HOW TO BUILD CRACK-FREE DURABLE CONCRETE STRUCTURES- CONCRETE HARDENING TECHNOLOGY INCLUDING MODELLING OF SHRINKAGE, CREEP AND TEMPERATURE OF YOUNG CONCRETE AND ITS INFLUENCE ON DURABILITY AND LIFETIME
Control of thermal and shrinkage cracking in hardening concrete is of great importance to ensure desired service life and function of concrete infrastructures. Making reliable stress estimations, and thereby conclusions about cracking risks caused by temperature movements and shrinkage involves advanced modelling of material properties and structural restraint. The paper presents the main outline of a model for description of material properties needed. Special focus is given to a creep model denoted LLM (Linear Logarithmic Model), which is shown to be robust, easy to use, and capable to extrapolate short-term test into long-term effects. Applications of the presented model using the computer program ConTeSt Pro demonstrates that it can be used to decide what measures to be taken to minimize the risk of cracking during the hardening phase for concrete structures.
Hardening concrete cracking risk creep model hardening control
Jan-Erik Jonasson Mats Emborg Lennart Elfgren Kjell Wallin
Division of Structural Engineering,Lulea University of Technology,971 87 Lulea Sweden Projektengagemang AB,Box 47146,100 74 Stockholm,Sweden
国际会议
长沙
英文
45-50
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）