Grouting material for rock mass cracks of rock caves and preparation method therefor

Abstract

The invention relates to a grouting material for rock mass cracks of rock caves and a preparation method therefor. The method comprises the steps: a. mixing hydraulic-activity oyster dust, silica sandand metakaolin which are in the mass ratio of 4: 5: 1; b. adding an expanding agent AEA, of which the weight accounts for 5% of total mass, into the mixture, and carrying out uniform stirring in a stirrer; and c. stirring the mixed powder for 20 minutes for later use by a water-cement ratio of 0.37. According to the grouting material, slurry of a reinforcement material has an initial setting timeof about 275min and a final setting time of about 9 hours, the set shrinking percentage of the slurry is lower than 0.08%, the average porosity is 43.95%, the compressive strength in 50 days is not lower than 24MPa, the folding strength is not lower than 5.5MPa, and the compressive strength of 18 freeze-thaw cycles is 25.94MPa. More choices are provided for solving the problem of crack grouting of cave temples.

Description

technical field [0001] The invention belongs to the field of material technology, and mainly relates to a grouting material used for cracks in grotto rock mass and a preparation method thereof. Background technique [0002] The Grotto Temple is a very important category of cultural heritage in my country. In the caves of the Grotto Temple, a large number of exquisite murals, statues, statues and other cultural relics are preserved. These murals, statues, and statue relics have very important historical value, scientific value and artistic value. value. However, under the action of natural environmental factors such as wind erosion and rain erosion for a long time, the rock mass of many grottoes has been severely weathered, resulting in a large number of crack diseases. The further development of the fissures in the grottoes will cut the rock mass to form many massive dangerous rocks. Once an earthquake occurs, even a small one, it will cause the surrounding rock mass of the ...

AI Technical Summary

Problems solved by technology

PS-C and PS-F (PS-potassium silicate with high modulus, C-clay, F-fly ash) are suitable and commonly used grouting materials for geotechnical cultural relics. The shrinkage has not been reduced to the ideal state, because the shrinkage is an important indicator of the grouting material, which will affect the grouting effect and project quality

[0004] The Chinese invention patent with the patent number ZL 2014 1 128504 1 discloses a hydraulic oyster ash for repairing and protecting stone cultural relics. This invention patent is to solve the problem that the existing reinforcement materials cannot meet the repairing and strengthening of masonry cultural relics.

The Chinese invention patent with the application number 2015100420939 discloses a reinforcement material for grouting grouting cracks in sandstone caves. The purpose of expansion agent AEA is to provide a kind of grouting that satisfies the crack grouting of sandstone cave rock mass. The shrinkage of the stone body of this grouting material is significantly lower than that of PS-C and PS-F grouting materials, but it has not yet decreased. to ideal value

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