Cement base CGM high-strength non-shrinkage grouting material secondary grouting of poor maintenance problems

Cement-based CGM high-strength non-shrinkage grouting material secondary grouting curing concrete protection, cement base CGM high-strength shorten grouting material, cement products protection. After secondary pouring of cement-based grout material assumes that the improper protection, often appear the following problems: 1, the cement base CGM high-strength lack of 2, shorten the filling material strength CGM high-strength concrete without shorten the strength of grouting material gelled material hydration, and hydration of gelled material has a close relationship with the environment. As long as the appropriate temperature and humidity environment, gelled material talent better hydration, the strength of the concrete grouting material talent to get better. Hypothesis cannot protect, extremely well in low temperature environment, gelled material hydration speed significantly slows down, making the strength of the concrete grouting material spread slowly, in a dry environment, concrete grouting guess many lost moisture, make the moisture of gelled material does not meet to carry on the hydration reaction, will also affect the strength of the concrete grouting material. Therefore, when the protection is not good, although the manufacture of high strength concrete grouting materials, but the practice of concrete grouting material strength is low, he may also request can not meet the plan. 3, attack crack by environmental impact, concrete grouting material deformation will attack. When the deformation of concrete grouting material was restricted, will constitute the internal stress in the concrete grouting guess. Due to the elastic modulus of concrete grouting material materials, tiny deformation may constitute appropriate internal stress. But, concrete grouting material tensile function is lower. When concrete grouting material in tensile case, concrete grouting material damage very brief, constitute cracks. In the natural environment, the deformation of concrete grouting material performance is often shortened, and shorten the deformation of concrete grouting material is concrete grouting material under tensile, therefore, short cracks. New casting CGM high-strength no shorten grouting material has the following several characteristics: 1, the low strength concrete grouting material right after pouring a period of time, due to the structure just form, the structure is very safe, very short. Therefore, new pouring concrete grouting material strength is very low. This means that the concrete grouting material against all kinds of stress can be very weak. 2, very big humidity just pouring concrete grouting material, can thoroughly in a situation that is full of water, and the environment constitute the larger humidity difference. And due to the low of hydration degree of gelled material, chemical combined water and less glue, coagulation and capillary water more. New pouring concrete grouting material, therefore, very short water loss, and in the same environment under the condition of water loss is bigger, bigger brief attacks of. 3, unsafe temperature new pouring concrete grouting material, in the period of gelled material many hydration of hydration reaction of gelled material is an exothermic reaction, many of the hydration heat release will be accompanied by many, therefore may cause the temperature of the concrete grouting material is bigger change. New pouring concrete grouting these characteristics led to the concrete grouting material briefly deformation and internal stress, and briefly craze, protection is to create a better environment air, reduce the environment and the present situation of concrete grouting material interval, forward concrete grouting material against various deformation ability, to minimize the deformation of concrete grouting material, reduce internal stress, prevent cracking of concrete grouting material. On the other hand, without a very good protection, concrete grouting material is briefly craze. This is another sign of that attack by improper protection, also is the most common dream. 4, table flour on the one hand, the hydration of gelled material need water, on the other hand, the new pouring concrete grouting materials and environmental humidity larger difference between the guess the moisture of the concrete grouting brief transpiration and lost to the environment. Therefore, in the new pouring concrete grouting material exist within a period of time after environmental and gelled material on the water from the plunder. In this kind of plunder, assuming that the environment of the advantages of concrete grouting guess a lot of water lost to the environment, gelled material does not meet the water of hydration, the surface of the concrete grouting material is showed similar to the water loss of clay hardening, instead of hydration hardening