摘要
文中旨在提升再生砖粉混凝土的力学性能,研究了钢纤维长度(20、50mm及其混合)和再生砖粉替代率(0%、5%、10%、15%)对再生砖粉混凝土抗压强度、抗弯强度和劈裂抗拉强度的影响。结果表明钢纤维显著提升力学性能,其中混合纤维(0.5%20mm+0.5%50mm)效果最优,抗压、抗弯和劈裂抗拉强度分别提高43.98%、43.31%和44.08%。再生砖粉替代率增加会降低强度,15%替代率时抗压强度下降8.06%,但5%替代率对性能影响较小,结合钢纤维可部分弥补强度损失。最优配合比为5%再生砖粉替代率和1%混合钢纤维。研究为再生砖粉混凝土的工程应用提供科学支撑。
This study aims to enhance the mechanical properties of recycled brick powder concrete by investigating the effects of steel fiber length(20,50 mm,and a combination of both)and recycled brick powder replacement ratio(0%,5%,10%,15%)on compressive strength,flexural strength,and splitting tensile strength.The results show that steel fibers significantly improve mechanical performance,with the best results achieved using a hybrid fiber mix(0.5%20 mm+0.5%50 mm),which increased compressive,flexural,and splitting tensile strengths by 43.98%,43.31%,and 44.08%,respectively.Increasing the replacement ratio of recycled brick powder reduces strength,with an 8.06%decrease in compressive strength at 15%replacement;however,a 5%replacement has minimal impact,and the addition of steel fibers can partially compensate for strength loss.The optimal mix design was determined to be 5%brick powder replacement with 1%hybrid steel fibers.This study provides scientific support for the engineering application of recycled brick powder concrete.
作者
何俊杰
HE Junjie(Sichuan Shudao Construction Engineering Co.,Ltd.,Chengdu 610000,China)
出处
《低温建筑技术》
2025年第7期122-125,共4页
Low Temperature Architecture Technology
关键词
再生砖粉混凝土
钢纤维
再生砖粉
替代率
recycled brick powder concrete
steel fiber
recycled brick powder
replacement rate
