SELECTION OF DURABLE CLOSURE POUR MATERIALS FOR ACCELERATED BRIDGE CONSTRUCTION
With the publics demands for reduced construction time and traveling delays,full-depth precast bridge decks or decked bulb tees (DBTs) are being more widely used.When these systems are used,precast elements are brought to the construction site ready to be set in place and quickly joined together.Then,a concrete closure pour completes the connection.The selection of closure pour materials is critical.The procedure and methods for selecting durable closure pour (CP) materials are discussed in this paper.The accelerated construction is quantified as two categories:overnight cure of CP materials and 7-day cure of CP materials.For both categories,candidate materials are selected first based on literature review of published data as well as tests of compressive strength and flow and workability.Then,the performance criteria for selecting durable CP materials for both categories is developed based on durability tests of selected candidate materials.These durability tests include freezing-and-thawing durability,shrinkage,bond,and permeability tests.
Closure pour materials grout HPC chloride penetration freezing-and-thawing durability shrinkage performance criteria
Peng Zhu Zhongguo John Ma
Department of Building Engineering, Tongji University, Shanghai 200092, P.R.China Department of Civil and Environmental Engineering, University of Tennessee Knoxville Knoxville, TN 3
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
761-769
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）