刚性聚丙烯纤维改性透水混凝土耐久性能研究  

Durability performance research on permeable concrete with rigid polypropylene fiber

作　　者：刘肖凡[1] 林武星[1] 李继祥[1] 

机构地区：[1]武汉轻工大学土木工程与建筑学院,湖北武汉430023

出　　处：《混凝土》2017年第1期133-136,共4页Concrete

基　　金：国家自然科学基金项目(51474168)

摘　　要：为研究刚性聚丙烯纤维的掺入对透水混凝土材料耐久性能的影响,试验室中对4种掺量的钢纤维改性透水混凝土分别进行了冻融循环试验和硫酸盐干湿循环试验。研究表明随着纤维掺量的增加,透水混凝土的抗冻融性能和抗硫酸盐干湿循环性能均有提升,1%体积掺量的刚性聚丙烯纤维改性透水混凝土具备较好的耐久性能。对透水混凝土的冻融指标评定应以质量损失率为主,纤维一定程度上承担了基体冻融过程中的体积膨胀应力和硫酸盐循环中的结晶压力,对透水混凝土有效的发挥了阻裂和增强作用。In order to study the durability performance of permeable concrete with rigid polypropylene fiber, four groups specimens with different volume ratio of polypropylene fiber are tested.Experiments show that with the increase of polypropylene fiber, the freeze-thaw resistance property and dry-wet cycle property of permeable concrete are enhanced.Permeable concrete with 1% volume ratio fiber has better durability performance.The mass loss ratios should be the key factor for the freeze-thaw index of permeable concrete.Fibers take parts stress of volume expansion while the permeable concrete endure freeze and dry-wet cycle, which increase the anti-creak and strengthen performance of permeable concrete.

关 键 词：刚性聚丙烯纤维 透水混凝土 抗冻融 干湿循环 

分 类 号：TU528.572[建筑科学—建筑技术科学]