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Sleeve grouting material for steel bar connection and preparation method and application thereof

A sleeve grouting and steel bar technology, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of not mentioning the use technology and results of grouting materials, affecting the quality of the project, and insufficient fluidity, so as to reduce the Bleeding and separation, excellent comprehensive performance and low cost

Pending Publication Date: 2021-01-05
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the sleeve grouting material that exists in the prior art still has weak point
For example, the existing sleeve grouting materials have many components, are expensive, and are complicated to use
And depending on the ambient temperature, grouting materials often need to be used in low temperature or even negative temperature environments. The current grouting materials often do not mention the use technology and results of grouting materials at low temperature and negative temperature
In addition, the currently used cement-based grouting materials also have problems such as insufficient fluidity, poor crack resistance, and insufficient strength, and are prone to shrinkage, which affects the quality of the project

Method used

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  • Sleeve grouting material for steel bar connection and preparation method and application thereof
  • Sleeve grouting material for steel bar connection and preparation method and application thereof
  • Sleeve grouting material for steel bar connection and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] See Table 1 for the raw material composition of the sleeve grouting material for steel bar connection in this embodiment.

[0060] Prepared by:

[0061] A. Add the A component into the plastic sand mixer, start the mixer, and select the low speed gear of the plastic sand mixer for low speed mixing;

[0062] B. Add the B component, add while stirring, and then stir at a low speed for 4 minutes;

[0063] C. Stop stirring, let stand for 1min, that is.

[0064] Construction by the following methods:

[0065] Using grouting method, including the following steps:

[0066] A. Test the grouting environment temperature;

[0067] B. After the prefabricated components are installed in place, take temporary fixing measures to ensure the stability of the components;

[0068] C. Wet the grouting work surface, grouting pump, grouting bucket, grouting pipe, agitator blade, and mixing bucket with water;

[0069] D. Add the accurately weighed component A to the plastic sand mixer, ...

Embodiment 2-5

[0075] See Table 1 for the raw material composition of the sleeve grouting material for steel bar connection in Examples 2-5. Examples 2-5 were obtained according to the same preparation method and construction process as in Example 1.

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PUM

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Abstract

The invention provides a sleeve grouting material for steel bar connection and a preparation method and application thereof.The sleeve grouting material is composed of a component A and a component B.The component A is dry powder and comprises, by mass, 400-600 parts of cement, 10-40 parts of mineral admixture, 400-600 parts of sand, 0.2-3.0 parts of plastic expanding agent, 15-25 parts of expanding agent, 1-3 parts of water reducing agent, 0.2-1.0 part of defoaming agent, 0.1-1.0 part of stabilizer, 0-10 parts of antifreezing agent, 0-5 parts of an early strength agent, and 0-5 parts of a retarder; and the component B is water and comprises, in parts by mass, 120-170 parts of water. The sleeve grouting material has the characteristics of high fluidity, micro-expansion, high strength andthe like, and can be suitable for construction at different temperatures (-5 to 10 DEG C) and normal temperature (higher than 10 DEG C).

Description

technical field [0001] The invention relates to the technical field of building materials, in particular, the invention relates to a high-fluidity, micro-expansion, high-strength sleeve grouting material and its preparation method and application. Background technique [0002] The prefabricated building method improves performance through factory prefabrication and maintenance, and can greatly reduce wet work on the construction site. It is not only environmentally friendly but also reduces on-site material waste to a certain extent. The horizontal connection of the prefabricated building is realized by the on-site connection method of the reserved horizontal reinforcement of the components, while the vertical connection is realized as follows: the ribbed steel bar is inserted into the high-strength iron sleeve embedded in the concrete, and the high-performance The grouting material fills the gap between the sleeve and the steel bar. After the grouting material is hardened, ...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B28/04E04G21/02C04B111/70C04B111/34C04B111/27
CPCE04G21/02C04B28/06C04B28/04C04B2111/70C04B2111/343C04B2111/27C04B18/141C04B18/146C04B14/06C04B2103/302C04B24/42C04B24/383C04B2103/0068C04B22/142C04B22/10C04B22/148C04B22/085C04B22/0013C04B22/002C04B7/02C04B18/08
Inventor 贾恒琼王涛祝和权杜存山李海燕魏曌吴韶亮杜玮伊钟毓
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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