Result in the crack of the grouting material early - structure Zhengzhou secondary grouting material

How much grouting material grouting standard high strength grouting material often is large size thin-walled structure appeared in engineering construction, grouting material often occurred early cracking, appeared to its early cracking phenomenon summed up the main reason is as follows: the & # 8195;   1, the hydration heat quantity of gelled material system, early exothermic rate faster, grouting material internal heat.     2, the grouting material inside and outside temperature difference is big, there is a larger temperature shrinkage stress.     3, strength of grouting material water use in high performance grouting material is less, all kinds of reaction are robbing water molecules, little kaifeng grouting material factory, not enough to use, easy to cause surface shrinkage after demoulding, in the early strength is low, easy to cause various forms of cracking. Large size thin-wall grouting material of high performance technology approach can include: 1. Reduce the internal temperature rise of grouting material, 2. Improve tensile strength and ultimate tensile strain of the grouting value, improve the creep properties of grouting material in order to stress have greater relaxation.     4, and properly reduce the early modulus of grouting material and thermal expansion coefficient, thus improving the overall durability of grouting material.     High strength grouting material wall is the emphasis and difficulty in the mix proportion design of grouting materials by studying the anti-pollution mixed shijiazhuang grouting LiaoChang blend of grouting material influence of early shrinkage.     Prepared by the thermal crack of high performance grouting material has the following characteristics: the & # 8195;   1, grouting material with a large amount of mineral admixtures, the mixed they can reduce the hydration temperature rise, and to improve the workability of grouting material and improve the late strength, can the space of gelled material, improve the internal structure of grouting material, participate in the hydration reaction of gelled material, improve the corrosion resistance, and can inhibit the JianJiLiao reaction of grouting material.     2, use of ground slag powder, because the particles are fine, hydration soon, and played a grinding fine slag powder filling and improving the effect of aggregate interface, so the strength of the grouting material in all ages.     Type 3, using micro retarded chemical and beautiful seam an agent, makes the production of grouting material in water drop at the same time to keep good workability, preparation of grouting material structure is more compact, not easy ooze water, has a good durability.