混凝土的塑性收缩裂缝是在混凝土凝结硬化期间或在凝结硬化后不久出现在混凝土表面的一种裂缝,最常见于混凝土地面板、路面等。通常互相平行,间隔约为0.3～1米,深2.5～5.0厘米,很少与板的周围相交叉。这类裂缝对混凝土的强度一般 Plastic shrinkage cracking of concrete is a type of crack that occurs on the surface of concrete during the setting hardening of concrete or shortly after setting hardening, most commonly on concrete floor slabs, pavements, etc. Usually parallel to each other, the interval is about 0.3 to 1 meter, and the depth is 2.5 to 5.0 centimeters. It rarely crosses the surroundings of the plate. The strength of such cracks in concrete is generally