期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：3
页码：032040
DOI：10.1088/1755-1315/233/3/032040
出版社：IOP Publishing
摘要：The recycled coarse aggregate has poor mechanical properties and cracking resistances due to its own defects, which hinders the application of recycled aggregate concrete (RAC) in practical engineering. In this paper, the cracking resistances of RAC beams were studied by changing the volume incorporation rates and mixing methods of polypropylene fibers and steel fibers. The results show that the cracking width of RAC beams decreases, but the number of cracks is relatively larger when they are destroyed, compared with RAC beams. The ductility of RAC beams with fibers is relatively better. Through the experimental study and theoretical analysis, the formula for calculating the maximum cracking width of RAC beams with hybrid fibers is derived.
