COLD JOINTS OF THIN-WALLED UHPFRC STRUCTURES
Ultra-High Performance Fiber Reinforced concrete might be used for a specific application with very complex design and very complex shape.Because of high durability and excellent material properties, innovative (thin-walled, shell) structures should be designed.Usually, in design UHPFRC structure a reinforcement bars are replaced by a scattered reinforcement.Load bearing capacity in bending of the final shell or thin-walled structure might be influenced by many other factors, including fiber distribution, type and orientation, casting position (for example for up-side down casting) of the shell part of the structure and others.Very significant factor should be a cold joint in term of possible time delay between two batches (simulation of breakdown of the mixer, waiting time to air leakage).At the actual paper focus on an experimental program on cold joint between two batches of fresh UHPFRC poured into the thin wall and deck panels with longitudinal rib.These cold joints are caused by time delay between previous and next batch.Time between two batches differs in range of 10-90 minutes.
UHPFRC Thin-walled structure Shell structure Cold joint Bending capacity
David Citek Stanislav Rehacek Petr Tej Jiri Kolisko
Klokner Institute, CTU in Prague, Prague, Czech Republic
国际会议
福州
英文
739-745
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）