Cement base CGM grout material secondary grouting of poor maintenance problems

Cement grouting material secondary grouting concrete curing, cement grouting material curing, curing cement base products. After secondary pouring of cement-based grout material if not properly maintained, often appear the following problems: 1, the strength of cement grouting material in less than 2, the strength of the concrete grouting material development gelled material hydration of the results, the hydration of gelled material have a close relationship with the environment. Only in the appropriate temperature and humidity environment, gelled material to better hydration, the strength of the concrete grouting material to get a better development. If you can't very well maintained and in low temperature environment, gelled material hydration speed significantly slows, a slower development of the strength of the concrete grouting material, in a dry environment, concrete grouting material moisture lost in great quantities, make gelled material there is not enough water for hydration reaction, will also affect the strength of the concrete grouting material development. When maintenance is not good, therefore, despite the high strength concrete grouting material, but the actual strength of the concrete grouting material may also lower, can not meet the design requirements. 3, cracks under the influence of environment, concrete grouting material deformation will occur. When the deformation of concrete grouting material is restricted, will form the internal stress in the concrete grouting material. Due to the elastic modulus of concrete grouting material materials, tiny deformation could form a considerable internal stress. However, tensile performance of concrete grouting material is lower. When the concrete grouting material is in a state of tension, concrete grouting material is easy to damage and crack formation. In the natural environment, shrinkage deformation of concrete grouting material often performance, and the shrinkage deformation of concrete grouting material is concrete grouting material is in a state of tension, so prone to fracture. New pouring concrete grouting material has the following characteristics: 1, the low strength concrete grouting material in quite some time after pouring, because of its newly formed structure, the structure is unstable, it is easy to damage. Therefore, new pouring concrete grouting material strength is very low. This means that the concrete grouting material very weak ability to resist a variety of stress. 2, very big humidity just pouring concrete grouting material, almost entirely in a saturated state, formed a larger humidity difference to the environment. 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, it is easy to dehydrate, and in the same environment conditions water loss is bigger, easy to generate a large shrinkage. 3, unstable temperature new pouring concrete grouting material, in the period of gelling material of hydration of hydration reaction of gelled material is an exothermic reaction, a lot of hydration will be accompanied by a lot of heat release, and therefore may lead to the temperature change of the concrete grouting material is larger. New pouring concrete grouting material caused the concrete grouting material for the features of easy deformation and internal stress, and easy to crack, the maintenance is to create a good atmosphere, reduce the environment and the present situation of concrete grouting material gap, improve the ability of concrete grouting material of resisting deformation, to minimize the deformation of concrete grouting material, reduce internal stress, prevent cracking of concrete grouting material. On the other hand, without a good maintenance, concrete grouting material is easy to crack. This is another kind of phenomenon produced by improper maintenance, is also one of the most common imagination. 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 led to the moisture in concrete grouting material easy evaporation and loss to the environment. Therefore, in the new pouring concrete grouting material exist within a period of time after environment and cementing materials by competition for water. In this battle, if the environment has the upper hand, a lot of water in concrete grouting material loss to the environment, gelled material is not enough water to carry on the hydration, the surface of the concrete grouting material is showed similar to the water loss of clay hardening, instead of hydration hardening