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    影响济南自流平混凝土收缩的主要因素
    来源:http://www.jndmzp.com   时间:2013-8-17 14:06:14
        1、含水量影响。混凝土在水中会呈现一种膨胀的状态,所以当其表面的含水量较高时会导致表面早期的收缩较大。
          water content influence. Concrete will show a swelling in water, so when the surface of the high water content will cause the surface early shrinkage.
        2、济南自流平活性影响。颗粒越细则代表水泥的活性越高,接触的表面积增加了,收缩就会变大。一般来说我们选择水泥都是按其构件厚度来选,例如,矿渣水泥收缩比普通水泥收缩大,我们则选后者。
          Ji'nan self leveling activity. The rules of cement particles representing higher activity, the contact surface area is increased, the contraction will be bigger. In general we choose cement is according to the thickness of the member to the election, for example, slag cement shrinkage than ordinary cement shrinkage, we choose the latter.
        3、集料济南自流平 http://www.jndmzp.com/因素影响。骨料的选择、颗粒粒径、含泥量等都是影响混凝土收缩的重要因素。例如,选择砂岩做骨料,收缩幅度会增加;粗细骨料中含泥量越大收缩越大; 骨料粒径越小,砂率越高,收缩越大; 配筋率越大,收缩越小,但配筋率过大则会增加混凝土的拉应力; 外加剂及掺合料选择不当,严重增加收缩。
          effect of aggregate Ji'nan self leveling factors. Aggregate selection, particle size, clay content are important factors affecting shrinkage of concrete. For example, select sandstone as aggregate, contraction amplitude increases; aggregate mud content in more shrinkage is bigger; the smaller the particle size of aggregate, sand ratio is higher, the greater the shrinkage; with the reinforcement ratio, shrinkage is small, but the reinforcement ratio is too large will increase the concrete tensile stress; admixture and admixture improper selection, serious increase contraction.

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