after carbonization; the strain at peak compressive stress decreased about 10% and the effect of concrete strength on the decreasing amplitude was not significant; the ultimate strain decreased and the decreasing amplitude were obviously impacted by the concrete strength grade, and the decreasing amplitude increased from 10% to 30% as the grade changed from C20 to C40. This study can provide the seismic performance evaluation on the existing concrete structure.
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