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High-fluidity sleeve grouting material for rebar connection and preparation method thereof

A steel connecting sleeve and grouting material technology, which is applied in the field of cement-based grouting, can solve the problems of poor product quality stability, uneven quality, poor quality stability of raw materials, etc., to improve the initial fluidity, improve the use performance, and improve the aging time loss effect

Inactive Publication Date: 2019-04-23
SHANGHAI HENGFU SCI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of sleeve grouting materials on the market, and the quality is uneven. The main problems are poor overall fluidity, insufficient strength, and poor product quality stability of the grouting materials. At the same time, due to the complex formula, poor quality stability of raw materials, production process Immaturity leads to higher production costs, resulting in generally higher market sales prices

Method used

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  • High-fluidity sleeve grouting material for rebar connection and preparation method thereof
  • High-fluidity sleeve grouting material for rebar connection and preparation method thereof
  • High-fluidity sleeve grouting material for rebar connection and preparation method thereof

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Embodiment 1

[0024] The invention provides a grouting material for connecting sleeves with high fluidity. The grouting material is mainly composed of cement, fine aggregate, mineral admixture, expansion agent, water reducing agent, defoaming agent, aromatic oil and externally added Among them, the weight percentage of each component is: 45% cement, 42% fine aggregate, 4% mineral admixture, 0.35% expansion agent, 0.25% water reducer, 0.15% dispersant Foaming agent, 0.25% aromatic oil, 8% additives.

[0025] The mineral admixture is obtained by compounding fly ash, active silica fume and polysilicon powder in a certain proportion, wherein the mass ratio of fly ash, active silica fume and polysilicon powder is (35-45):(20-35):( 15-25).

[0026] The mineral admixture in the present invention is obtained by compounding fly ash, active silica fume, and polysilicon powder in a certain proportion, because the mixing of fly ash is beneficial to reduce the water demand of the cementitious material,...

Embodiment 2

[0031] The invention provides a grouting material for connecting sleeves with high fluidity. The grouting material is mainly composed of cement, fine aggregate, mineral admixture, expansion agent, water reducing agent, defoaming agent, aromatic oil and externally added Among them, the weight percentage of each component is: 50% cement, 38% fine aggregate, 7% mineral admixture, 0.35% expansion agent, 0.25% water reducer, 0.15% dispersant Foaming agent, 0.25% aromatic oil, 5% additives.

[0032] The mineral admixture is obtained by compounding fly ash, active silica fume and polysilicon powder in a certain proportion, wherein the mass ratio of fly ash, active silica fume and polysilicon powder is (35-45):(20-35):( 15-25).

[0033] The mineral admixture in the present invention is obtained by compounding fly ash, active silica fume, and polysilicon powder in a certain proportion, because the mixing of fly ash is beneficial to reduce the water demand of the cementitious material,...

Embodiment 3

[0038] The invention provides a grouting material for connecting sleeves with high fluidity. The grouting material is mainly composed of cement, fine aggregate, mineral admixture, expansion agent, water reducing agent, defoaming agent, aromatic oil and externally added Among them, the weight percentage of each component is: 48% cement, 40% fine aggregate, 6% mineral admixture, 0.35% expansion agent, 0.2% water reducer, 0.2% dispersant Foaming agent, 0.25% aromatic oil, 6% admixture.

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Abstract

The invention provides a high-fluidity sleeve grouting material for rebar connection and a preparation method thereof. The high-fluidity sleeve grouting material for rebar connection is made from, byweight, 45-55% of cement, 35-50% of fine aggregate, 2-15% of mineral mixture, 0.25-0.4% of an expanding agent, 0.1-0.3% of a water reducer, 0.1-0.2% of a defoaming agent, 0.2-0.3% of aromatic hydrocarbon oil and 5-8% of an admixture. The sleeve grouting material for rebar connection prepared herein has high fluidity; the problem is solved that an existing sleeve grouting material for rebar connection has insufficient initial fluidity in actual engineering application or is poorer than regular materials in initial fluidity, and has poor fluidity retaining capacity; with certain fluidity of thegrouting material ensured, the problem of inadaptation to production and construction due to too high fluidity of the grouting material is solved; fluidity of grout is improved, and service performance of the grouting material is improved.

Description

technical field [0001] The invention relates to the technical field of cement-based grouting, in particular to a grouting material for connecting sleeves with high fluidity and a preparation method thereof. Background technique [0002] In recent years, with the gradual expansion of the construction scale of prefabricated buildings, the amount of connection materials used to connect prefabricated components or between prefabricated components and cast-in-place components has shown an increasing trend. At this stage, steel sleeves are mainly used to connect joints. The quality of the grouting material used for the connection joint of the barrel is one of the key factors to ensure the reliability of the structure. At present, there are many kinds of sleeve grouting materials on the market, and the quality is uneven. The main problems are poor overall fluidity, insufficient strength, and poor product quality stability of the grouting materials. At the same time, due to the comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/70C04B2201/50C04B14/06C04B14/068C04B18/08C04B18/146C04B14/04C04B2103/0068C04B2103/302C04B2103/50C04B24/00
Inventor 郭智法郭海军
Owner SHANGHAI HENGFU SCI TECH DEV
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