寒冷地区再生混凝土抗折强度试验研究  

Experimental study on the flexural strength of recycled aggregate concrete in cold areas

作　　者：郑秀梅[1] 刘晓丹[1] 张玫[1] 周宇[1] 肖永[1] 

机构地区：[1]佳木斯大学建筑工程学院,黑龙江佳木斯154002

出　　处：《混凝土》2014年第3期84-86,89,共4页Concrete

基　　金：佳木斯大学青年基金项目资助(Lq2012-39)

摘　　要：为了研究寒冷地区不同粗骨料取代率再生混凝土的抗折强度,共设计了33个不同再生粗骨料取代率(0、10%、20%、30%、40%、50%、60%、70%、80%、90%、100%)标准试块进行抗折试验,其中标准棱柱体试件33块。获取了不同粗骨料取代率再生混凝土的抗折强度数据与折断面图片,分析了粗骨料取代率对抗折强度的影响。试验结果表明:寒冷地区再生粗骨料混凝土的抗折强度随再生粗骨料取代率的不同而出现不同的变化,呈现先升后降趋势,其中30%取代率的再生混凝土抗折强度最高,100%取代率的最低。In order to study the flexural strength of different relacemnet percentages recycled coarse aggregate concrete.33 specimens were designed for the test,which relacemnet percentages recycled coarse aggregate are 0, 10%,20%, 30%,40%, 50%, 60%, 70%, 80%, 90%, 100%.Ac-cording to the experiment, the flexural strength of recycled aggregate concrete （RAC） and fi＇acture surface imagesare obtaine, and the influence of relacemnet percentagesrecycled coarse aggregate are analyzed.The results show that the flexural strength of recycled aggregate concrete in cold areas is different change with different relacemnet percentages recycled coarse aggregate, and it first increased and then decreased subsequently.the flexural strength of 30% substitution rate of recycled concrete is the highest, and 100% substitution rate＇s is the lowest.

关 键 词：再生混凝土 再生粗骨料 取代率 抗折强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]