The cause of grouting material early cracking - structure Grouting material manufacturer to tell you

grouting material causes of cracking grouting material and grouting material manufacturers often is large size thin-walled structure appeared in engineering construction, grouting materials xiangtan grouting materials where there are often occurs early cracking, appeared to its early cracking phenomenon summed up the main reason is as follows: 1, the hydration heat quantity of gelled material system, the early exothermic rate faster, grouting material internal heat. Henan pedestal grouting material manufacturer 2, the grouting material inside and outside temperature difference is big, there is a larger temperature shrinkage stress. 3, high-performance grouting guess water consumption is less, all sorts of reaction are in the competition for water molecules, seem to be too little, not enough to use, easy to cause appearance after demoulding drying shrinkage, early strength is low, easy to cause various forms of cracking. Large volume thin wall grouting material of high performance skills approach can include: 1. Decline in grouting material, the internal temperature of 2. Progress of grouting material tensile strength and ultimate tensile strain values, the creep properties of grouting material progress to stress have larger lax. 4, appropriate fall in the early period of the grouting material modulus and thermal expansion coefficient, and the overall advance grouting material durability. High strength grouting material wall is the key points and difficulties of grouting material proportioning design after discussion anti-pollution admixture effect on grouting material early to shorten. Low thermal crack is produced in high performance grouting material has the following characteristics: 1, the grouting guess with a lot of mineral admixtures, to reduce their incorporation of hydration temperature rise, and to improve the workability of grouting material and improve the late strength, also can fill the gelling material space, improve the internal structure of grouting materials, attend the hydration reaction of gelled material, progressive corrosion resistance, and can contain grouting guess JianJiLiao response. 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. Emulsified epoxy resin grouting material type 3, using micro retarded chemical and beautiful seam an agent, which resulted in the reduction of grouting material in water together and to adhere to the excellent workability, manufacturing of grouting material structure is more compact, not easy ooze water, has a good durability.