爆破2025，Vol.42Issue(3)：18-25,8.DOI:10.3963/j.issn.1001-487X.2025.03.003
聚乙烯醇纤维再生混凝土动态压缩力学性能试验研究
Experimental Investigation on Dynamic Compressive Mechanical Properties of PVA Fiber-reinforced Recycled Aggregate Concrete
摘要
Abstract
To enhance the mechanical performance of recycled aggregate concrete(RAC)under dynamic load-ing,this study systematically investigates the synergistic effects of polyvinyl alcohol(PVA)fiber reinforcement and recycled coarse aggregate(RCA)replacement on the dynamic mechanical performance of RAC through split Hopkin-son pressure bar(SHPB)impact compression tests.Thirty-six specimen groups with varying PVA fiber dosages(0％,0.1％,0.3％)and RCA replacement ratios(30％,40％,50％)were designed to elucidate the damage mechanisms and enhancement mechanisms of PVA fiber-reinforced recycled aggregate concrete(PVA-RAC)under impact load-ing,utilizing comprehensive analyses of dynamic stress-strain curves,failure patterns,and dynamic increase factors(DIF).The results demonstrate that PVA fibers significantly suppress crack propagation via bridging effects,thereby altering the material's failure mode from brittle fragmentation to ductile cracking.Both dynamic peak stress and DIF exhibit substantial improvements with increasing fiber content and strain rate.While higher RCA replacement ratios(40％～50％)diminish compressive strength due to the inherent porosity of RCA,their heterogeneous interfacial properties promote energy dissipation through complex crack propagation paths,thereby partially mitigating strength losses.This study establishes a theoretical framework for the dynamic design and application of PVA-RAC in seismic-resistant protective structures.Furthermore,it pioneers a synergistic approach to integrating construction waste recy-cling with the development of high-performance recycled building materials.The findings have both theoretical inno-vation and practical engineering significance.关键词
聚乙烯醇纤维再生混凝土/动态压缩/力学性能/分离式霍普金森压杆/动态增长因子Key words
PVA fiber-reinforced recycled aggregate concrete/dynamic compression/mechanical property/split Hopkinson pressure bar/dynamic increase factor分类
建筑与水利引用本文复制引用
彭胜,吴佳隆,何理,钟东望,谢先启,蔡路军..聚乙烯醇纤维再生混凝土动态压缩力学性能试验研究[J].爆破,2025,42(3):18-25,8.基金项目
湖北省自然科学基金资助项目(2022CFB662) （2022CFB662）
武汉市知识创新专项项目曙光计划项目(2023020201020403) （2023020201020403）
江汉大学精细爆破全国重点实验室开放基金(PBSKL2022D05) Natural Science Foundation of Hubei Province funding project(2022CFB662),Wuhan Knowledge Innovation Special Project Dawn Plan Project(2023020201020403),Open Fund of State Key Laboratory of Precision Blasting,Jianghan University(PBSKL2022D05) （PBSKL2022D05）
