复合桥面铺装混凝土早期裂缝成因分析与预防措施  

Cause Analysis and Prevention Measures on Early Crack of Concrete Used in Composite Deck Pavement

作　　者：仲新华[1] 靳进钊[2] 李享涛[1] 张军朝[2] 楼梁伟[1] 刘建军[2] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]河北省邢汾高速公路筹建处,河北邢台054000

出　　处：《施工技术》2013年第S1期172-175,共4页Construction Technology

摘　　要：针对复合桥面铺装中混凝土早期开裂的常见病害,从铺装层混凝土干燥收缩变形的影响因素和约束类型分析了裂缝的形成原因。开展了不同胶凝材料用量和不同养护方式下混凝土塑性和硬化收缩变形性能研究,并从结构措施、混凝土材料和施工工艺等方面提出了减少收缩变形和改善约束的技术措施。According to the common diseases(i.e.early cracks) of concrete used in composite deck pavement,causes of the early cracks were analyzed from impact factors of drying shrinkage of pavement concrete and its constraints.Research on the plastic and hardening shrinkage of concrete with different cementations materials content or curing conditions was carried out,and technical measures to reduce shrinkage deformation and constraints was proposed from the aspects of structural design,concrete materials and construction technology.

关 键 词：桥面铺装 混凝土 裂缝 干燥收缩 约束 

分 类 号：U443.33[建筑科学—桥梁与隧道工程] U445.71[交通运输工程—道路与铁道工程]