摘要
为研究粗骨料堆积密度变化及砂率变化对火山渣轻骨料混凝土性能的影响,通过改变不同单粒级骨料体积含量来改变粗骨料堆积密度和砂率,并测试新拌混凝土的工作性能以及硬化混凝土的力学性能。研究表明:当最大公称粒径为16mm的单粒级火山渣粗骨料与最大公称粒径为10mm的单粒级火山渣粗骨料两粒级体积比为7∶3时,达到最紧密堆积,此时混凝土最密实,抗压强度最高;火山渣粗骨料与火山砂细骨料体积比为7∶6时,即砂率为46%时,火山渣轻骨料混凝土具有最佳的工作性与力学性能。
In order to study the effect of coarse aggregate packing density and sand ratio changes on the performance of cinder lightweight aggregate concrete,the packing density of the aggregate and sand ratio are changed by changing the different dosage of single graded aggregate volume,and the performance of fresh concrete and hardened concrete mechanics are tested. The results show that the maximum nominal size of 16 mm with 10 mm single slag coarse aggregate mixture grading is the best when the volume ratio of 7∶ 3,and this ratio can achieve the most tightly packed. At this ratio the concrete can get the most dense and the highest compressive strength. The Cinder lightweight aggregate concrete has the best workability and mechanical properties when the volume ratio of coarse aggregate and fine aggregate at 7∶ 6 and the sand rate at 46%.
作者
黎蔚诗
王旭
夏京亮
周永祥
李固华
Li Weishi1 ,2, Wang Xu3 , Xia Jingliang 1 , Zhou Yongxiang 1, Li Gugua2(1. China Academy of Building Research, Beijing 100013, China; 2. Southwest Jiaotong University, Chengdu 614202, China; 3. China Road and Bridge Co, Beijing 100011, Chin)
出处
《建筑科学》
CSCD
北大核心
2018年第3期76-81,共6页
Building Science
基金
"十三五"国家科技支撑计划项目课题"利用火山灰渣制备绿色建筑材料关键技术研究与应用"2016YFC0701002
关键词
火山渣
轻骨料混凝土
颗粒级配
堆积密度
砂率
volcanic
lightweight aggregate concrete
grain size distribution
packing density
sand ratio
