C40自密实再生混凝土配合比设计  

Mix design on C40 self-compacting recycled concrete

作　　者：赵丙晨 王云洋 肖磊 黎滔 蒋楚 杨光 李梦[1] 唐响亮[1] 陈海燕 胡轩浙 ZHAO Bingchen;WANG Yunyang;XIAO Lei;LI Tao;JIANG Chu;YANG Guang;LI Meng;TANG Xiangliang;CHEN Haiyan;HU Xuanzhe(School of Civil and Architecture Engineering,Hunan University of Arts and Science,Changde 415000;Hunan Province Cooperative Innovation Center for the Construction&Development of Dongting Lake Ecological Economic Zone,Changde 415000;Furong College,Hunan University of Arts and Science,Changde 415000)

机构地区：[1]湖南文理学院土木建筑工程学院,湖南常德415000 [2]洞庭湖生态经济区建设与发展湖南省协同创新中心,湖南常德415000 [3]湖南文理学院芙蓉学院,湖南常德415000

出　　处：《中国建材科技》2020年第4期50-54,共5页China Building Materials Science & Technology

基　　金：湖南省自然科学基金资助项目(2020JJ5394);湖南文理学院博士科研启动项目(18BSQD28);湖南文理学院教改项目(JGYB1953);湖南文理学院创新创业项目;湖南省大学生研究性学习和创新性实验计划项目(湘教通[2018]255号);湖南省教育厅科学研究项目(18C0755);湖南文理学院2019年大学生创新创业研究项目自筹项目(ZC19042);2020年湖南文理学院芙蓉学院大学生创新创业项目。

摘　　要：采用再生粗骨料对C40自密实再生混凝土的配合比进行了设计,并测试了新拌混凝土的性能和28天立方体抗压强度。结果表明,C40自密实再生混凝土的浆体体积介于0.352~0.414m^3/m^3、砂率为50%左右时,对应新拌混凝土的坍落度和坍落度扩展度范围分别为233~245mm和567~612mm,新拌混凝土的流动性、粘聚性和保水性均较好。C40自密实再生混凝土的立方体抗压强度介于38.3~46.2MPa,满足C40混凝土强度要求,表明采用再生粗骨料可以配制出工作性能良好、强度符合要求的C40自密实再生混凝土。The mix ratio of C40 self-compacting recycled concrete is designed by recycled coarse aggregate. The performance of fresh concrete and cubic compressive strength of 28 day are tested. Results show that the ranges of slump and slump expansion of fresh concrete are 233-245 mm and 567-612 mm respectively when the slurry volume is between 0.352-0.414 m^3/m^3 and the sand ratio is about 50%. The fluidity, cohesion and water retention of fresh concrete are good. The cubic compressive strength of C40 self-compacting recycled concrete is between 38.3-46.2 MPa. It satisfies the strength of C40 concrete. It shows that C40 self-compacting recycled concrete with good workability and strength can be made by recycled coarse aggregate.

关 键 词：再生粗骨料 自密实再生混凝土 配合比设计 坍落度扩展度 

分 类 号：TU528[建筑科学—建筑技术科学]