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1·Therefore, it is important to study the shrinkage reasons of the new wallbord materials and control its shrinkage crack.

因此，找出非烧结新型墙材收缩规律、控制收缩裂缝，具有重要的实际意义。

2·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。

3·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。

4·The paper states that the plastic cracks after shaped the pumping concreting divides into plastic settlement crack and plastic shrinkage crack.

开裂应力测定装置测试了水泥砂浆、混凝土塑性抗拉强度和塑性收缩开裂应力。

5·But almost all the attention of the plastic shrinkage crack are focus on the medium and coarse sand concrete and the study of super fine one not found.

目前关于塑性收缩裂缝的研究几乎都集中在中粗砂混凝土，对于特细砂混凝土塑性收缩裂缝及其相关问题的研究几乎没有。

6·The quantity and the thickness of commodity concrete is more than normal concrete, which tends to occur shrinkage crack in structure when transporting or pumping.

商品砼为满足运输或泵送的流动性要求，一般水泥用量较多，砼的稠度较大，容易引起收缩裂缝的出现。

7·Unbound aggregate base can efficiently retard the reflexion of cracks to asphalt pavement surface, which is aroused by the shrinkage crack of semi-rigid base in the inverted structure.

半刚性基层沥青路面作为过渡层时，可以有效改善半刚性基层收缩裂缝的反射裂缝的发生。

8·According to the causes of crack occurrence and the weather characteristics in the project area, it is key to prevent the cracks such as the plastic crack, dry crack and cold shrinkage crack.

根据混凝土面板产生裂缝的原因，并结合工程区的气候特点，认为控制面板的塑性收缩、干缩与冷缩裂缝是防止裂缝产生的重点。

9·Is mainly the size effect and solidification, shrinkage, stress and other issues clearly, to avoid or reduce the segregation, iron manhole cover deformation and crack defects.

主要是明显的尺寸效应和凝固、收缩、应力等问题，避免或减少铸铁井盖的成分偏析、变形、开裂等缺陷的产生。

10·When the tension in the top (created by shrinkage) has built up, it eventually releases - and it releases in the form of a crack.

由于收缩造成的面板张力不断累积，导致裂纹。