Sleeve grouting material mixed with iron filings and fine sand, its preparation method and supporting strength testing method

Abstract

Sleeve grouting material mixed with iron filings fine sand, its preparation method and supporting strength testing method, this application mixes iron filings fine sand sleeve grouting material, and the sleeve grouting material is measured in parts by weight and includes the following components: cement 100 parts, 50-55 parts of modified mineral powder, 2 parts of iron filings fine sand slurry, 3 parts of water reducer, 3 parts of retarder, 2 parts of defoamer, 1 part of expansion agent, 20-25 parts of water; The invention provides sleeve grouting material mixed with iron filings fine sand, its preparation method and supporting strength detection method. This application uses processed iron filings fine sand to replace the aggregate in the original sleeve grouting material. Therefore, the compactness and strength of the sleeve grouting material are improved; since the iron filings are also equivalent to fibers, the crack resistance of the sleeve grouting material is improved. Therefore, the use of iron filings can greatly improve the strength and crack resistance of the slurry. Since the application is mainly prepared with pig iron filings, the cost is low, and the prepared sleeve grouting material is tested for compressive strength to ensure product reliability.

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 limited by the diameter of the steel bar, the load type and the height of the building, and the scope of application is wider; [0003] The steel sleeve grouting connection technology refers to the grouting sleeve with ribbed steel bars inserted into the concave-convex surface. The special high-strength cement-based grouting material is poured into the gap be...

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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