If we use polypropylene staple fiber in the construction industry, then the shrinkage of concrete cracks will be a good help, but also to avoid cracks in mortar.
如果我们将聚丙烯短纤维应用在建筑行业当中的话，那么混凝土裂缝的收缩性会得到良好的帮助，而且还可以避免砂浆出现裂缝问题。
So, how to find out the shrinkage reasons of merchandise concrete and control shrinkage cracks still to be solved problem.
如何找出混凝土的收缩机理，从而更好的控制收缩裂缝，是有待解决的问题。
In the east section, the hazards are mainly ground subsidence, ground cracks and expansion and shrinkage of expanded soils.
东区段主要的地质灾害是地面沉降、地裂缝和膨胀土的胀缩灾害。
Although the styles of cracks are multiple, the experimental study and analysis on shrinkage of Concrete Small Hollow Block Wall (CSHBW) are focused in this paper.
小砌块建筑的裂缝型式是多样的，本文侧重于小砌块建筑墙体收缩性能的试验研究、理论分析以及相关的机理研究等。
The problem of cracks, which is caused in structures by deforming effect, such as hydration heat, shrinkage, temperature difference of atmosphere, is very important and complicated.
由于变形作用(水化热、收缩、气温差)引起工程结构的裂缝是很复杂并很重要的问题。
Based on the appraisal and analysis of concrete cracks in a frame structures, this paper describes the regularity and cause about concrete shrinkage cracks.
本文通过对某框架楼混凝土裂缝的鉴定与分析，提出有关混凝土收缩裂缝的规律及相关成因等方面的探讨。
Cracks design of reinforced concrete structure focuses on the cracks caused by temperature and shrinkage stress which is traditionally controlled through "resistance" and "relieving".
钢筋混凝土框架结构的裂缝设计主要是针对温度和收缩应力产生的裂缝，历来有“抗”与“放”两种不同的处理方法。
To improve the impermeability of concrete, and reduce cracks in concrete created by the shrinkage, expansive agent is often added.
为了提高混凝土的抗渗性能，以及减免由于混凝土收缩而产生的裂缝，在混凝土中经常加入膨胀剂。
In order to prevent the cracks that would be likely caused by restricted conditions of the wet-joint, the wet-joint demands using expansive concrete to compensate the shrinkage and creep.
江津观音岩长江大桥为结合梁桥，为防止桥面板湿接缝在约束条件下产生裂缝，该桥面板湿接缝要求采用微膨胀混凝土，以补偿混凝土的收缩、徐变。
The common defects of the housing casting include cracks, sand drop, slag inclusion, shrinkage porosity and rough grain, etc.
机架的常见缺陷有裂纹、掉砂、夹渣、缩孔缩松和晶粒粗大等。
The rate of water evaporation, shrinkage strain and the area of cracks increase with increasing exposure temperature and wind velocity, and with decreasing relative humidity.
混凝土的水蒸发速率、收缩变形、开裂面积都随着环境温度和风速的增加而增大，随着相对湿度的升高而降低；
Then each of four different types of shrinkage cracks 'characteristics has been analyzed, as to different characteristics of shrinkage cracks, the author proposed corresponding control measures.
分别对四种不同的收缩裂缝特性进行具体分析，并针对不同特性的收缩裂缝提出了相应的防治措施。
Thus, research on measures for superfine sand concrete to get rid of plastic shrinkage cracks is of important practical significance.
因此，对特细砂混凝土塑性收缩防裂措施进行研究，具有重要的现实意义。
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。
Obviously, the addition of polypropylene fibers is significant in controlling plastic shrinkage cracks in the early stage and improving ductility for concrete at low fiber volume fraction.
低掺量的聚丙烯纤维掺入混凝土后可显著控制混凝土早期收缩裂缝，提高混凝土的耐久性。
Based on field measurements and experimental analyses of underwater shrinkage cracks, we discuss formation processes of the cracks, sedimentary models of their filling, factors that influence them.
通过野外实地考察测试，对水下收缩裂隙整体形成过程、裂隙内充填物沉积模式、影响因素等进行了详细讨论，并且建立了相应的地质理论模型。
This paper expounds the shrinkage effect and temperature effect of the concrete, and advances some measures for controlling the cracks of the concrete in the construction practice.
阐述了混凝土的收缩作用和温度作用，并提出了在工程实践中进行裂缝控制的措施。
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。
This technique can provide a new method for reduction of the drying shrinkage of concrete and prevention of the cracks of concrete.
该技术为混凝土的减缩防裂提供了新的途径。
Restrained shrinkage of concrete is a main source of cracks in concrete.
自由收缩对混凝土并无不良影响，约束收缩是混凝土开裂的源动力。
Shrinkage small, directional, high incidence of adverse Weld, deformation, warping, shrinkage cracks and stress concentration, resin filler uneven.
收缩小，有方向性，易发生熔接不良，变形、翘曲、缩孔、裂纹及应力集中，树脂填料分布不匀。
The types of those cracks are summarized as three kinds: plastic shrinkage cracking, dry shrinkage cracking and hydration heat cracking.
将引起混凝土裂缝的类型归纳为塑性收缩开裂 ，干燥收缩开裂 ，水化热开裂三种 ，并对其表象及成因进行了阐述。
The humidity would diffuse a large scope as there are cracks in the cement-based composite, resulting in the increase of shrinkage stress which is not benefit for crack control.
当有裂缝存在时，湿度扩散的范围更深、更广，相应的湿度应力则会更大，不利于裂缝的预防与控制。
The humidity would diffuse a large scope as there are cracks in the cement-based composite, resulting in the increase of shrinkage stress which is not benefit for crack control.
当有裂缝存在时，湿度扩散的范围更深、更广，相应的湿度应力则会更大，不利于裂缝的预防与控制。
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