A cement-based high-strength non-dispersible grouting material

Abstract

The invention provides a cement-based high-strength non-dispersible grouting material, which comprises the following ingredients in parts by weight: 300-400 parts of Portland cement, 60-80 parts of superfine Portland cement, and 40-60 parts of calcium sulfoaluminate Cementing material, 45-55 parts of ultra-fine fly ash, 450-550 parts of quartz sand, 3.0-4.0 parts of water reducing agent, 6.0-8.0 parts of flocculant and 160-175 parts of water; ~10 mesh, 10 mesh to 20 mesh, 20 mesh to 40 mesh, 40 mesh to 70 mesh and 70 mesh to 140 mesh quartz sand; the flocculant is a composite flocculant mainly composed of polysaccharide and biological glue, so The mass fraction of the polysaccharide is 10%-20%, and the mass fraction of the biogum is 5%-15%. The cement-based high-strength non-dispersible grouting material system has simple structure, low water-material ratio, high water-land strength ratio, strong water impact resistance, and high underwater compressive strength.

Description

technical field [0001] The invention belongs to the technical field of cement-based materials, in particular to a cement-based high-strength non-dispersible grouting material. Background technique [0002] Cement-based grouting materials are generally a powdery material that is pre-mixed in a factory by cement components, expansion components, aggregate components, water-reducing and water-retaining components, and micro-modified components in an appropriate proportion. When used, add water and stir , that is, it becomes a non-shrink grout with self-leveling property. Its commonly used strength is generally 35MPa~80MPa, and the commonly used water-material ratio is generally 0.13~0.17. In recent years, due to the demand of wind power projects, ultra-high-strength cement-based grouting materials of 80MPa-120MPa have been developed one after another, and the minimum water-material ratio has dropped to 0.07-0.08. Cement-based grouting materials can be used for steel structure...

AI Technical Summary

Problems solved by technology

Its disadvantages are as follows: first, the water-material ratio increases significantly due to the increase of the viscosity of the grouting material system, which makes the underwater compressive strength of the grouting material hardened lower; The surface grout is easy to lose, which causes the incompleteness of the surface structure and the reduction of strength; the third is that the large fluidity of the grouting material causes the reduction of anti-dispersion, resulting in a relatively low water and land strength.

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