Concrete based on the natural environment of early age cracking sensitivity test

Concrete cracking of cement-based materials has been a hot research field, especially for non-load in recent years due to early cracking of particular concern. This paper describes the simulation of the natural environment during construction, the use of flat crack planes, the air in different time periods were pouring concrete slab cracking, observed and recorded later analysis and evaluation of concrete cracking sensitivity of the issue, the results show that: ordinary concrete cracking mix better performance than the ratio of concrete pumping, water conservation was slightly better than the Nature Conservancy, covering the best conservation; plastic stage of the concrete surface pressure change is only the second rub the continuity of the crack, can not resist the final cracking, big slump degree requirements after concrete pouring strictly control the location of cracks should be covered by conservation.