Of Xingtai grouting material - grouting material strength in the three cases, the contrast 
 A more production grouting material specimen by adding coarse aggregate not improve the cube compressive strength of the grouting material 
 The main factors affecting the compressive strength of the grouting material strength of cement, water-cement ratio, temperature, aggregate variety and quality. Grouting compound aggregate of the application for the formation of the skeleton, to reduce the amount of cement, shrinkage, and lower heat of hydration. Because of its intensity differences, the different varieties of coarse aggregate will grouting materials, the Xingtai grouting material preparation intensity; varieties of the same quality of aggregate, the amount of long time strength declined, because the structure formation process of grouting material must be generated within layered and the outer layer; outside the hierarchical sink makes the coarse aggregate, water and grout float, resulting in uneven within the grouting material; within the hierarchical formation of a variety of water floating in the bottom of the coarse aggregate and cement paste binding site hole cavity, resulting in weak positions to reduce the grouting material, the overall strength of the Xingtai grouting material, the more the amount of coarse aggregate, the greater the impact. In this regard, the researchers conducted a large number of comparison tests, mixing the matter with the grouting material mixture sieve to the coarse aggregate mortar specimens made of the same size with different intensity levels grouting material, detected in a standard curing conditions 28d compressive strength, the results show that the greater the difference of the strength of mortar and grout material strength. Therefore, in the production of specimens of the grouting material, and more by adding coarse aggregate, would not improve the compressive strength of the grouting material. 
 2, the cube strength of the grouting material than in the same line with the summer compared with other seasons 
 Natural curing conditions, grout, Xingtai summer grout compressive strength is not higher than in winter. Hydration rate of cement within a certain range is accelerated with the increase in temperature of the hydration, but this does not explain the higher than at normal temperatures, the formation of strength relative to their peers of conditions the strength of its formation. When the temperature increases on the one hand due to the speed of hydration of cement, unhydrated cement particles surrounded by quickly hydration products impede the formation of the ultimate strength of the cement. Especially the high summer temperatures, the water evaporates too quickly, if conservation is not to strengthen the cement dust due to lack of water affect the conduct of the hydration reaction, therefore, under the same conditions with the ratio of summer Nature Conservancy grouting material, Xingtai grouting material The intensity is not necessarily higher than other seasons, the Nature Conservancy of grouting material strength. 
 3, the aggregate fast content than the same quality content cement grouting material strength 
 Mud to the formation of the weak parts in the grouting compound, reducing the effective area of ??the structure of the grouting material and grouting material strength is significant, in the aggregate content in the mixing process uniformly distributed, the clay content in certain within, not only will not affect the strength of the grout but the isolation of the cement particles makes more uniform cement hydration complete and improve the grouting materials, the Xingtai grouting material strength. This specification aggregate mud content and mud content limit has also been confirmed. 
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