Air-generating agent for air-entrained concrete and its application method
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A technology of air-entrained concrete and air-entraining agent, applied in the field of building materials, can solve problems such as restricting the development of air-entrained concrete, and achieve the effects of low price, simplified production process and high strength
Inactive Publication Date: 2018-02-02
UNIV OF JINAN
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Problems solved by technology
Aluminum powder or aluminum powder paste air-generating agent has seriously restricted the development of the air-entrained concrete industry due to many problems in its production process, price and application.
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Embodiment 1
[0020] (1) Ferrosilicon powder, fineness 45um sieve is 2%, silicon content is 98%.
[0021] (2) Dissolve 4 grams of sodium hydroxide in water to prepare a 1.5% mass concentration sodium hydroxide solution, heat it to 60°C, add 1 gram of ferrosilicon powder, and stir for 1 min.
[0022] (3) According to the process flow of using aluminum powder air-generating agent to prepare air-entrained concrete, ferrosilicon powder is used as air-generating agent to prepare air-entrained concrete.
Embodiment 2
[0024] (1) Ferrosilicon powder, fineness 45um sieve is 4%, silicon content is 98%.
[0025] (2) Dissolve 6 grams of sodium hydroxide in water to make a sodium hydroxide solution with a mass concentration of 2.05%, heat it to 57°C, add 1 gram of ferrosilicon powder, and stir for 1.5 minutes.
[0026] (3) According to the process flow of using aluminum powder air-generating agent to prepare air-entrained concrete, ferrosilicon powder is used as air-generating agent to prepare air-entrained concrete.
Embodiment 3
[0028] (1) Ferrosilicon powder, fineness 45um sieve is 6%, silicon content is 98%.
[0029] (2) Dissolve 8 grams of sodium hydroxide in water to make a sodium hydroxide solution with a mass concentration of 2.55%, heat it to 55°C, add 1 gram of ferrosilicon powder, and stir for 2 minutes.
[0030] (3) According to the process flow of using aluminum powder air-generating agent to prepare air-entrained concrete, ferrosilicon powder is used as air-generating agent to prepare air-entrained concrete.
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Abstract
An air-generating agent for air-entrained concrete and its application method belong to the technical field of building materials. The gas generating agent of the present invention is composed of ferrosilicon powder with a silicon content ≥ 95%, and its fineness is 45um, and the sieve residue is 2-8%. At present, most of the air-generating agents used in aerated concrete are aluminum powder or aluminum paste air-generating agents with aluminum as the main component. Air concrete manufacturer. The ferrosilicon powder gas-generating agent with silicon as the main component provided by this invention solves the above-mentioned difficulties, and uses the technical principle that silicon can undergo a chemical reaction to generate hydrogen under alkaline conditions, and the chemical properties of silicon are more stable than aluminum, and can be used at normal temperature and pressure. It does not chemically react with air, which simplifies the production process, storage conditions and other issues. The price of silica fume in the market is also lower than that of aluminum, which can greatly reduce production costs. It has a great application prospect in the production of aerated concrete. .
Description
technical field [0001] The invention relates to a novel air-generating agent for aerated concrete and a method for using the same, belonging to the technical field of building materials. Background technique [0002] Air-entrained concrete has the advantages of light weight, heat preservation, and heat insulation. Driven by the national energy-saving and emission-reduction policy, the aerated concrete industry continues to develop. In the production of air-entrained concrete, air-generating agents play a vital role. At present, most of the gas-generating agents used in the market are aluminum powder or aluminum powder paste. The main raw material is aluminum ingots. The production process is relatively complicated, the price is relatively expensive, and the quality of aluminum ingots is also poor. question. [0003] Ferrosilicon powder has the advantages of relatively stable chemical properties and low market price. As a new material, it has been widely developed and utili...
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Application Information
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