辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(6)：662-670,9.DOI:10.11956/j.issn.1008-0562.20240019
冻融循环作用下聚丙烯纤维混凝土抗拉性能及孔隙结构特征
Tensile properties and pore structure features of polypropylene fiber reinforced concrete under freeze-thaw cycles
摘要
Abstract
In order to improve the mechanical properties of concrete under freeze-thaw environment,the tensile properties of concrete and the development of pore structure under different polypropylene fiber content and freeze-thaw cycles were studied by splitting tensile test and nuclear magnetic resonance test(NMR).The research result shows that the content of polypropylene fibers is positively correlated with the splitting tensile strength and peak tensile strain of concrete.The number of freeze-thaw cycles is negatively correlated with the splitting tensile strength,but positively correlated with the peak tensile strain.The pore volume of concrete is positively correlated with the number of freeze-thaw cycles,but negatively correlated with the content of polypropylene fibers.A relationship formula was established between the content of polypropylene fibers,the number of freeze-thaw cycles,and the splitting tensile strength.The pore size with the greatest impact on the splitting tensile strength of concrete is(100,500]μm,followed by(500,1 000]μm,and the impact of pore size(10,100]μm is relatively small.The research results provide theoretical support for improving the performance of concrete in freeze-thaw environments.关键词
混凝土/聚丙烯纤维/冻融循环/劈裂抗拉强度/峰值拉应变/孔隙结构Key words
concrete/polypropylene fibers/freeze-thaw cycles/split tensile properties/peak tensile strain/pore structure分类
建筑与水利引用本文复制引用
程功,程亚丽,赵立财,周飞..冻融循环作用下聚丙烯纤维混凝土抗拉性能及孔隙结构特征[J].辽宁工程技术大学学报（自然科学版）,2024,43(6):662-670,9.基金项目
辽宁省"兴辽英才计划"青年拔尖人才项目(XLYC2007146) （XLYC2007146）
