橡胶细集料掺量及粗细程度对混凝土抗盐冻性能的影响  

Effect of Rubber Fine Aggregate Content and Fineness on Frost Salt Resistance of Concrete

作　　者：周梅[1] 赵华民[1] 徐秒[1] 浦倍超 田博宇[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,阜新123000

出　　处：《硅酸盐通报》2014年第7期1816-1822,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金委员会与神华集团有限公司联合资助项目(U1261122);辽宁省教育厅科学研究项目(L2012123)

摘　　要：以橡胶颗粒取代砂子的取代率及细度模数为变量,通过二因素、四水平的正交试验,研究橡胶颗粒掺量和粗细程度对混凝土抗盐冻性能的影响。结果表明,橡胶细集料掺入混凝土中具有引气和填充的双重功效,可显著提高混凝土表面的抗盐冻性能。橡胶颗粒的取代率对混凝土抗盐冻性能影响特别显著,细度模数对混凝土抗盐冻性能影响显著。相对动弹性模量损失最初随着橡胶颗粒取代率的递增而减小,但当橡胶颗粒体积取代率大于40%时,相对动弹性模量损失随着橡胶颗粒取代率的递增而增加。在相同的取代率下,橡胶颗粒越细混凝土的相对动弹性模量损失越小。当橡胶颗粒取代率为40%,细度模数为1.38时,橡胶集料混凝土的抗盐冻等级已达到F500。Take the sand substitution rate and fineness modulus of rubber particle as variables, of rubber fine aggregate content and fineness on frost salt resistance of concrete is studied by and four levels orthogonal test. The study shows that when used in concrete, rubber particles the effects two factors possess air entraining and filling dual effect, which dramatically improves frost salt resistance of concrete surface as a result. The replace rate of rubber particles has a particularly pronounced influence and fineness modulus has a significant influence on frost salt resistance of concrete. The relative dynamic modulus of elasticity loss decrease initially with the increase of rubber particles replacement rate, but when volume replace rate of rubber particles is more than 40%, the relative dynamic modulus of elasticity loss increases with the increase of rubber particles replacement rate. Under the same replacement ratio, the relative dynamic elastic modulus loss is smaller of the more detailed rubber particles concrete. Rubber particles replace rate was 40%, the fineness modulus of 1.38 rubber frozen level. aggregate concrete, have achieve FS00 salt resistant

关 键 词：橡胶颗粒 混凝土 抗盐冻 动弹性模量 

分 类 号：TU528[建筑科学—建筑技术科学]