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混凝土在结硬的过程中发生收缩,温度变化时会热胀冷缩,当这两种变形受到约束后,在结构内部就会产生收缩应力和温度应力,这两种应力分别超过混凝土抗拉强度时就会导致混凝土开裂而形成收缩裂缝或温度裂缝。
The concrete shrinks in the process of knot hardening. When the temperature changes, it will expand and shrink. When these two deformations are constrained, shrinkage stress and temperature stress will occur in the interior of the structure. These two stresses respectively exceed the tensile strength of the concrete. It will lead to concrete cracking and shrink cracks or temperature cracks.