混凝土路面开裂的主因有:收缩开裂,包括冷缩和干缩;动荷载(车辆荷载)作用下的疲劳破坏而开裂。其中疲劳破坏除车辆荷载作用外,也与板体内收缩拉应力有关,因此,要防止开裂,关键在于降低混凝土拉应力。混凝土内部的收缩拉应力主要取决于混凝土的收缩和外部限制条件。 The main causes of cracking of concrete pavement include shrinkage and cracking, including shrinkage and shrinkage, and cracking under the action of dynamic load (vehicle load). In addition to the fatigue failure of the vehicle load, but also with the contraction of the board body tensile stress, therefore, to prevent cracking, the key is to reduce the tensile stress of concrete. Shrinkage tension within concrete depends mainly on the shrinkage of concrete and external constraints.