高效保湿养护膜在桥梁墩身混凝土养护中的应用  

Application of High-efficiency Moisturizing Curing Film to Concrete Curing of Bridge Pier

作　　者：徐勇[1] 赵鹏鑫 刘战利 李辉 曹继涛 栗少清 XU Yong;ZHAO Pengxin;LIU Zhanli;LI Hui;CAO Jitao;LI Shaoqing(CCCC Second Highway Engineering Co.Ltd.,Xi’an 710000,China;Xiong’an High Speed Railway Co.Ltd.,Xiong’an Hebei 071800,China;Sichuan Tieke Construction Supervision Co.Ltd.,Chengdu 611731,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中交第二公路工程局有限公司,西安710000 [2]雄安高速铁路有限公司,河北雄安071800 [3]四川铁科建设监理有限公司,成都611731 [4]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2021年第7期59-61,79,共4页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(P2018G004-F);中国铁道科学研究院集团有限公司基金(2018YJ175)。

摘　　要：针对桥梁墩身混凝土洒水养护耗水量大、人工作业频繁且保湿效果不佳的问题,在新建北京—雄安城际铁路进行了墩身混凝土高效保湿养护膜的应用试验。结果表明:采用高效保湿养护膜可实现对墩身混凝土长时间的高效保湿养护,28 d龄期墩身混凝土养护膜内湿度为96.1%;与洒水养护相比,采用高效保湿养护膜养护28 d龄期墩身混凝土气体渗透系数下降了78.3%,56 d龄期混凝土表层碳化深度降低了38.1%,回弹强度增加了6.3%,混凝土表面密实性显著提高;采用高效保湿养护膜不仅可以提升养护质量,而且操作简便,省时省工,节约水资源,具有较好的社会效益和经济效益。Aiming at the large water consumption,frequent manual operation and ineffective moisturizing situation resulted from water-spreading curing method for bridge pier concrete,the application test of high-efficiency moisturizing curing film for pier concrete was carried out in the new Beijing-Xiong’an intercity railway.The results show that the high-efficiency moisturizing curing film can realize the long-time high-efficiency moisturizing curing of pier concrete,and the humidity in the curing film of pier concrete at 28 day is 96.1%.Compared with water-spreading curing,the gas permeability coefficient of 28 day pier concrete cured with high-efficiency moisturizing curing film decreased by 78.3%,the carbonation depth of 56 day concrete surface decreased by 38.1%,the rebound strength increased by 6.3%,and the surface compactness of concrete improved significantly.The use of high-efficiency moisturizing curing film can not only improve the quality of curing,but also be easy to operate,save time and labor,save water resources,and have better social and economic benefits.

关 键 词：工程材料 高效保湿养护 现场试验 墩身混凝土 养护膜 湿度 气体渗透系数 

分 类 号：U528[交通运输工程]