Machine-made sand light-expansion high early strength grouting material and preparation method thereof

A technology of machine-made sand and grouting materials, applied in the field of machine-made sand grouting materials, which can solve the problems of high sand price, unfavorable natural environment protection, and difficult control of production costs, and achieve high early strength, good economic and social benefits, and low cost Effect

Inactive Publication Date: 2013-07-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional grouting materials mostly use quartz sand, river sand and yellow sand as fine aggregates. At present, the price of such sand is relatively high, and the unlimited exploitation of natural resources such as river sand is not conducive to the protection of the natural environment, and the production cost is difficult to control.

Method used

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  • Machine-made sand light-expansion high early strength grouting material and preparation method thereof
  • Machine-made sand light-expansion high early strength grouting material and preparation method thereof

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Embodiment 1

[0024] Embodiment one : A kind of machine-made sand micro-expansion high-early-strength grouting material and its preparation method

[0025] (1) Composition of raw materials: It is composed of the following raw materials in weight percentage, 45% of machine-made sand, 50% of ordinary Portland cement, 2% of expansion and shrinkage components, and 3% of reinforcement components. Among them, the expansion and shrinkage component is compounded by high alumina cement and anhydrite at a weight ratio of 0.5:1, and the reinforcing component is compounded by polycarboxylate superplasticizer dry powder and silica fume at a weight ratio of 0.05:1.

[0026] Raw material requirements:

[0027] Manufactured sand: MB value <1.4, stone powder content less than 5.0%, mud content less than 1.0%, moisture content less than 3%;

[0028] Ordinary Portland cement: the strength grade is 42.5, and the Blaine specific surface area is 350-400m 2 / Kg;

[0029] High alumina cement: the strength gra...

Embodiment 2

[0038] Embodiment two : the same place as embodiment one is no longer described, and the difference is:

[0039] Raw material composition: machine-made sand 50%, ordinary portland cement 45%, expansion and shrinkage component 3%, reinforcement component 2%. The weight ratio of high alumina cement to anhydrite in the expansion and shrinkage component is 1:1; the weight ratio of polycarboxylate superplasticizer dry powder to silica fume in the reinforcement component is 0.1:1.

[0040] Preparation method: the primary dry mixing time is 15 minutes, and the secondary dry mixing time is 15 minutes.

Embodiment 3

[0041] Embodiment three : the same place as embodiment one is no longer described, and the difference is:

[0042] Raw material composition: 55% machine-made sand, 40% ordinary Portland cement, 2% expansion and shrinkage components, and 3% reinforcement components. The weight ratio of the expansion and shrinkage component high alumina cement to anhydrite is 1.5:1; the weight ratio of the reinforcing component polycarboxylate superplasticizer dry powder to silica fume is 0.15:1.

[0043] Preparation method: the primary dry mixing time is 10 minutes, and the secondary dry mixing time is 20 minutes.

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Abstract

The invention relates to a machine-made sand light-expansion high early strength grouting material and a preparation method thereof. The grouting material comprises the following ingredients: 40-55 wt% of machine-made sand, 40-55 wt% of ordinary portland cement, 1-5 wt% of expansion and shrinkage-reducing components, and 1-5 wt% of reinforcing component, wherein, the expansion and shrinkage-reducing component comprises high-alumina cement and anhydrite according to the weight ratio of 0.5 to 1.5 : 1, and the reinforcing component comprises polycarboxylic acid water reducer powder and siliceous dust according to the weight ratio of 0.05 to 0.15 : 1. The grouting material is prepared by carrying out two stage dry mix on the ingredients. According to the invention, the problem of difficult use of machine-made sand with large amount in the grouting material production is solved; the product has the advantages of high early strength, light expansion, no shrinkage and the like; and the preparation method has the advantages of simple process, low cost, and no secondary pollution. The invention can be widely applied for anchoring foundation bolt, embedding steel bar secondary grouting of device, reinforcing the beams, plates, columns and floors of buildings and the like, having a wide application range.

Description

technical field [0001] The invention relates to a machine-made sand grouting material, in particular to a machine-made sand micro-expansion high-early-strength grouting material and a preparation method thereof. Background technique [0002] At present, grouting materials with high early strength and no shrinkage have been widely used in mechanical equipment installation and reinforcement repair projects at home and abroad. In terms of the application of grouting material, it has been developed from the traditional secondary grouting for mechanical equipment installation to the reinforcement and repairing of concrete structures, and has achieved good results. [0003] High-strength non-shrink grouting material is a new type of grouting material. According to different cementitious materials, it can be divided into cement-based grouting material, resin-based grouting material and composite grouting material. Among them, cement-based grouting material is the most widely used a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B111/70
Inventor 罗忠涛杨久俊张磊吴洁肖宇领
Owner ZHENGZHOU UNIV
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