Experimental Study on Cracking Resistances of RAC Beams with Polypropylene Fibers and Steel Fibers

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Tang, Jiajun^1 ; Pei, Changchun^1

Department of Structural Engineering, College of Engineering, Yanbian University, Yanji, Jilin

133000, China^1

关键词: Cracking resistance;    Hybrid fiber;    Incorporation rates;    Mixing method;    Polypropylene fiber;    Practical engineering;    Recycled aggregate concrete;    Recycled coarse aggregate;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/3/032040/pdf
DOI  :  10.1088/1755-1315/233/3/032040

来源: IOP

【 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.