High-strength no-shrink grouting material and preparation method thereof

Abstract

The invention relates to a high-strength no-shrink grouting material and a preparation method thereof. The high-strength no-shrink grouting material comprises the following raw materials in parts by mass: 80-150 parts of cementing material, 50-120 parts of fine aggregate, 1-5 parts of an expanding agent, 0.1-1 part of a water reducing agent and 0.5-5 parts of synergistic additive. The preparationmethod comprises the following steps of: (S1) accurately weighing raw-material components except the cementing material according to the proportion, and then uniformly mixing in a mixer; (S2) adding the cementing material into a product obtained in the step (S1), continuously stirring for a preset time and obtaining the high-strength no-shrink grouting material. The high-strength no-shrink grouting material provided by the invention is prepared by adopting the high-strength cementing material, a composite additive and special fine aggregate as well as auxiliary substances with high flow state,slight expansion and segregation prevention and the like, an equipment base and a concrete foundation are fully combined, and the stressing condition of the equipment base is fundamentally changed; the use method is simple; the high-strength no-shrink grouting material can be used after addition of a certain amount of water and uniform stirring on a construction site.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength non-shrinkage grouting material and a preparation method thereof. Background technique [0002] Grouting material refers to the material selected to achieve a certain engineering purpose, can exist in liquid form, and can be easily injected into cracks, cracks, pores and other internal spaces of the corresponding medium by hydraulic pressure, air pressure or electrochemical principles, and has the ability to cement and solidify. The general term for a class of engineering materials whose leakage channels of the medium are blocked and whose physical properties and mechanical properties are improved. In recent years, with the development of my country's economy and the construction of a large number of infrastructures, many existing buildings are in urgent need of reinforcement and transformation, whether in appearance or function; large or extra-large eq...

AI Technical Summary

Problems solved by technology

[0003] At present, there are certain deficiencies in the use of conventional grouting materials. In the projects of foundation reinforcement, road repair, secondary injection, post-tensioning prestressed pipeline grouting of highway bridges, grouting materials generally have short operability time, low strength in the later stage, Problems such as large shrinkage, poor material homogeneity, and excessive bleeding rate will affect the safety of the structure