EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIOR OF LIGHTWEIGHT AGGREGATE CONCRETE BEAMS
Based on the experiment of 5 beam specimens (including 2 lightweight aggregate concrete beams, 1 fiber lightweight aggregate concrete beam and 2 normal-weight concrete beams), the mechanical properties of lightweight aggregate concrete beam ( including the failure pattern, bearing capacity, the changing regularity for deflections and the development of cracks) are analyzed and studied. Comparisons are made among the lightweight aggregate concrete specimens, fiber lightweight aggregate concrete specimen and normal-weight concrete specimens on the respects mentioned above. A comparison is made between the experimental results of deflection under service load and the allowable values of Specification JGJ12-2006. The test results of crack width are also compared with computed values based on current Specification. The analysis results indicate that the experimental deflection results can meet the requirement of the allowable value. It is safe to estimate the lightweight aggregate concrete beams crack width using the formula of Specification JGJ 12-2006. But the formula should be revised when it is used on lightweight aggregate concrete beams after mixing polypropylene fiber.
lightweight aggregate concrete beams flezural behavior deflection crack width polypropylene fiber
Jun-Wu Tang Qi-Bin Zhang
Dept. of Logistics Command and Engineering, Naval Univ. of Engineering, Tianjin 300450,P.R. China Dept. of Logistics Command and Engineering, Naval Univ. of Engineering,Tianjin 300450, P.R. China
国际会议
广州
英文
363-368
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）