聚丙烯-钢混杂纤维对粉煤灰混凝土抗盐冻性能的影响研究  

Study on Effect of Polypropylene and Steel Hybrid Fiber on Salt-Freezing Resistance of Fly Ash Concrete

作　　者：阴琪翔 张梦钵 刘阳 宋晓吉 YIN Qixiang;ZHANG Mengbo;LIU Yang;SONG Xiaoji(School of Architecture and Construction,Jiangsu Vocational Institute of Architectural Technology,Xuzhou Jiangsu 221116,China;School of Building Engineering and Intelligent Construction,Zhengzhou Vocational University of Information and Technology,Zhengzhou Henan 450046,China)

机构地区：[1]江苏建筑职业技术学院建筑建造学院,江苏徐州221116 [2]郑州信息科技职业学院建筑工程与智能建造学院,河南郑州450046

出　　处：《当代化工》2024年第11期2555-2559,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金青年科学基金资助项目(项目编号:52004105);江苏省高等学校自然科学研究重大项目资助项目(项目编号:22KJA560001);徐州市重点研发计划项目(项目编号:KC20199)。

摘　　要：纤维添加可以有效提升混凝土抗盐冻性能。基于此,制备了钢纤维与聚丙烯纤维质量比为9∶1的混凝土试样,开展总纤维质量分数变化对混凝土抗盐冻性能的影响规律研究,分析了混凝土抗压强度、劈裂抗拉强度、质量损失率、相对动弹性模量和氯离子扩散系数随纤维质量分数的变化规律。结果表明:混凝土的抗压强度和抗拉强度均随纤维质量分数的增大而呈现先增后减的变化规律;混凝土的抗压强度、劈裂抗拉强度以及相对动弹性模量均随着盐冻循环次数的增加而逐渐降低,聚丙烯-钢混杂纤维质量分数为0.8%~1.2%时,粉煤灰混凝土的抗盐冻能力最好;聚丙烯-钢混杂纤维质量分数为0.8%时,混凝土在盐冻环境下的抗氯离子腐蚀能力最强。Fiber addition can effectively improve the salt-freezing resistance of concrete.Based on this,a concrete sample with a steel fiber to polypropylene fiber ratio of 9∶1 was prepared.The effect of the total fiber content change on the salt-freezing resistance of concrete was studied,and the change law of the concrete compressive strength,tensile strength,mass loss rate,relative dynamic elastic modulus and chloride ion diffusion coefficient with different fiber content was analyzed.The results showed that,the compressive strength and tensile strength of concrete increased first and then decreased with the increase of fiber content;the compressive strength,splitting tensile strength and dynamic elastic modulus of concrete decreased gradually with the increase of the number of salt-freezing cycles;when the polypropylene-steel hybrid fiber was 0.8%~1.2%,the salt-freezing resistance of fly ash concrete was the best;when the content of polypropylene and steel hybrid fiber was 0.8%,the chloride ion corrosion resistance of concrete in the salt-frozen environment was the strongest.

关 键 词：聚丙烯纤维 钢纤维 粉煤灰 混凝土 抗盐冻性能 

分 类 号：TQ178[化学工程—硅酸盐工业] TU528[建筑科学—建筑技术科学]