聚羧酸减水剂对再生混凝土流动性影响正交试验设计.pdfVIP

学兔兔 2015年 第6期(总第 308期 ) 混 凝 土 原材料及辅助物料 Number 6 in 2015(Total No．308) Concrete MATERIAL AND ADMINICLE doi：10．3969／j．issn．1002—3550．2015．06．022 聚羧酸减水剂对再生混凝土流动性影响正交试验设计 王玲玲。宋学君，孙小巍，刘 锁，曹晓梭 (沈阳建筑大学材料科学与工程学院，辽宁沈阳110168) 摘 要：采用L (3 )正交试验设计方案，以再生骨料掺量、水灰比和聚羧酸减水剂掺量为因素，分别选取相应合适的水平，按照 国家标准方法进行再生混凝土坍落度和28 d抗压强度等相关性能测试并分析相关规律。正交试验结果表明，影响再生混凝土坍 落度的主次因素为再生骨料掺量聚羧酸减水剂掺量水灰比。对于再生混凝土的流动性，再生骨料掺量是非常显著因素，聚 羧酸减水剂掺量和水灰比都是显著因素。聚羧酸减水剂的加入可较大程度提高再生混凝土的28 d抗压强度。 关键词：再生混凝土；聚羧酸减水剂；坍落度；抗压强度；正交试验设计 中图分类号：TU528．042．2 文献标志码：A 文章编号：1002—3550(2015)06—0088—02 Effects of polycarboxylate superplastlcizer on the mobility of recycled concrete WANG Lingling，SONG Xuejun，SUNXiaowei，LIU Suo，CAO Xiaohui (Institute of Materials Science and Engineering，Shenyang Jianzhu University，Shenyang 1 10168，China) Abstract：It adopted Lq(3 )orthogonal experiment design to analyze the influential factors and relative laws about the properties such as slump and 28 d compressive strength of recycled concrete when adding appropriate polycarboxylate superplasticizer．In the analysis the adding quantity of recycled aggregates，water to cement ratio and the adding quantity of polycarboxylate superplasticizer are chosen to be the factors，while corresponding suitable levels are also given respectively．Results show that for the mobility of recycled concrete， the adding quanti~of recycled aggregates is the most dramatic factor，the adding quantity of polycarboxylate superplasticizer secondly and water to cement ratio thirdly．In addition，polycarboxylate superplasdcizer can greatly improve the 28 d compressive strength of recy— cled concrete． Key words：