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

A technology for machine-made sand and grouting material, applied in the field of machine-made sand grouting material, can solve the problems of difficult control of production cost, unfavorable natural environment protection, high sand price, and achieve good economic and social benefits, high early strength, no secondary Effects of Environmental Pollution

Inactive Publication Date: 2012-02-15
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

Examples

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Embodiment 1

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

[0025] (1) Raw material composition: It is composed of the following raw materials in weight percentage, 45% machine-made sand, 50% ordinary Portland cement, 2% expansion-reduction component, and 3% reinforcement component. The expansion-reduction 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 water-reducing agent dry powder and silica fume at a weight ratio of 0.05:1.

[0026] Raw material requirements:

[0027] Machine-made 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: Strength grade is 42.5, Blaine's specific surface area is 350-400m 2 / Kg;

[0029] High alumina cement: strength grade is 42.5, alumina content is above 50%;

[0030] Anhydrite: CaSO 4 The c...

Embodiment 2

[0038] Example two : The same points as in the first embodiment will not be described, the difference is:

[0039] Raw material composition: machine-made sand 50%, ordinary Portland cement 45%, expansion-reduction component 3%, reinforcement component 2%. Among them, the weight ratio of high alumina cement and anhydrite in the expansion and shrinkage component is 1:1; the weight ratio of the dry polycarboxylate water-reducing agent powder and silica fume in the reinforcing component is 0.1:1.

[0040] Preparation method: first level dry mixing time 15min, second level dry mixing time 15min.

Embodiment 3

[0041] Example three : The same points as in the first embodiment will not be described, the difference is:

[0042] Raw material composition: machine-made sand 55%, ordinary Portland cement 40%, expansion-reduction component 2%, reinforcement component 3%. 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 water-reducing agent dry powder to silica fume is 0.15:1.

[0043] Preparation method: first level dry mixing time 10min, second level dry mixing time 20min.

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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 Applications(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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