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Preparation method of concrete grouting agent

A grouting agent and concrete technology, which is applied in the field of concrete admixtures, can solve the problems of product performance defects, complex preparation process and high dosage, and achieve the effects of low equipment requirements, simple process steps and strong operability.

Inactive Publication Date: 2017-03-22
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most of the grouting agents on the market have complex preparation processes, high dosage and high cost, and most of the product performance has certain defects.

Method used

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  • Preparation method of concrete grouting agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Preparation of water reducing agent: 0.1kg ferrous sulfate is dissolved in an appropriate amount of water to obtain an aqueous solution of ferrous sulfate; 0.8kg dicumyl peroxide is dissolved in an appropriate amount of benzene to obtain a benzene solution of dicumyl peroxide; 250kg of acrylamide, 480kg of sodium acrylate, and 240kg of poly(β-aminopropionic acid) were mixed and dissolved in water, and 20kg of isopropanol was added. After stirring evenly, nitrogen gas was introduced for at least 30 minutes, and ferrous sulfate aqueous solution and diisoperoxide were added. The benzene solution of propylene benzene reacts in a water bath at 12°C for at least 20 hours to obtain the finished water reducer;

[0018] (2) Mixing: After weighing each component according to the weight ratio of 80kg fly ash, 50kg silica fume, 10kg water reducer, 1kg expansion agent, and 0.5kg retarder, the fly ash, silica fume, expansion After mixing the agent and retarder, grind evenly, dry ...

Embodiment 2

[0020] (1) Preparation of water reducing agent: 0.15kg ferrous sulfate is dissolved in an appropriate amount of water to obtain an aqueous solution of ferrous sulfate; 1 kg of dicumyl peroxide is dissolved in an appropriate amount of benzene to obtain a benzene solution of dicumyl peroxide; 260 kg Mix acrylamide, 500kg sodium acrylate, and 250kg poly(β-aminopropionic acid) and dissolve in water, add 30kg of isopropanol, stir well, pass nitrogen gas for at least 30min, add ferrous sulfate aqueous solution and diisopropyl peroxide The benzene solution of benzene is reacted in a water bath at 15°C for at least 20 hours to obtain the finished water reducer;

[0021] (2) Mixing: After weighing each component according to the weight ratio of 90kg fly ash, 60kg silica fume, 15kg water reducer, 1.5kg expansion agent, and 1kg retarder, the fly ash, silica fume, expansion After mixing the agent and retarder, grind evenly, dry to constant weight, add water reducer and mix evenly to get c...

Embodiment 3

[0023] (1) Preparation of water reducer: 0.12kg ferrous sulfate is dissolved in an appropriate amount of water to obtain an aqueous solution of ferrous sulfate; 0.9kg dicumyl peroxide is dissolved in an appropriate amount of benzene to obtain a benzene solution of dicumyl peroxide; 255kg of acrylamide, 490kg of sodium acrylate, and 245kg of poly(β-aminopropionic acid) were mixed and dissolved in water, and 25kg of isopropanol was added. After stirring evenly, nitrogen gas was introduced for at least 30 minutes, and ferrous sulfate aqueous solution and diisoperoxide were added. The benzene solution of propylene benzene reacts in a water bath at 13°C for at least 20 hours to obtain the finished water reducer;

[0024] (2) Mixing: After weighing each component according to the weight ratio of 85kg fly ash, 55kg silica fume, 12kg water reducer, 1.2kg expansion agent, and 0.7kg retarder, the fly ash, silica fume, The expansion agent and retarder are mixed and ground evenly. After d...

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Abstract

The invention discloses a preparation method of a concrete grouting agent. The preparation method comprises following steps: 1, a water reducing agent is prepared; 2, mixing, wherein by weight, 80 to 90 part of fly ash, 50 to 60 parts of silica fume, 10 to 15 parts of the water reducing agent, 1 to 1.5 parts of an expanding agent, and 0.5 to 1 part of a retarder are weighed, fly ash, silica fume, the expanding agent, and the retarder are mixed, are grinded to be uniform, and are dried until weight is constant, and the water reducing agent is added for uniform mixing so as to obtain the concrete grouting agent. The preparation method is simple; operability is high; equipment requirement is low; the prepared concrete grouting agent is capable of providing grouting with low water-binder ratio, high fluidity, zero exudation, and minimum inflation, and improving quality, reliability, and durability post-tensioned prestressing duct grouting greatly.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a method for preparing a concrete grouting agent. Background technique [0002] The grouting agent is a mixture made of dry mixing of various materials such as high-efficiency water reducer, micro-expansion agent, and mineral admixture. It is a grouting material used for filling post-tensioned prestressed pipelines after being uniformly mixed with cement and water in a certain proportion at the construction site. It can effectively prevent the corrosion of prestressed steel, ensure the effective stress transmission between the prestressed beam and the concrete structure, make the slurry in the tunnel full and dense, maintain a certain pH value of the slurry, completely wrap the prestressed steel, and the slurry will be hardened. Higher strength, modulus of elasticity and adhesion, and expansion without shrinkage. [0003] Most of the grouting agents currently on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C08F220/06C08F220/56
CPCC04B40/0039C04B24/26C04B2103/302C08F220/06C04B18/08C04B18/146C04B2103/22C04B22/04C04B22/124C04B22/142C04B24/20C08F220/56
Inventor 李涛黄柱陈正寿段玮玮
Owner ZHEJIANG OCEAN UNIV
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