Scrap iron-doped fine sand sleeve grouting material and preparation method and matched strength detection method thereof

Abstract

The invention discloses a scrap iron-doped fine sand sleeve grouting material and a preparation method and a matched strength detection method thereof, and the scrap iron-doped fine sand sleeve grouting material comprises the following components in parts by weight: 100 parts of cement, 50-55 parts of modified mineral powder, 2 parts of scrap iron fine sand slurry, 3 parts of a water reducing agent, 3 parts of a retarder, 2 parts of a defoaming agent, 1 part of an expanding agent and 20-25 parts of water; According to the invention, aggregate in an original sleeve grouting material is replacedwith the processed scrap iron fine sand, and due to the irregularity of scrap iron, the compactness and strength of the sleeve grouting material are improved; the scrap iron is also equivalent to fibers, so that the crack resistance of the sleeve grouting material is improved. Therefore, the use of scrap iron can greatly improve the intensity of slurry and the crack resistance. The sleeve grouting material is mainly prepared from raw scrap iron, so that the cost is low, and the product reliability of the prepared sleeve grouting material is guaranteed through compressive strength detection.

Description

Technical field [0001] The invention relates to the field of sleeves for connecting steel bars. In particular, it relates to a sleeve grouting material mixed with iron filings and fine sand, a preparation method thereof, and a matching strength detection method. Background technique [0002] At present, my country is actively promoting the industrialization of construction and vigorously promoting prefabricated buildings. At present, prefabricated buildings often use steel bar sleeve connection. Compared with traditional steel bar welding and mechanical connection, the steel bar sleeve grouting connection method is not restricted by the diameter of the steel bar, the load category and the height of the house, and the scope of application is wider; [0003] Rebar sleeve grouting connection technology means that ribbed steel bars are inserted into a grouting sleeve with a concave-convex surface. The gap between the sleeve and the steel bar is poured with special high-strength cement...

AI Technical Summary

Problems solved by technology

[0004] Cement, modified mineral powder and aggregate are the main components of the traditional sleeve grouting material for steel bar connection. At present, the commonly used aggregate is fine sand. Because the fine sand itself is not strong enough, the sleeve grouting material for steel bar connection after use Often weak;

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