南阳师范学院学报2026，Vol.25Issue(3)：56-62,7.
基于多尺度试验的聚丙烯纤维泡沫混凝土性能与破坏机制研究
Investigation on Performance and Failure Mechanism of Polypropylene Fiber-Reinforced Foam Concrete Based on Multi-Scale Testing
摘要
Abstract
An experimental investigation was conducted on polypropylene fiber-reinforced foam concrete with var-ying fiber volume fractions(0,0.24%,0.48%,0.72%)to evaluate its fluidity,water absorption,static uniax-ial compression performance,and static splitting tensile strength.A multi-scale analysis integrating macroscopic failure patterns and pore structure characterization under optical microscopy was performed to elucidate the influ-ence of polypropylene fibers on the mechanical properties and failure mechanisms of foam concrete.The results indicate that the water absorption rate first decreases and then increases with the fiber content.An appropriate amount of fibers(0.48%)can significantly enhance the compressive strength and tensile strength of the speci-mens.And the internal fibers inhibit crack propagation through bridging,causing the failure mode to change from brittle crushing type to shear slip type,showing a significant increase in ductility.However,excessive fibers(0.72%)will reduce fluidity and cause local disorder of pore structure,with limited improvement in me-chanical properties.Optical microscopic observation further reveals that fibers with a reasonable dosage can opti-mize pore distribution and enhance overall density and toughness.关键词
聚丙烯纤维/泡沫混凝土/破坏机制/多尺度分析Key words
polypropylene fiber/foam concrete/failure mechanism/multi-scale analysis分类
建筑与水利引用本文复制引用
李梦阳,王聪,王长达,陈小可,王军国,贾虎..基于多尺度试验的聚丙烯纤维泡沫混凝土性能与破坏机制研究[J].南阳师范学院学报,2026,25(3):56-62,7.基金项目
精细爆破国家重点实验室开放基金项目"多抱孔脆性材料冲击动态响应特性与影响因素研究"(PBSKL-2022-C-08) （PBSKL-2022-C-08）
河南省科技攻关项目"3D打印骨架增强绿色混凝土复合材料制备与静动态性能研究"(242102230145) （242102230145）
校级科研项目"非均质性岩石的爆破破裂特征及其细观损伤演化机制研究"(2026PY026). （2026PY026）
