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如何预防构件出现裂缝?
来源:http://www.hot-web-dir.com 关键词:GRC构件 发布时间:2018-08-29 阅读:165

构件本身的质量合格的前提下,构件的接缝处始终是薄弱环节,裂缝容易在这里产生。单纯用“粘牢”的办法来防止裂缝产生较困难,即使在构件的接缝处贴上玻纤布增强也很难解决。构件一定会收缩,靠硬拉难以拉。峁辜鸦蚴枪辜炜,因为并没有解决收缩变形与拉伸变形的平衡问题。更何况构件安装时需上下、前后反复错动才能对齐,难以做到砂浆饱满,多数是安装后再补塞砂浆,故不容易保证粘牢。
On the premise that the quality of the component itself is qualified, the joint of the component is always a weak link, where cracks are easy to occur. It is difficult to prevent cracks by simply "sticking" the cracks, and it is difficult to solve the problem even if glass fiber cloth is applied to the joints of components. Components must shrink, hard tension is difficult to pull, the result is often cracking or cracking, because it does not solve the balance between shrinkage deformation and tensile deformation. Moreover, when the components are installed, they need to move up and down repeatedly before and after alignment, it is difficult to achieve full mortar, mostly after installation and then fill the mortar, so it is not easy to ensure a firm bond.
采用弹性砂浆增加拉伸变形值的方法,单就防止构件缝开裂而言,思路和方法都是正确的。但实践起来却有一个矛盾难以解决,即弹性砂浆的高弹性与构件饰面材料的低弹性之间的矛盾。构件饰面材料(如腻子)的拉伸率却远没有弹性砂浆这么大,构件表面仍然会开裂。若为此而要求饰面材料也达到同样高的拉促率,成本上不现实。
It is correct to adopt elastic mortar to increase the tensile deformation value to prevent the cracking of component joints. However, in practice, there is a contradiction that is difficult to solve, that is, the contradiction between the high elasticity of elastic mortar and the low elasticity of decorative materials of components. The tensile strength of the decorative material (such as putty) is far less than that of the elastic mortar, and the surface of the component will still crack. If the requirement for finishing materials is also up to the same high pull rate, the cost is unrealistic.
基于以上分析,目前要想做到GRC轻质构件不开裂,确实很困难。即使GRC轻质构件不开裂,单构件的饰面材料(如腻子)的变形率没有GRC打,墙表面仍然开裂,这一点在普罗旺斯的外墙表现较明显。有些开裂其实只是饰面材料的开裂。由于墙表面系浅色涂料的关系,因此一点开裂马上表现出来。
Based on the above analysis, it is very difficult for GRC lightweight components to crack at present. Even if the GRC lightweight component does not crack, the deformation rate of the single component decorative material (such as putty) is not GRC hit, the wall surface still cracks, which is more obvious in Provence's exterior wall. Some cracks are actually cracking of decorative materials. Because the surface of the wall is related to the light color coating, a little cracking will appear immediately.
从满足使用功能和安全性两方面考虑,GRC轻质构件的接缝处有0.5mm以内可以接受,既不影响安全,也不影响隔音,但影响外观。给用户产生的心理效应不好。如果能够做到虽然构件里面有细小裂缝,但表面没有,这个主意问题就解决了。因此,由原来花大力气试图阻止GRC构件不出现开裂,改为重点解决构件表面裂缝。
Considering the service function and safety, the joints of GRC lightweight components are acceptable within 0.5mm, which does not affect the safety or sound insulation, but affects the appearance. The psychological effects on users are not good. If you can do that although there are small cracks in the component, but not on the surface, the problem of the idea is solved. Therefore, instead of trying hard to prevent the GRC members from cracking, we should focus on solving the surface cracks.
基于以上思路,我们可以采用一种防裂胶带以防止构件表面开裂。由于开裂胶带有很好的弹性,它的另一个特点是能自动跟踪变形,当裂缝变小或者消失时,防裂胶带自动回弹。
Based on the above ideas, we can adopt a crack prevention adhesive tape to prevent the surface cracking of the components. Because the cracking tape has good elasticity, another feature of the tape is that it can automatically track deformation, when cracks become small or disappear, the anti-cracking tape automatically rebounds.
 
 

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