摘要
对比研究了粗骨料种类、最大粒径、针片状颗粒含量及空隙率对C60混凝土徐变性能的影响规律。结果表明,分别采用花岗岩及石灰岩取代砂岩,C60混凝土的90 d徐变度分别降低了47%及53%;公称粒径由5~20 mm分别调整为5~31.5 mm及5~25 mm,C60混凝土的90 d徐变度分别降低了40%及70%;针片状颗粒含量由8%降低到5%,C60混凝土的90 d徐变度降低了12%;空隙率由46.3%分别降低到44.1%及43.4%,C60混凝土的90 d徐变度分别降低了5%及11%。各因素对徐变度影响大小的顺序为公称粒径≈粗骨料种类>针片状颗粒含量≈空隙率。
The influence law of coarse aggregate type,maximum particle size,needle-flake content and void ratio on creep performance of C60 concrete was studied by comparison.The results show that compared with the results of C60 concrete doped with sandstone,the creep degree of C60 concrete doped with granite and limestone was reduced by 47%and 53%respectively.The creep degree of C60 concrete in 90 d is reduced by 40%and 70%respectively when the nominal particle size changes from 5~20 mm to 5~31.5 mm and 5~25 mm.The creep degree of C60 concrete in 90 d is reduced by 12%,when the needle-flake content is reduced from 8%to 5%.The creep degree of C60 concrete in 90 d decreases 5%and 11%respectively after the void ratio decreases from 46.3%to 44.1%and 43.4%.The order of influence of each factor on creep degree is nominal particle size range≈coarse aggregate type>needle flake content≈void ratio.
作者
周敏
杨腾宇
邱冰
郭立贤
宋普涛
王良波
王晶
冷发光
ZHOU Min;YANG Tengyu;QIU Bing;GUO Lixian;SONG Putao;WANG Liangbo;WANG Jing;LENG Faguang(Foshan Transportation Science and Technology Co.Ltd.,Foshan 528042,China;China Academy of Building Research,Beijing 100013,China;Foshan Road and Bridge Supervision Station Co.Ltd.,Foshan 528042,China)
出处
《新型建筑材料》
2021年第8期21-24,共4页
New Building Materials
基金
佛山市科技创新项目(1920001001168)。
关键词
C60低徐变混凝土
徐变度
粗骨料种类
粗骨料最大粒径
C60 low creep concrete
creep degree
type of coarse aggregate
maximum size of coarse aggregate
