中文摘要：

为研究混凝土裂缝宽度和深度对裂缝表面混凝土碳化的影响,制作了带裂缝的钢筋混凝土试件并进行了碳化试验研究。研究采用碳化时未开裂的试件、裂缝近似贯通的试件、裂缝未贯通的试件的横断面,其中裂缝近似贯通试件、裂缝未贯通试件的横断面即为裂缝开裂断面。对于裂缝近似贯通和未贯通的试件,通过对比裂缝的宽度、深度和裂缝表面混凝土的碳化情况,并与未开裂试件断面混凝土碳化情况进行对比分析。研究结果表明,裂缝宽度对于混凝土裂缝表面的碳化几乎没有影响,表面碳化主要与裂缝深度有关。本文对混凝土开裂部位的耐久性研究仅以裂缝表面宽度为依据进行的方法提出了不同看法,建议将混凝土裂缝宽度和深度列为同等重要的研究依据。

英文摘要：

In order to study the effect of crack width and depth on surface carbonization of concrete cracks,reinforced concrete specimens with cracks were made,and carbonization experiments were carried out.The specimens without and with approximately penetrating cracks in transverse section during carbonization were used.For the specimens with cracks,the cross-section of specimens was also the cracking section.For the specimens without cracks and with approximately penetrating cracks,the analysis was carried out through comparing the crack width,the crack depth and the carbonation of crack surface,and the carbonization specimens without crack were also taken into comparison.The research results showed that,the crack width has little effect on surface carbonization of concrete cracks,and surface carbonization was mainly related with the crack depth.A different viewpoint to the present durability research of cracking concrete parts which is only based oncrack width was put forward,and the width and depth of concrete cracks were suggested equal importance in the research.