湖南大学学报（自然科学版）2018，Vol.45Issue(3)：47-54,8.DOI:10.16339/j.cnki.hdxbzkb.2018.03.006
含粗骨料超高性能混凝土力学性能研究
Study on Mechanical Properties of Ultra High Performance Concrete with Coarse Aggregate
摘要
Abstract
Due to the problems of large amount of cementitious material and high cost of Ultra High Performance Concrete (UHPC),the UHPC system was mixed with coarse aggregate and river sand in-stead of quartz sand,and the preparation of UHPC with coarse aggregate is successful resulting in excel-lent mechanical properties.Meanwhile,the effects of the coarse aggregate content and geometric parame-ters of the steel fiber on the mechanical properties of the UHPC with coarse aggregate were studied.The results showed that,with the increase of coarse aggregate content (0~800 kg/m3),the compressive strength of UHPC increased firstly and then decreased,the elastic modulus increased almost linearly. When the content of coarse aggregate was in 0~400 kg/m3,the flexural strength and initial crack strength of UHPC changed little,while when the content of coarse aggregate was 400~800 kg/m3,the flexural strength and initial crack strength of UHPC decreased obviously.With the increase of the content of coarse aggregate (0~800 kg/m3),the flexural load-deflection curve of UHPC was obviously changed,and the flexural toughness decreased obviously,but a strain-hardening process was observed.With the increase of the length of steel fiber,the compressive strength,flexural strength and flexural toughness of UHPC in-creased,but the static compression modulus and initial crack strength of UHPC changed little.关键词
超高性能混凝土/粗骨料/力学性能/弯曲韧性Key words
Ultra High Performance Concrete(UHPC)/coarse aggregate/mechanical properties/flex-ural toughness分类
建筑与水利引用本文复制引用
黄政宇,李仕根..含粗骨料超高性能混凝土力学性能研究[J].湖南大学学报（自然科学版）,2018,45(3):47-54,8.基金项目
国家自然科学基金资助项目(U1305245),National Natural Science Foundation of China(U1305245) （U1305245）
