A kind of sleeve grouting material for steel bar connection and preparation method thereof

Abstract

A sleeve grouting material for steel bar connection, which is prepared by mixing 100 parts by weight of dry powder with 13 to 14 parts by weight of water on site from the dry powder of sleeve grouting material for steel bar connection. The dry powder is a mixture composed of the following components and raw materials, The content of each component in the mixture is calculated in parts by weight: 1350-1450 parts of compound cement mixed with ordinary Portland cement and sulphoaluminate cement; 250-550 parts of quartz powder, 350-500 parts of silica powder , 150-250 parts of micro-silica fume, 50-100 parts of light calcium carbonate, 50-150 parts of composite expansion agent, 20-25 parts of polycarboxylate water reducer, 2.15-2.30 parts of modifier; the modified Agents include: 0.15-0.2 parts of polyether modified silicon defoamer, 0.8-1.0 parts of sodium gluconate, 0.4-0.5 parts of zinc oxide, 0.6-0.8 parts of lithium carbonate; the performance of the grout is stable and reliable, and its production method is simple and scientific .

Description

technical field [0001] The invention relates to the field of building materials, and mainly relates to a sleeve grouting material used for connecting steel bars in assembled concrete members and a preparation method thereof. Background technique [0002] The patent application technology with the publication number CN101921086A discloses a cement-based ultra-high-strength non-shrinkage grouting material. This grouting material has high fluidity and compressive strength and is suitable for large-scale equipment installation and anchor bolt anchoring. Contains steel fibers and cannot be used for sleeve pumping grouting; [0003] The patent application technology with the publication number CN102992722A discloses a super-high-strength iron tailings sand cement-based grouting material and its preparation method. Its compressive strength can reach 110 MPa, but the grouting material uses iron tailings sand as the aggregate, and the maximum particle size reaches 4.75 mm, it is nec...

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of sleeve grouting material and preparation method thereof with high gripping strength, high fluidity, high early strength, super high strength, micro-expansion, anti-pressure bleeding, anti-segregation and other properties for steel bar connection. Solve the deficiencies in the sleeve grouting material used for steel bar connection after solving the prior art

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