现浇混凝土楼板裂缝的原因及防治新解

New Viewpoint about Causes and managements of Crack on cast-in-place concrete Floor

针对目前较普遍的现浇混凝土楼板裂缝问题,通过调研论证等方式总结出造成目前楼板开裂的主要原因是,预拌混凝土中大量掺加粉煤灰、模板支撑体系刚度及套数不足、板面上荷过早,并针对上述原因制订出了相应的裂缝控制措施。实践证明,所采取的裂缝控制措施具有较强的可行性和有效性。

Crack on cast-in-place concrete floor is currently a common problem to be solved. In this paper, three main causes of crack on cast-in-place concrete floor were summarized ： （ 1 ）powder and coal ash was added to the prepare-mixed concrete; （ 2 ） stiffness and quantity of template support system was not enough;（ 3 ）Burden on the floor was too early. Aiming at the above causes, corresponding control measures were established to manage the crack on cast-in-place concrete floor. These control measures have been proved to be feasible and useful in practice.