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Low-viscosity flow-second grouting material capable of being used in a nuclear power industry

A low-viscosity, grouting material technology, applied in the field of cement-based grouting materials, can solve the problems of not meeting the test requirements of the flow cone method and high viscosity, and achieve the effects of preventing early and late shrinkage cracks, good fluidity, and ensuring homogeneity

Active Publication Date: 2014-02-05
GAOBEIDIAN CITY DAAO NEW TYPE BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that ordinary cement-based grouting material has a high viscosity after being stirred and cannot meet the test requirements of the flow cone method. Grouting material, when the fluidity of this low-viscosity grouting material is measured by the flow cone method, the flow second is 18-30s, which can meet the requirements of equipment manufacturers and design units for the flow performance of grouting materials, and other indicators can meet GB / T50448- Requirements of 2008 "Technical Specifications for Application of Cement-based Grouting Materials"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Ordinary silicon 42.5 cement: 100 parts

[0019] Silica fume: 5 parts

[0020] 0.5-2mm river sand: 100 parts

[0021] Composite expansion agent: 8 parts (70% of ettringite expansion agent, 30% of light-burned magnesium oxide)

[0022] Water reducer: 0.3 parts

[0023] Composite anti-sedimentation agent: 1.0 parts (fumed silica 5%, superfine kaolin 95%.)

[0024] When using, add 18% water of the mass of the grouting material for stirring, and use the funnel specified in ASTM C939 to conduct the flow second test. The initial flow second is 27s. At the same time, the grouting material does not bleed or settle, and other indicators can meet GB / T50448 -2008 "Technical Specifications for Application of Cement-based Grouting Materials".

Embodiment 2

[0026] Ordinary silicon 42.5 cement: 100 parts

[0027] Silica fume: 8 parts

[0028] 0.5-2mm river sand: 90 parts

[0029] Composite expansion agent: 8 parts (70% of ettringite expansion agent, 30% of light-burned magnesium oxide)

[0030] Water reducing agent: 0.5 parts

[0031] Composite anti-sedimentation agent: 2.0 parts (fumed silica 10%, superfine kaolin 90%.)

[0032] When using, add 20% of the mass of the grouting material for stirring, and use the funnel specified in ASTM C939 to conduct the flow second test. The initial flow second is 25s. At the same time, the grouting material does not bleed or settle, and other indicators can meet GB / T50448 -2008 "Technical Specifications for Application of Cement-based Grouting Materials".

Embodiment 3

[0034] Ordinary silicon 42.5 cement: 100 parts

[0035] Silica fume: 10 parts

[0036] 0.5-2mm river sand: 110 parts

[0037] Composite expansion agent: 8 parts (60% of ettringite expansion agent, 40% of light-burned magnesium oxide)

[0038] Water reducing agent: 0.5 parts

[0039] Composite anti-sedimentation agent: 1.2 parts (fumed silica 10%, superfine kaolin 90%.)

[0040] When using, add 20% of the mass of the grouting material for stirring, and use the funnel specified in ASTM C939 to conduct the flow second test. The initial flow second is 19s. At the same time, the grouting material does not bleed or settle, and other indicators can meet GB / T50448 -2008 "Technical Specifications for Application of Cement-based Grouting Materials".

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Abstract

The invention aims at the problem that a common cementitious grout has high viscosity after stirred and cannot satisfy a test requirement by a flow cone method, and is intended to prepare a low-viscosity cement-based grouting material without settlement or water segregation when water consumption is high. When the fluidity of the low-viscosity grouting material is measured, the flow second is 18-30s, so as to satisfy of the requirement of equipment manufacturers and design companies on the flowing property of the grouting material. In addition, a composite expanding agent is used to compensate the contraction of the cement-based grouting material, thereby avoiding later-stage contraction cracks of the cementitious grout.

Description

technical field [0001] The invention relates to a cement-based grouting material, which has a very low viscosity and can be used for grouting equipment foundations in nuclear power and other industries that require high fluidity of materials. Background technique [0002] Cement-based grouting materials are mainly used for secondary grouting of equipment foundations and anchoring of anchor bolts. They have been widely used in my country since the 1990s. At present, two standards have been promulgated, namely GB / T50448-2008 "Cement-based Technical Specifications for the Application of Grouting Materials" and JC / T986-2005 "Cement-based Grouting Materials". Place the truncated cone mold with 100mm, upper inner diameter 70mm, and height 60mm on a horizontal glass plate, then pour the stirred grout into the truncated cone mold, lift the truncated cone mold after filling, and wait for the grouting material Measure the flow diameter of the grout after stopping the flow on the glass p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06
Inventor 王涛
Owner GAOBEIDIAN CITY DAAO NEW TYPE BUILDING MATERIAL
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