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High-temperature type sleeve grouting material for connection of steel bars and preparation method of high-temperature type sleeve grouting material

A sleeve grouting and warm-type technology, which is applied in the field of building materials, can solve problems such as unsatisfactory grouting effects, achieve the effects of prolonging the working time, ensuring the density of grouting, and reducing construction costs

Active Publication Date: 2019-12-06
武汉合创炬盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art, the present invention provides a high-temperature sleeve grouting material for steel bar connection and its preparation method, which solves the problem that the sleeve grouting material for steel bar connection needs to take cooling measures when it is used in a high temperature environment and the grouting effect is not good. ideal question

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  • High-temperature type sleeve grouting material for connection of steel bars and preparation method of high-temperature type sleeve grouting material

Examples

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Effect test

Embodiment 1

[0025] A method for preparing sleeve grout for high-temperature steel bar connection, comprising the following steps:

[0026] Step 1: Weigh 0.5% of stabilizer, 0.25% of organic coating agent, 0.25% of temperature regulator and 0.35% of functional admixture by weight percentage, and mix them;

[0027] Among them, the stabilizer is at least one of bentonite, zeolite powder, and metakaolin, and the specific surface area of ​​the stabilizer is ≥350m 2 / kg;

[0028] The organic coating agent is composed of 15% cellulose ether, 15% citric acid, 8% biopolysaccharide gum and 62% calcium stearate by weight percentage; the cellulose ether is selected from 400 viscosity hydroxypropyl methyl cellulose ether , the biopolysaccharide gum is at least one of Brunei gum, xanthan gum, and diyout gum;

[0029] The temperature regulator consists of 3% sodium nitrate and / or calcium nitrate, 6% polyalcohol ethoxylate, 11% multi-sheet graphene dissolved in 80% absolute ethanol by weight percentage...

Embodiment 2

[0037] A method for preparing sleeve grout for high-temperature steel bar connection, comprising the following steps:

[0038] Step 1: Weigh 1.5% of stabilizer, 0.45% of organic coating agent, 1.05% of temperature regulator and 0.45% of functional admixture by weight percentage, and mix them;

[0039] Among them, the stabilizer is at least one of bentonite, zeolite powder, and metakaolin, and the specific surface area of ​​the stabilizer is ≥350m 2 / kg;

[0040] The organic coating agent is composed of 25% cellulose ether, 18% citric acid, 4.5% biopolysaccharide gum and 52.5% calcium stearate by weight percentage; the cellulose ether is selected from 400 viscosity hydroxypropyl methyl cellulose ether , the biopolysaccharide gum is at least one of Brunei gum, xanthan gum, and diyout gum;

[0041] The temperature regulator is composed of 2.5% sodium nitrate and / or calcium nitrate, 7.5% polyol ethoxylate, 10% multi-sheet graphene dissolved in 80% absolute ethanol by weight perc...

Embodiment 3

[0049] A method for preparing sleeve grout for high-temperature steel bar connection, comprising the following steps:

[0050] Step 1: Weigh 4% of stabilizer, 0.75% of organic coating agent, 1.25% of temperature regulator and 0.65% of functional admixture by weight percentage, and mix them;

[0051] Among them, the stabilizer is at least one of bentonite, zeolite powder, and metakaolin, and the specific surface area of ​​the stabilizer is ≥350m 2 / kg;

[0052] The organic coating agent is composed of 27% cellulose ether, 25% citric acid, 3% biopolysaccharide gum and 45% calcium stearate by weight percentage; the cellulose ether is selected from 400 viscosity hydroxypropyl methyl cellulose ether , the biopolysaccharide gum is at least one of Brunei gum, xanthan gum, and diyout gum;

[0053] The temperature regulator consists of 4% sodium nitrate and / or calcium nitrate, 8.5% polyol ethoxylate, 7.5% multi-sheet graphene dissolved in 80% absolute ethanol by weight, and ultrasoni...

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Abstract

The invention relates to the technical field of building materials, and discloses a high-temperature type sleeve grouting material for connection of steel bars. The high-temperature type sleeve grouting material for connection of steel bars comprises, in percent by weight, 45-57% of a cementitious material, 36-52% of aggregate, 0.5-5% of a stabilizer, 0.25-0.75% of an organic coating agent, 0.25-1.25% of a temperature regulator and 0.35-0.65% of a functional admixture. The preparation method of the high-temperature type sleeve grouting material for connection of steel bars includes the following steps: (1) weighing the stabilizer, the organic coating agent, the temperature regulator and the functional admixture, and performing even mixing; (2) weigh the cementitious material, adding the mixture under stirring, and performing mixing; (3) adding the aggregate under stirring, and performing mixing; and (4) weighing the high-temperature type sleeve grouting material for connection of steelbars for mixing with water, adding the high-temperature type steel bar-connecting sleeve grouting material to the water under stirring, performing even mixing so as to obtain the finished product. The problems are solved that when a sleeve grouting material for connection of steel bars is used in a high temperature environment, cooling is needed, and the grouting effect is not ideal.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a sleeve grouting material for connecting high-temperature steel bars and a preparation method thereof. Background technique [0002] Sleeve grout for steel bar connection, as the main bonding material between steel bar and sleeve, plays an important role in the field of prefabricated concrete buildings that are more and more widely used. Its quality is directly related to the reliability of the connection between steel bar and sleeve, and even affects the safety of the building structure. [0003] As a cement-based building material, the sleeve grouting material for steel bar connection is deeply affected by the ambient temperature in the grouting construction project of prefabricated concrete buildings. 2015) clearly mentioned: "During grouting construction, the ambient temperature should meet the requirements of the grouting material product instruction manual; whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16
CPCC04B28/16C04B7/02C04B18/141C04B14/104C04B14/047C04B14/106C04B24/383C04B24/06C04B24/38C04B24/085C04B22/085C04B24/02C04B14/024C04B2103/302C04B2103/0068C04B24/42C04B14/068C04B14/06C04B14/324C04B14/34C04B22/002
Inventor 杨国刚朱海军黄键黄金涛
Owner 武汉合创炬盛科技有限公司