水泥混凝土早期抗裂性能的研究现状

Review of Study on Cement Concrete Cracking Resistance at Early Ages

针对目前混凝土材料研究领域的热点问题———开裂,对国内外水泥混凝土抗裂性能的研究现状进行了总结和评述.由于混凝土凝结硬化的早期是影响并控制混凝土抗裂性和后期性能的关键阶段,因此重点介绍了早期混凝土收缩、强度、弹性模量、徐变等的动态发展过程及这一过程对混凝土开裂趋势和抗裂性能的影响等方面的研究情况.

Focusing on the hot issue in the field of concrete material research at present - cracking, the national and international research work of cement concrete cracking resistance are summarized and analyzed in this paper. Because early ages of concrete setting and hardening are critical stages of concrete influencing and even controlling cracking resistance and other performances of concrete at later ages, emphases are put on those research situations about the shrinkage and cracking of concrete at early ages, the dynamic evolutions of shrinkage, strength, elastic modulus and creep, as well as their effects on concrete cracking sensitivity and cracking resistance. Conclusion can be made that there have been prominent progresses in this issue, but is still in need of further research work.