High-strength micro-expansion prestress anchoring grouting material and preparation method thereof

A grouting material and micro-expansion technology, which is used in the preparation of high-strength micro-expansion prestressed anchor grouting materials, and the field of high-strength micro-expansion prestressed anchor grouting materials, can solve problems such as hidden dangers in engineering, uncontrollable grouting quality, and national and people's property losses. , to achieve the effect of improving fluidity, avoiding segregation and stratification, and improving volume stability

Inactive Publication Date: 2011-09-14
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of test consumes a lot of manpower, material resources and financial resources. What is more serious is that due to the lack of professional grouting t

Method used

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  • High-strength micro-expansion prestress anchoring grouting material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A high-strength micro-expansion prestressed anchor grouting material is composed of a gelling component, a fine aggregate component, an expansion component, an active admixture, an anti-cracking component, a water-reducing component and an adjusting component in a certain weight ratio A uniform powder material mixed and ground together, a high-strength micro-expansion prestressed anchor grouting material, which is made of the following raw materials in weight percentage:

[0061] Raw material % by weight Raw material % by weight

[0062] Gelling component 38% Fine aggregate component 50%

[0063] Intumescent component 5% Active admixture 5%

[0064] Water reducing component 0.9% Anti-cracking component 0.7%

[0065] Adjustment component 0.4%.

[0066] The gelling component is ordinary Portland cement.

[0067] The fine aggregate component is natural quartz sand, which is formed by mixing quartz sand with a particle size range of 20-40 mesh and 40-70 mesh at a ratio ...

Embodiment 2

[0080] A high-strength micro-expansion prestressed anchor grouting material is composed of a gelling component, a fine aggregate component, an expansion component, an active admixture, an anti-cracking component, a water-reducing component and an adjusting component in a certain weight ratio A uniform powder material mixed and ground together, a high-strength micro-expansion prestressed anchor grouting material, which is made of the following raw materials in weight percentage:

[0081] Raw material % by weight Raw material % by weight

[0082] Gel component 40% Fine aggregate component 48%

[0083] Intumescent component 4% Active admixture 6%

[0084] Water reducing component 1.2% Anti-cracking component 0.5%

[0085] Adjustment component 0.3%.

[0086] The gelling component is ordinary Portland cement.

[0087] The fine aggregate component is natural quartz sand, which is formed by mixing quartz sand with a particle size range of 20-40 mesh and 40-70 mesh at a ratio of 1...

Embodiment 3

[0097] A high-strength micro-expansion prestressed anchor grouting material is composed of a gelling component, a fine aggregate component, an expansion component, an active admixture, an anti-cracking component, a water-reducing component and an adjusting component in a certain weight ratio A uniform powder material mixed and ground together, a high-strength micro-expansion prestressed anchor grouting material, which is made of the following raw materials in weight percentage:

[0098] Raw material % by weight Raw material % by weight

[0099] Gel component 37% Fine aggregate component 51%

[0100] Intumescent component 5% Active admixture 5%

[0101] Water reducing component 1.2% Anti-cracking component 0.6%

[0102] Adjustment component 0.2%.

[0103] The gelling component is ordinary Portland cement.

[0104]The fine aggregate component is natural quartz sand, which is formed by mixing quartz sand with a particle size range of 20-40 mesh and 40-70 mesh at a ratio of 1:...

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Abstract

The invention discloses a high-strength micro-expansion prestress anchoring grouting material and a preparation method thereof. The material is prepared from a gelatinization component, a fine aggregate component, an expansion component, an active doped material, a water reducing component, a crack resistant component and a regulation component in a certain weight proportion. The preparation method specifically comprises the following steps: A, adding the gelatinization component, the expansion component, the active doped material, the crack resistant component and the water reducing component in a ball-mill in a designed mass ratio for commonly mixing and grinding, so as to obtain a even powder material; B, at room temperature and normal pressure, grinding until the Blaine specific surface of the material is not less than 350m<2>/kg; and C, evenly mixing and stirring the obtained in the step B with quartz sand prepared in a proportion at the room temperature and the normal pressure so as to obtain the grouting material. The method is practicable and is convenient for operation; the grouting material has high early strength and micro-expansion, thereby effectively compensating the hydration shrinkage of a cement-based material, obviously improving the adhesive strength of an anchor rod and a periphery base, effectively protecting the anchor rod from being corroded and prolonging the service of the anchor rod.

Description

technical field [0001] The invention belongs to the technical field of building materials for geotechnical engineering, and more specifically relates to a high-strength micro-expansion prestressed anchor grouting material, and also relates to a preparation method of a high-strength micro-expansion prestressed anchor grouting material. This material is mainly used in slope prestressed anchoring and reinforcement projects as a grouting material to improve the anchoring force of the anchoring section and stabilize the anchoring point. Background technique [0002] Prestressed anchorage technology is a new two-point prestressed structure developed on the basis of prestressed technology and the principle of wedge anchor. For the broken rock mass or faulted rock mass in the high slope, the purpose of stabilizing the slope is achieved by drilling holes in the rock mass and applying prestress to the anchor rods or anchor cables anchored in the holes. Now it is being popularized in ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04Y02W30/91C04B14/06C04B16/0633C04B18/141C04B20/0052C04B20/0096C04B20/026C04B22/008C04B24/226C04B24/383C04B40/0028C04B2103/22C04B7/323C04B24/2641C04B2103/58C04B2103/302
Inventor 汤华吴振君王水林袁从华
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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