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Lightweight high-strength foam concrete

A foam concrete, high-strength technology, applied in the field of concrete, can solve the problem of poor bonding performance between polypropylene fiber and cement matrix, and achieve the effect of improving hydrophilicity and cohesion

Active Publication Date: 2021-11-02
南通吉泰新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the poor bonding performance between polypropylene fiber and cement matrix, the application provides a lightweight high-strength foam concrete and its preparation method

Method used

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  • Lightweight high-strength foam concrete
  • Lightweight high-strength foam concrete
  • Lightweight high-strength foam concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of lightweight high-strength foam concrete, comprising the following steps:

[0052] S1. 30g dibenzoyl peroxide is added in xylene solution, is mixed with the dibenzoyl peroxide solution of 0.3mol / L concentration.

[0053] S2. Continuously feed nitrogen into the flask at a rate of 80 g / min, and add the dibenzoyl peroxide solution and polypropylene fibers into the flask.

[0054]S3. Stir the polypropylene fiber and dibenzoyl peroxide solution under a nitrogen atmosphere, then heat up to 50°C, swell at a constant temperature for 45 minutes, continue to heat up the dibenzoyl peroxide solution to 60°C, and react at a constant temperature for 30 minutes to obtain polypropylene- A solid-liquid mixture of dibenzoyl peroxide.

[0055] S4. After draining the liquid in the solid-liquid mixture, pour 2500g of absolute ethanol into the solid for washing, and then add 800g of water for washing after the absolute ethanol washing is completed to obtain polypropyl...

Embodiment 2

[0062] A preparation method of lightweight high-strength foam concrete, comprising the following steps:

[0063] S1. 30g dibenzoyl peroxide is added in xylene solution, is mixed with the dibenzoyl peroxide solution of 0.3mol / L concentration.

[0064] S2. In the flask, continue to feed nitrogen gas at a rate of 100 g / min, and add the dibenzoyl peroxide solution and polypropylene fibers into the flask.

[0065] S3. Stir the polypropylene fiber and dibenzoyl peroxide solution under a nitrogen atmosphere, then heat up to 55°C, and swell at a constant temperature for 47 minutes; continue to heat up the dibenzoyl peroxide solution to 75°C, and react at a constant temperature for 35 minutes to obtain polypropylene- A solid-liquid mixture of dibenzoyl peroxide.

[0066] S4. After draining the liquid in the solid-liquid mixture, pour 3000g of absolute ethanol into the solid for washing, and then add 900g of water for washing after the absolute ethanol washing is completed, to obtain p...

Embodiment 3

[0073] A preparation method of lightweight high-strength foam concrete, comprising the following steps:

[0074] S1. 30g dibenzoyl peroxide is added in xylene solution, is mixed with the dibenzoyl peroxide solution of 0.3mol / L concentration.

[0075] S2. In the flask, continue to feed nitrogen gas at a speed of 120g / min, and add the dibenzoyl peroxide solution and polypropylene fibers into the flask.

[0076] S3. Stir the polypropylene fiber and dibenzoyl peroxide solution under a nitrogen atmosphere, then heat up to 60°C, swell at a constant temperature for 50 minutes, continue to heat up the dibenzoyl peroxide solution to 90°C, and react at a constant temperature for 40 minutes to obtain polypropylene- A solid-liquid mixture of dibenzoyl peroxide.

[0077] S4. After draining the liquid in the solid-liquid mixture, pour 3500g of absolute ethanol into the solid for washing, and then add 1000g of water for washing after the absolute ethanol washing is completed to obtain polyp...

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Abstract

The invention relates to the technical field of concrete, and particularly discloses lightweight high-strength foam concrete and a preparation method thereof. The lightweight high-strength foam concrete is prepared from the following raw materials in parts by weight: Portland cement and modified polypropylene fibers, and the modified polypropylene fiber is prepared from the following raw materials in parts by weight: a dibenzoyl peroxide solution, polypropylene fiber and a maleic acid solution. The preparation method of the lightweight high-strength foam concrete comprises the following steps: adding dibenzoyl peroxide into a xylene solution to prepare a mixed solution; adding polypropylene fibers into the mixed solution, performing swelling firstly, and then performing a reaction; then adding a maleic acid aqueous solution, and performing reacting to obtain a reaction crude product; drying the crude product to obtain modified polypropylene fiber; and mixing cement and water, then adding the modified polypropylene fiber and the additive, and performing stirring to obtain the cement slurry. The method can be used for improving the interface bonding performance of the polypropylene fiber and the cement matrix, and has the effect of improving the concrete strength.

Description

technical field [0001] The present application relates to the technical field of concrete, in particular to a lightweight high-strength foam concrete. Background technique [0002] At present, there are generally two types of foamed concrete, which are divided into physically foamed porous concrete and chemically foamed porous concrete according to the preparation process. [0003] Related technologies can refer to the Chinese invention patent with the authorized announcement number CN104119101B, which discloses a construction process for pouring lightweight foam concrete. The process includes the following steps: preliminary preparation; preparation of cement slurry solution: putting cement and fly ash into the mixing bucket Stir; prepare the foaming agent aqueous solution: weigh the foaming agent, then add the foaming agent and water into the mixing bucket of the hydraulic foaming machine and stir evenly to form the foaming agent aqueous solution; prepare foamed concrete: ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/02C04B20/02C04B111/40
CPCC04B28/04C04B20/023C04B2111/40C04B2201/50C04B2201/20C04B16/0633C04B2103/12C04B2103/302C04B2103/65C04B22/068C04B38/02Y02W30/91
Inventor 施蓓晶张宸源钱海荣
Owner 南通吉泰新型建材有限公司
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