施工方式对高性能混凝土抗渗性影响试验研究

Test and Research on Effects of Construction Methods on Permeability High-Performance Concrete

应用正交试验设计设计9组高性能混凝土。正交试验为三因素三水平,选取L9(34)正交表。三因素三水平分别为搅拌(人工搅拌,机械搅拌,超时机械搅拌)、振捣(人工振捣,机械振捣,免振捣)及养护(自然养护,标准养护,绝湿养护)。针对该9组混凝土氯离子渗透试验,对试验结果进行正交试验的级差分析及方差分析。分析表明,对高性能混凝土渗透性影响最显著的施工因素是搅拌;最佳施工方式为:超时搅拌,机械振捣,绝湿养护。

9 groups of high-performance concrete are designed with orthogonal experimental design,in which there are 3 factors and 3 levels.The orthogonal experimental design table is L9（34）.The factors and levels are mixing（artificial mixing,mechanical mixing,overtime mixing）,vibrating（artificial vibrating,mechanical vibrating,vibration-free） and curing（natural curing,standard curing,humidity insulation curing）.Permeability tests of 9 groups of high-performance concrete are carried out,and then differential analysis and variance analysis of orthogonal test are carried out.The analysis indicated that the most significant construction factor on the permeability of high-performance concrete is mixing and the best construction method is overtime mixing,mechanical mixing,humidity insulation curing.