橡胶与纤维协同作用下柔性混凝土配合比设计研究  

Study on Mix Design of Flexible Concrete Under Synergistic Effect of Rubber and Fiber

作　　者：邓云纲[1] DENG Yun-gang(China Railway Siyuan Survey and Design Group Co,Ltd,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《建材世界》2025年第2期33-36,共4页The World of Building Materials

基　　金：中铁第四勘察设计院集团有限公司重点研发项目(2021K066).

摘　　要：为了提高预制装配式路面板的柔性与抗弯性能,探讨橡胶颗粒与纤维协同作用对水泥混凝土力学性能的影响。首先,通过等体积取代细骨料法,将橡胶颗粒分别以5%、10%、15%和20%的比例引入基准C40混凝土中,测试抗压、弹性模量、劈裂抗拉和抗折性能。结果表明,10%橡胶取代率在略降抗压性能的同时,显著提升了劈裂抗拉强度。随后,在此基础上分别复掺玄武岩纤维和聚丙烯纤维,比较不同纤维种类及掺量对混凝土综合性能的影响。试验结果显示,在相同掺量下,玄武岩纤维对混凝土抗折和弯曲韧性的改善更为明显,最佳配合比为10%橡胶颗粒与1%玄武岩纤维的组合。This study aims to enhance the flexibility and bending performance of precast pavement panels by investigating the combined effects of rubber particles and fibers on the mechanical properties of cement concrete.Initially,rubber particles were incorporated into C40 concrete by replacing fine aggregates at 5%,10%,15%,and 20%volume ratios,and the compressive strength,elastic modulus,splitting tensile strength,and flexural strength were evaluated.Results indicate that a 10%replacement maintains adequate compressive strength while significantly enhancing splitting tensile strength.Subsequently,basalt and polypropylene fibers were added to assess the influence of different fiber types and dosages on the overall performance.The experimental findings reveal that basalt fibers improve flexural strength and bending toughness more effectively than polypropylene fibers under equivalent dosages,with the optimal combination being 10%rubber particles and 1%basalt fibers.

关 键 词：橡胶颗粒 纤维 柔性混凝土 预制铺面 抗弯性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]