混凝土在硬化过程中,由于水分蒸发,体积逐渐缩小,产生收缩,而现浇混凝土板的四周由于受支座约束,不能自由伸展。当混凝土收缩引起板的约束应力超过一定程度时,必然引起现浇板开裂。造成混凝土楼板裂缝的原因是多方面的,也是不可避免的,而且部分由于施工、养护和材料等原因造成的一些无规律的、不太严重的裂缝也是无害的,但是广大用户很难从专业上去 Concrete in the hardening process, due to the evaporation of water, the volume gradually reduced, resulting in shrinkage, and cast-in-place concrete panels surrounded by the restraint, not free to stretch. When the concrete contraction caused by restraint stress exceeds a certain level, will inevitably lead to in-situ cracking board. The causes of concrete floor cracks are manifold and inevitable, and some irregular and less severe cracks caused by construction, maintenance and materials are harmless, but it is difficult for the majority of users Go up