IMPACT OF CRACKING DAMAGE ON CONCRETE TRANSPORT PROPERTIES

摘要：

Recent experimental results are reported on the alteration of concrete durabilityproperties by cracking. To obtain different cracking extent and cracking from different origins,totally 99 concrete specimens are subject to mechanical axial compression,drying-wettingcycles and early shrinkage constraint tests respectively. The cracking extent of specimens isquantified by ultrasonic pulse velocity (UPV) measurement through elastic wave propagationtheory. For mechanical cracking,volumetric strain is equally measured. With the quantifieddamage factor,the cracked specimens are subject to rapid chloride permeability test (RCPT),rapid chloride diffusivity test (NEL method) and rapid freeze-thaw test. By the availableresults,the correlations between concrete cracking extent and altered transport properties areestablished through damage factor. In addition to material damage extent,the crack patternand connectivity are also identified as determinant influential factors. General remarks aregiven in the end for the practical application of the available correlations.

关键词： cracking damage concrete transport properties durability

作者: Kefei LI Chao XU Zhaoyuan CHEN

作者单位: Key Laboratory of Structural Engineering and Vibration of China Education Ministry,Civil Engineering Department,Tsinghua University,Beijing,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 466-472

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）