武汉工程大学学报2012，Vol.34Issue(9)：17-21,5.DOI:10.3969/j.issn.1674-2869.2012.09.005
混杂纤维对高性能混凝土拉压比的影响
Effect of hybrid fiber on tension-compression ratio of high performance concrete
摘要
Abstract
In order to investigate the effect of hybrid fiber ( steel fiber and polypropylene fiber) on tension-compression ratio of high performance concrete (HPC) , 18 different groups of specimens with steel fiber and polypropylene fiber and 1 group contradistinctive HPC specimen were designed according to the orthogonal experiment. The splitting tensile strength and compressive strength were tested by standard test method. The contributory factors such as the characteristic parameters of steel fiber (types, volume fraction, aspect ratio) and the volume fraction of polypropylene fiber were analyzed. Influence of all kinds of factors on tension-compression ratio of hybrid fiber reinforced high performance concrete was compared by direct-viewing analysis of the orthogonal experimental design. Experimental results illuminate that hybrid fibers make the failure process of high performance concrete ductile damage change from brittle failure into ductility failure, the maximum value of ratio between splitting tensile strength and compressive strength increases by 26. 2% and the average value increases by 9.9%. Among four factors which influence tension-compression ratio of HPC, the most important factor is the type of steel fiber, the second factor is polypropylene fiber volume fraction, the least one is length/ diameter aspect ratio of steel fiber. Thus adding a reasonable volume of hybrid fibers into high performance concrete can increase tension-compression ratio, so as to improve toughness.关键词
混杂纤维/正交试验/劈裂抗拉强度/立方体抗压强度/韧性Key words
hybrid fiber/splitting tensile strength/compressive strength/orthogonal experiment/toughness/tension-compression ratio分类
建筑与水利引用本文复制引用
刘胜兵,徐礼华..混杂纤维对高性能混凝土拉压比的影响[J].武汉工程大学学报,2012,34(9):17-21,5.基金项目
湖北省教育厅青年科学基金(B200514003) （B200514003）
武汉工程大学科学研究基金(13105021) （13105021）
