The polypropylene fiber can effectively control the length, width and number of the drying shrinkage crack of early-age concrete.
聚丙烯纤维可有效控制混凝土早期干缩裂缝的长度、宽度和数量。
Porous concrete will shrink, so it is necessary to deal with its shrinkage character firstly when studying the problems of joint location and reflection crack of porous concrete base.
由于多孔混凝土存在收缩现象，为研究多孔混凝土基层路面的接缝设置及反射裂缝问题，必须首先研究多孔混凝土的收缩特性。
Temperature and shrinkage crack of huge concrete can destruct concrete structure, so it is important to control the crack.
大体积混凝土结构的温度与收缩裂缝对混凝土结构具有破坏作用，控制裂缝的产生，十分重要。
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