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High-strength fly ash brick and preparation method thereof

A fly ash brick and high-strength technology, which is applied in the field of high-strength fly ash brick and its preparation, can solve the problem of indurability, low activation utilization rate of fly ash, poor cementitiousness and freeze-thaw resistance of fly ash And other issues

Inactive Publication Date: 2021-11-26
涡阳县晟丰新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the comprehensive utilization of fly ash, it is mainly used for fly ash building materials. However, due to the poor gelatinization and freeze-thaw resistance of fly ash, it is not durable, and it is easy to cause dust and sand, so the amount of fly ash is relatively low.
The autoclaved fly ash bricks currently used in the market are mainly for the activation and utilization of fly ash. Doped with fly ash that has not been activated and utilized, the final fly ash brick has low compressive strength, weak tensile strength, poor crack resistance, poor stability, and is easily affected by the environment and thus affects the quality of the brick

Method used

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  • High-strength fly ash brick and preparation method thereof
  • High-strength fly ash brick and preparation method thereof
  • High-strength fly ash brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of flame retardant components:

[0034] Step S11, mixing methyl hydroxybenzoate and tetrahydrofuran, adding phosphorus oxychloride at 0°C, then adding pyridine, and stirring for 35 minutes to obtain intermediate 1;

[0035] Step S12, mix p-hydroxybenzaldehyde, dichloromethane and triethylamine, pass through nitrogen to protect and stir to cool down to 0°C, then add intermediate 1, stir and react for 7h, after the reaction, the obtained reactant is deionized Wash with water three times, then adjust the pH value to 9 with sodium hydroxide, wash with deionized water until the washing liquid is neutral, and then dry with anhydrous sodium sulfate. After drying, concentrate under reduced pressure to remove the solvent to obtain the intermediate 2;

[0036] Step S13, under the condition of nitrogen protection, mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and toluene, heat to reflux, then add intermediate 2, after the addition, The reaction was continued...

Embodiment 2

[0041] Prepare enhancer:

[0042] Mix brucite fiber and absolute ethanol to prepare a slurry, add polyphosphoric acid ethanol solution to the slurry, heat and reflux for 10 minutes, then add flame retardant components while stirring, continue to react for 2 hours, then filter the reaction mixture, filter The cake was washed with absolute ethanol, and dried under vacuum at 50° C. for 6 hours after washing to obtain the enhancer.

[0043]Among them, the dosage ratio of brucite fiber and absolute ethanol in the slurry is 1g:20mL; the ethanol solution of polyphosphoric acid is a mixture of polyphosphoric acid and absolute ethanol according to 1g:5mL; the ethanol solution of slurry, polyphosphoric acid and flame retardant The dosage ratio of the components is 20mL: 4mL: 0.2g, and the flame retardant component is prepared in Example 1.

Embodiment 3

[0045] Prepare enhancer:

[0046] Mix brucite fiber and absolute ethanol to prepare a slurry, add polyphosphoric acid ethanol solution to the slurry, heat and reflux for 10 minutes, then add flame retardant components while stirring, continue to react for 2 hours, then filter the reaction mixture, filter The cake was washed with absolute ethanol, and dried under vacuum at 50°C for 6 hours after washing to obtain the enhancer.

[0047] Among them, the dosage ratio of brucite fiber and absolute ethanol in the slurry is 1g:20mL; the ethanol solution of polyphosphoric acid is a mixture of polyphosphoric acid and absolute ethanol according to 1g:5mL; the ethanol solution of slurry, polyphosphoric acid and flame retardant The dosage ratio of the components is 20mL: 3mL: 0.25g, and the flame retardant component is prepared in Example 1.

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Abstract

The invention discloses a high-strength fly ash brick and a preparation method thereof, and belongs to the technical field of building material preparation, the preparation method of the fly ash brick comprises the following steps: 1, mixing and stirring fly ash, gypsum, calcium carbonate, calcium chloride and potassium sulfate to obtain a mixture; mixing and stirring the mixture with a reinforcing agent, cement and zeolite in parts by weight, and adding water in the stirring process to obtain a mixed material; and 2, carrying out digestion treatment on the mixed material; carrying out compression molding treatment to obtain a green body, transferring the obtained green body into a still kettle, and curing for 12 hours to obtain the high-strength fly ash brick. The reinforcing agent in raw materials of the fly ash brick takes brucite fiber as a matrix, the surface of the brucite fiber is coated with a layer of polyphosphoric acid, the polyphosphoric acid and a flame-retardant component are combined in an ionic bond or coordination form, the flame-retardant component is introduced into the surface of the brucite fiber to form a polyphosphamide coating layer, the mechanical property is improved by adding the reinforcing agent, and the flame retardant property is improved.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to a high-strength fly ash brick and a preparation method thereof. Background technique [0002] As a solid discharge from power plants, fly ash is difficult to deal with and expensive to deal with. At the same time, the stacking of fly ash is harmful to the environment, mainly because it occupies land and flies with the wind, polluting the atmosphere and the surrounding environment. Therefore, it is very important to carry out the utilization of fly ash. In the comprehensive utilization of fly ash, it is mainly used for fly ash building materials. However, due to the poor gelatinization and freeze-thaw resistance of fly ash, it is not durable, and it is easy to cause dust and sand, so the amount of fly ash is relatively low. . The autoclaved fly ash bricks currently used in the market are mainly for the activation and utilization of fly ash. Dop...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/42C04B22/16C04B14/46C04B24/02C07F9/6574C04B111/28
CPCC04B28/14C04B14/4643C04B24/165C04B24/42C04B40/0039C07F9/657172C04B2111/28C04B2201/50C04B18/08C04B7/00C04B14/28C04B22/124C04B14/047C04B22/147C04B24/026C04B22/165C04B2103/63
Inventor 孙伟
Owner 涡阳县晟丰新型建材有限公司
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