废弃PP纤维再生混凝土基本力学性能试验  

Experiment on Basic Mechanical Properties of Waste PP Fiber Recycled Concrete

作　　者：王建超[1] 李梦飞 赵丰磊 WANG Jianchao;LI Mengfei;ZHAO Fenglei(School of Science,Shenyang Jianzhu University,Shenyang,China,110168;School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Jiangsu Transportation Institute Group,Nanjing,China,210017)

机构地区：[1]沈阳建筑大学理学部,辽宁沈阳110168 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168 [3]苏交科集团股份有限公司,江苏南京210017

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第1期105-113,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52108235)。

摘　　要：目的 针对纤维体积掺量、长径比、再生骨料取代率等因素,探究废弃PP纤维对再生混凝土力学性能的影响,提高废弃纤维利用率。方法 以废弃PP打包带制成不同长径比的纤维作为筋材,以不同体积掺量与不同再生骨料取代率的再生混凝土混合制成11组废弃PP纤维再生混凝土试块,对其进行抗压和抗拉试验。结果 立方体抗压、抗拉强度最佳时的废弃PP纤维体积掺量为1.5%,长径比为47.85;废弃PP纤维再生混凝土的立方体抗压、抗拉强度与再生骨料取代率有关,其强度与再生骨料取代率近似呈线性关系。结论 废弃PP纤维的掺入可以提高再生混凝土的立方体抗压强度和抗拉强度。The work aims to explore the influence of waste PP fiber on the mechanical properties of recycled concrete according to the factors such as fiber volume content,aspect ratio and recycled aggregate replacement rate,so as to improve the utilization rate of waste fiber.Methods 11 groups of waste PP fiber recycled concrete test blocks were prepared by mixing waste PP fiber with different length-diameter ratio as reinforcement and recycled concrete with different volume content and different recycled aggregate replacement rate.The results showed that the volume fraction and length-diameter ratio of waste PP fiber were 1.5%and 47.85 respectively when the cube compressive strength and splitting tensile strength were the best.At the same time,the cube compressive strength and tensile strength of waste PP fiber recycled concrete are also related to the replacement rate of recycled aggregate,and its strength is approximately linear with the replacement rate of recycled aggregate.The test proves that the incorporation of waste PP fiber can enhance the recycled concrete and affect the improvement of cube compressive strength and splitting tensile strength.

关 键 词：再生混凝土 废弃PP纤维 再生骨料取代率 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]