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Barium aluminate concrete swelling agent and preparation method thereof

A technology of barium aluminate and expansion agent, which is applied in the field of building materials, can solve problems such as poor control of expansion concrete preparation and failed engineering cases, and achieve the effects of increased compactness, improved strength, and extended service life

Active Publication Date: 2019-11-15
合肥净龙环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, it is precisely because of the influence of the above factors that the preparation of expansive concrete cannot be well controlled, resulting in some failed engineering cases

Method used

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  • Barium aluminate concrete swelling agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of barium aluminate concrete expansion agent of the present invention, its preparation method is as follows:

[0040] Step 1. Take an appropriate amount of barium carbonate and alumina, and dry them at a temperature of 110±5°C; according to BaCO 3 :Al 2 o 3 = 2:1 weight percentage Weigh and mix each material, and then grind to 4.6% of 0.08mm square hole sieve to obtain raw meal, set aside;

[0041] Step 2. Add 2% soluble starch and an appropriate amount of water to the raw meal prepared in step 1. The amount of water added is based on the amount of water that can be pressed into shape. Stir evenly, then press into shape, and dry;

[0042] Step 3. Put the raw material dried in step 2 into a high-temperature furnace, and heat it at 1300°C for 120 minutes, and then burn it into barium aluminate clinker A; after the heat preservation is completed, take out the material and cool it to room temperature;

[0043] Step 4: Do batching according to the ratio of barium a...

Embodiment 2

[0046] A kind of barium aluminate concrete expansion agent of the present invention, its preparation method is as follows:

[0047] Step 1. Take an appropriate amount of barium carbonate and alumina, and dry them at a temperature of 110±5°C; according to BaCO 3 :Al 2 o 3 = 2:1 weight percentage Weigh and mix each material, and then grind to 4.6% of 0.08mm square hole sieve to obtain raw meal, set aside;

[0048] Step 2. Add 2% soluble starch and an appropriate amount of water to the raw meal prepared in step 1. The amount of water added is based on the amount of water that can be pressed into shape. Stir evenly, then press into shape, and dry;

[0049] Step 3. Put the raw material dried in step 2 into a high-temperature furnace, and keep it warm at 1400°C for 60 minutes, and then burn it into barium aluminate clinker B; after the heat preservation is over, take out the material and cool it to room temperature;

[0050] Step 4, batching according to the ratio of barium alumi...

Embodiment 3

[0053] A kind of barium aluminate concrete expansion agent of the present invention, its preparation method is as follows:

[0054] Step 1. Take an appropriate amount of barium carbonate and alumina, and dry them at a temperature of 110±5°C; according to BaCO 3 :Al 2 o 3 = 2:1 weight percentage Weigh and mix each material, and then grind to 4.6% of 0.08mm square hole sieve to obtain raw meal, set aside;

[0055] Step 2. Add 2% soluble starch and an appropriate amount of water to the raw meal prepared in step 1. The amount of water added is based on the amount of water that can be pressed into shape. Stir evenly, then press into shape, and dry;

[0056] Step 3. Put the raw material dried in step 2 into a high-temperature furnace, and heat it at 1350°C for 90 minutes to produce barium aluminate clinker C; after the heat preservation is completed, take out the material and cool it to room temperature;

[0057] Step 4, batching according to the ratio of barium aluminate clinker...

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Abstract

The invention discloses a barium aluminate concrete swelling agent. The barium aluminate concrete swelling agent is prepared from, by weight, 50-60% of a barium aluminate clinker, 40-50% of anhydriteand anhydrous aluminum sulfate with the weight accounting for 0-5.0% of the total weight of the barium aluminate clinker and the anhydrite, wherein the barium aluminate clinker is formed by mixing, forming and calcining a raw material, soluble starch and water in sequence; the raw material is prepared by mixing and grinding barium carbonate and aluminum oxide in a weight ratio of 2:1. The preparation method comprises the following steps that the barium carbonate and the aluminum oxide are prepared into the raw material; the soluble starch and a proper amount of water are added to the raw material for uniform stirring, and then, the mixture is compressed, formed and dried; the dried mixture is calcined at the temperature of 1350+ / -50 DEG C, the temperature is maintained for 60-120 minutes,and then the barium aluminate clinker is obtained; the clinker is taken out and cooled to room temperature; the anhydrite, the anhydrous aluminum sulfate and the barium aluminate clinker are mixed andground, and then the swelling agent is prepared. The total swelling capacity of the swelling agent is high, the swelling time can be flexibly adjusted, along with the generation of a barium sulfate precipitate, the compactness of the concrete is increased, and the strength of the concrete is easily improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a barium aluminate concrete expansion agent and a preparation method thereof. Background technique [0002] During the pouring and hardening process of concrete, volume shrinkage will occur due to reasons such as chemical shrinkage, cold shrinkage, and dry shrinkage. These shrinkages can cause cracks inside the concrete, resulting in a reduction in its strength, impermeability, frost resistance and durability. Adding an appropriate amount of expansion agent to ordinary concrete is the most common method used in engineering to control its cracks. At present, the most widely used expansion agents are sulphoaluminate-based expansion agents, lime-based expansion agents, magnesium oxide-based expansion agents and composite expansion agents. [0003] The main requirements for the expansion effect of the expansion agent: one is the size of the expansion effect, and the othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14
CPCC04B40/0042C04B22/10C04B22/06C04B22/143C04B22/148
Inventor 刘辉敏罗伟阳勇福茹晓红肜芳珍
Owner 合肥净龙环保科技有限公司
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