Effects of Waste Hybrid Fibers with Different Mixing Ratios on Properties of Recycled Concrete

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Tian, Sisi^1 ; An, Hao^1 ; Hu, Zhengfu^1 ; Pei, Changchun^1

Department of Civil Engineering, Yanbian University, Yanji, Jilin

133002, China^1

关键词: Coarse aggregates;    Environmental pollutions;    Performance and applications;    Recycled coarse aggregate;    Recycled concretes;    Splitting tensile strength;    Strengthening effect;    Waste polypropylene;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/2/022043/pdf
DOI  :  10.1088/1757-899X/563/2/022043

来源: IOP

【 摘 要 】

In order to improve the performance and application scope of recycled concrete and reduce environmental pollution, fly ash and recycled coarse aggregate of waste concrete were used to replace part of cement and part of natural coarse aggregate respectively, and recycled concrete of base group was mixed. The mixing amount of waste polypropylene fibers and basalt fibers was changed in recycled concrete of base group, and its fluidity and mechanical properties were analyzed. The experimental results show that the mixed fibers have little effect on the fluidity of recycled concrete, but the compressive strength, flexural strength and elastic modulus all decrease. However, they can enhance the splitting tensile strength of recycled concrete, and the strengthening effect is more obvious with the increase of the blending ratio of waste polypropylene fibers.