改性橡胶混凝土的力学性能和抗冻融性能研究  

Study on Mechanical Properties and Freeze-thaw Resistance of Modified Rubber Concrete

作　　者：柏旗 苏有文[1] 吕雄飞 BAI Qi;SU Youwen;LYU Xiongfei(Southwest University of Science and Technology,Mianyang 621000,China;University of Shanghai for Science and Technology,Shanghai 200082,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621000 [2]上海理工大学,上海200082

出　　处：《橡胶工业》2023年第2期91-96,共6页China Rubber Industry

摘　　要：在橡胶混凝土中复掺聚丙烯纤维和粉煤灰,研究其掺量对橡胶混凝土力学性能和抗冻融性能的影响。结果表明:橡胶混凝土的抗压强度和抗拉强度均随聚丙烯纤维掺量的增大先增大后减小,随粉煤灰掺量的增大而呈减小的趋势;在整个冻融循环进程中,复掺聚丙烯纤维和粉煤灰橡胶混凝土的相对动弹性模量降幅小于素橡胶混凝土,抗冻融损伤能力提高;在本试验聚丙烯纤维和粉煤灰掺量范围内,聚丙烯纤维掺量为10 kg·m-3、粉煤灰掺量(以替代水泥的质量百分比计)为14%~16%时,橡胶混凝土的综合性能最优。Polypropylene fiber and fly ash were mixed with rubber concrete,and the effect of their contents on the mechanical properties and freeze-thaw resistance of rubber concrete was studied.The results showed that the compressive strength and tensile strength of the rubber concrete first increased and then decreased with the increase of polypropylene fiber content,and decreased with the increase of fly ash content.In the whole freeze-thaw cycle,the relative dynamic elastic modulus of the polypropylene fiber and fly ash filled rubber concretes decreased less than that of the unfilled rubber concrete,and the freeze-thaw damage resistance was improved.In this test,the overall performance of the rubber concrete was the best when the polypropylene fiber content was 10 kg·m^(-3) and the fly ash content was 14%~16%(based on the mass percentage of the substituted cement).

关 键 词：橡胶混凝土 聚丙烯纤维 粉煤灰 力学性能 抗冻融性能 

分 类 号：TQ333.99[化学工程—橡胶工业] U414.18[交通运输工程—道路与铁道工程]