聚乙烯醇掺量对桥面铺装混凝土性能的影响  

Influence of polyvinyl alcohol content on properties of bridge deck concrete

作　　者：李洋 刘杨 LI Yang;LIU Yang(Jinan Maintenance Center of Jinan-Qingdao Expressway,Shandong High-Speed Co.,Ltd.,Jinan 250014,China;Jinan Ruixin Road and Bridge Maintenance Co.,Ltd.,Jinan 250100,China)

机构地区：[1]山东高速股份有限公司济青济南养护分中心,山东济南250014 [2]济南瑞鑫路桥养护有限公司,山东济南250105

出　　处：《山东交通学院学报》2021年第2期38-42,共5页Journal of Shandong Jiaotong University

摘　　要：为研究聚乙烯醇掺量对桥面铺装混凝土性能的影响,对比分析不同聚乙烯醇掺量的桥面铺装混凝土的坍落度、不同养护龄期下的力学性能、收缩性能及28 d龄期的抗渗性能。研究结果表明:适量的聚乙烯醇可提高桥面铺装混凝土的坍落度;随着聚乙烯醇掺量的增加,混凝土的抗压强度和抗弯拉强度先增加后降低,收缩性能先降低,在养护后期趋于稳定,抗渗性能显著提升。综合考虑聚乙烯醇掺量对桥面铺装混凝土性能的影响以及工程造价,推荐聚乙烯醇在桥面铺装混凝土中的最佳掺量为水泥质量的1.0%。In order to study the influence of polyvinyl alcohol content on the properties of bridge deck concrete,the relationship between the polyvinyl alcohol content and the properties of bridge deck concrete is analyzed by comparing the slump,the mechanical strength,shrinkage properties of bridge deck concrete with different curing ages,and the impermeability of bridge deck concrete with the curing age of 28 days.The results show that the appropriate amount of polyvinyl alcohol can improve the slump of bridge deck concrete.The compressive strength and flextural strength increase first and then decrease with the increase of polyvinyl alcohol content.The drying shrinkage of bridge deck concrete decreases with the increase of polyvinyl alcohol content and tends to be stable at the later stage of curing.The impermeability of bridge deck concrete goes up with the increase of polyvinyl alcohol content.Considering the influence of polyvinyl alcohol content on the properties of bridge deck concrete and the project cost,it is recommended that the optimal content of polyvinyl alcohol in bridge deck concrete should be 1.0%.

关 键 词：聚乙烯醇 桥面铺装混凝土 坍落度 力学性能 收缩性能 抗渗性能 

分 类 号：U414[交通运输工程—道路与铁道工程]