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。
In order to prevent the crack of concrete, many mass concrete takes dry shrinkage as an important index of crack resistance.
为了防止混凝土发生裂缝，许多大体积混凝土在设计中提出抗裂要求，干缩是混凝土抗裂能力的重要指标。
The shrinkage of LWAC is increased than that of Normal Concrete (NC), which will bring about the crack of LWAC more easily.
轻集料混凝土的收缩变形比普通混凝土大，易使混凝土形成裂缝。
Mixture proportions, flowability, crack propagation at early ages, strength, shrinkage, carbonation and the freezing and thawing resistance of flowing concrete with high flowability were investigated.
研究了具有高流动性的流态混凝土的配比、流动性、早期裂纹扩展、强度、收缩、碳化和抗冻融性，这种混凝土无论在成本上还是性能上都是非常可行的。
The creep and shrinkage of concrete is the major problem that leads to the enlargement of crack width in concrete structures, under the action of long-term load.
混凝土的徐变和收缩是长期荷载作用下混凝土结构裂缝宽度扩大的主要影响因素。
It has been proved that shrinkage can't be used as the indicator of crack resistance of concrete and the evaluation experiments should be carried out under restrained conditions.
自由收缩值不能直接用于评价混凝土的抗裂性能，试验必须在约束条件下进行。
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。
Marly crack and deterioration of many bridge deck overlays have been attributed to the traffic load, nature factor and high thermal or shrinkage stress development in the concrete.
混凝土桥面铺装在交通荷载、自然因素、温度与收缩应力综合作用下，普遍出现了早期开裂与破坏。
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。
The concrete face slab uses the anti crack technology of compensation shrinkage concrete.
混凝土面板采用补偿收缩混凝土防裂技术；
Increasing autogenous volume expansive deformation for compensating thermal shrinkage deformation of concrete may improve crack resistance.
提高混凝土的自生体积膨胀变形量补偿混凝土的温度收缩变形，对于混凝土抗裂很有意义。
The designer can set post-pouring belt, using UEA con- crete and designing pre-stressing concrete structure to avoid the crack caused by temperature and shrinkage.
超长混凝土结构的设计和施工中可以采取设置后浇带、采用微膨胀——补偿收缩混凝土或设计无粘结预应力混凝士结构来防止温度收缩裂缝的产生。
Autogenous-shrinkage will cause the concrete early crack, which will seriously affect the concrete strength and durability.
自收缩会造成混凝土的早期收缩开裂，严重影响混凝土结构的强度和耐久性。
Restraining the shrinkage and crack of concrete by using of expansive agent has been an effective controlling method since the setting of shrinkage-compensating theory.
自补偿收缩理论建立以来，采用混凝土膨胀剂抑制混凝土的收缩开裂是行之有效的控制方法。
It had been proved that the free shrinkage can't be used to evaluate crack resistance of concrete directly and the evaluation experiments should be carried out under restrained circumstance.
自由收缩值不能直接用于评价水泥基材料的抗裂性能，试验必须在约束条件下进行。
It had been proved that the free shrinkage can't be used to evaluate crack resistance of concrete directly and the evaluation experiments should be carried out under restrained circumstance.
自由收缩值不能直接用于评价水泥基材料的抗裂性能，试验必须在约束条件下进行。
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