Mineral polymer grouting material and method for strengthening grotto surrounding rock fractures by using same

Abstract

The invention provides a mineral polymer grouting material and a method for strengthening grotto surrounding rock fractures by using the same. The mineral polymer grouting material comprises the following components in parts by weight: 20-40 parts of grounded slag, 30-40 parts of metakaolin, 1-3 parts of quartz powder, 1-3 parts of calcite powder, 1-5 parts of kaolinite and 1-35 parts of alkali activator, wherein the free water content of each material is not higher than 3%. The formula of the grouting material is stirred uniformly according to the corresponding standard of a cement-based grouting material. After the method provided by the invention is implemented, the grotto surrounding rock fractures and crushed rocks are effectively strengthened, and the performance of the strengthening material is approximate to the physical and mechanical state of the strengthened rock. The strengthening material has a good bonding effect with decayed rocks, low viscosity and good groutability, can be solidified at room temperature, releases little heat during reaction, and meets the requirements of weather resistance, freeze-thaw resistance, acid-base resistance and the like. The color of the material after strengthening is as same as that of the cultural relic, the construction is convenient and the price is proper. A positive and effective effect of plugging the grotto crag fractures is achieved.

Description

technical field [0001] The invention relates to the technical fields of construction engineering and cultural relics protection engineering, in particular to a mineral polymer grouting material and a method for reinforcing fissures in surrounding rocks of grottoes. Background technique [0002] Grouting is the use of grouting pressure or the grout's own weight to press the grout into the rock, sand and gravel layer, concrete or soil cracks, joints or cavities through drilling holes to improve the hydrogeological and engineering geological conditions of the foundation and the integrity of the building. engineering measures. [0003] The "grotto" is a cave dug artificially on the cliff of the hillside, and it is an important material material for studying history. For thousands of years, in addition to man-made damage, the grottoes have also been eroded by natural forces. In some grottoes, weathering fissures, unloading fissures and bedding fissures of the rock mass itself a...

AI Technical Summary

Problems solved by technology

However, as grouting materials for cultural relics protection, the following problems may also occur: (1) Because polymer materials contain carbon in different degrees, they may become the target of heterotrophic microorganisms to absorb carbon sources

Especially under the action of air pollutants, light, heat and water, etc., the polymer will age, the crack grouting material will lose its protective function, and it will leave negative effects on the original crack surface, such as discoloration, pulverization and clogging micro hole etc.

(3) The grotto rock mass is an inorganic material, and the organic polymer protective material is quite different from the inorganic material in structure and performance, resulting in interface peeling

The existing cement-based inorganic grouting materials are relatively brittle, so the ability to coordinate deformation with the rock mass interface is reduced, and may also cause problems such as drying shrinkage and cracking

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