活性粉末混凝土预应力箱梁施工技术研究  

Construction Technology of Reactive Powder Concrete Prestressed Box Girder

作　　者：王晓杰 WANG Xiaojie(China Railway Urban Construction Group Corporation Limited,Changsha,Hunan 410208,China)

机构地区：[1]中铁城建集团有限公司,湖南长沙410208

出　　处：《中外公路》2024年第1期141-146,共6页Journal of China & Foreign Highway

基　　金：中铁城建集团有限公司科技研发计划项目(编号:ZTCJ1⁃2016⁃11)。

摘　　要：目前的高强与高性能混凝土存在抗折强度不高、脆性大、体积稳定性不良等缺点,活性粉末混凝土(RPC)是一种新型材料,具有良好的力学性能和高抗渗性,能够更大程度地降低混凝土用量和结构自重,从而达到安全可靠、节约成本的目的。该文将活性粉末混凝土应用于公路预应力箱梁中,通过创新优化配合比、改变传统运输工艺、蒸气养生棚养生技术研究,有效缩短活性粉末混凝土的浇筑时间,保证浇筑质量和强度。At present,high-strength and high-performance concrete has some disadvantages,such as low flexural strength,large brittleness,and poor volume stability.Reactive powder concrete(RPC)is a new type of material,which has good mechanical properties and high impermeability.It can reduce the amount of concrete to a greater extent and reduce the weight of the structure,achieving the purpose of safety,reliability,and cost saving.This paper applied RPC to highway prestressed box girder.Through the innovation and optimization of mix ratio,the change in traditional transportation technology,and curing technology research of steam curing shed,it effectively shortens the pouring time of RPC,ensuring the pouring quality and strength.

关 键 词：活性粉末混凝土 箱梁 配合比 运输工艺 养生技术 

分 类 号：U444[建筑科学—桥梁与隧道工程] U445[交通运输工程—道路与铁道工程]