Inorganic grouting material for repairing semirigid base layer crack and preparation method thereof

Abstract

The invention discloses an inorganic grouting material for repairing a semirigid base layer crack and a preparation method thereof, and belongs to the field of road repair. The inorganic grouting material is characterized by being prepared from the following ingredients of water-based epoxy latex, Portland cement, ore powder, expansion agents, NaOH, polycarboxylate superplasticizers, hydroxymethylcellulose, long chain alkylolamides and water according to the preparation method with the steps of S1, adding weighed ore powder, Portland cement, hydroxymethyl cellulose and expansion agents into astirring pot to be stirred; S2, mixing the weighed water-based epoxy latex, long chain alkylolamides, polycarboxylate superplasticizers, NaOH and water; performing stirring; S3, adding materials obtained in S2 into the materials obtained in S1; performing stirring to obtain an inorganic grouting material. The designed inorganic grouting material has high flowability, seepage performance and excellent mechanical performance; the semi-rigid base layer crack can be repaired; the traffic can be fast developed; the influence of pavement construction on the public traveling is reduced.

Description

technical field [0001] The invention relates to the field of road repair, in particular to an inorganic grouting material for repairing cracks in a semi-rigid base and a preparation method thereof. Background technique [0002] The most commonly used cement grouting material is ordinary Portland cement. Its advantages are: wide source of raw materials, low cost, non-toxic, and simple construction process. The disadvantages are: the stability of cement slurry is poor, it is easy to precipitate water, the setting time is long, and because of the large diameter of cement particles, the ability to inject into micro pores is often limited. Under the condition of large flow rate of groundwater, cement slurry is easily diluted and washed by water and difficult to consolidate, and has poor resistance to water dispersion and water solubility. In order to improve the properties of cement slurry, various admixtures are often mixed into the cement slurry, such as expansion agent, wate...

AI Technical Summary

Problems solved by technology

The disadvantages are: the stability of cement slurry is poor, it is easy to precipitate water, the setting time is long, and due to the large diameter of cement particles, the injection capacity of micro pores is often limited

[0003] Although cement grouting materials are widely used in practical projects, from the perspective of application effects, cement grouting materials have the following problems: due to the large particle size of cement particles, the fluidity and permeability of the grout cannot meet the requirements for crack repair; Slurry materials generally have relatively large water and ash, and later water evaporation and cement hydration lead to volume shrinkage of the cement paste, which affects the effect of grouting repairs. Although adding an expansion agent can improve the shrinkage of the cement paste, at present the expansion agent can only affect the cement slurry. The early shrinkage of the body has been improved, but the improvement effect on the later shrinkage is not obvious; the setting and hardening time of the cement paste is difficult to meet the requirements of rapid open traffic, and the addition of early strength agents and quick setting agents has adverse effects on the later strength of cement grouting materials

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