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Lightweight concrete building material and preparation method thereof

A technology for lightweight concrete and building materials, applied in ceramic products, applications, household appliances, etc., can solve the problems of easy water absorption and low strength, and achieve the effect of low water absorption, good strength and good light weight

Inactive Publication Date: 2019-12-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects of low strength and easy water absorption in the existing foamed concrete, the present invention proposes a lightweight concrete building material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing lightweight concrete building materials includes the following steps:

[0027] (1) Mix and grind the red mud, fly ash, and bentonite, pass through a 100-mesh sieve, add hydroxypropyl methylcellulose, polyacrylamide, sodium bicarbonate, and appropriate amount of water, stir to form a paste material, and then pass the pelletizer Prepared and dried into elastic particles with a diameter of 3-5mm; 15 parts of red mud, 8 parts of fly ash, 3 parts of bentonite, 0.02 parts of hydroxypropyl methylcellulose, 0.01 parts of polyacrylamide, and 0.2 parts of sodium bicarbonate.

[0028] Among them, red mud, fly ash, and bentonite come from an aluminum plant, thermal power plant and chemical plant in Sichuan, respectively. The main chemical components of each substance are shown in Table 1;

[0029] Table 1 The main chemical components of red mud, fly ash and bentonite

[0030] Main ingredientsSiO 2

Al 2 O 3

Fe 2 O 3

CaO MgONa 2 O

K 2 O

other Red mud (%)35....

Embodiment 2

[0035] A method for preparing lightweight concrete building materials includes the following steps:

[0036] (1) Mix and grind the red mud, fly ash, and bentonite, pass through a 100-mesh sieve, add hydroxypropyl methylcellulose, polyacrylamide, sodium bicarbonate, and appropriate amount of water to stir into a paste-like material, and pass it through a pellet machine Prepare and dry into elastic particles with a particle size of 3-5mm; 10 parts of red mud, 5 parts of fly ash, 10 parts of bentonite, 0.03 parts of hydroxypropyl methylcellulose, 0.0 parts of polyacrylamide, and 0.4 parts of sodium bicarbonate.

[0037] Among them, red mud, fly ash, and bentonite come from an aluminum plant, thermal power plant and chemical plant in Sichuan, and the main chemical composition of each substance is the same as in Table 1.

[0038] (2) Prepare the glue solution with glass powder, ethylene vinyl acetate copolymer redispersible latex powder, and water, pass the elastic particles obtained in s...

Embodiment 3

[0042] A method for preparing lightweight concrete building materials includes the following steps:

[0043] (1) Mix and grind the red mud, fly ash, and bentonite, pass through a 100-mesh sieve, add hydroxypropyl methylcellulose, polyacrylamide, sodium bicarbonate, and appropriate amount of water to stir into a paste-like material, and pass it through a pellet machine Prepare and dry into elastic particles with a particle size of 3-5mm; 10 parts of red mud, 3 parts of fly ash, 5 parts of bentonite, 0.03 parts of hydroxypropyl methylcellulose, 00.5 parts of polyacrylamide, and 0.5 parts of sodium bicarbonate.

[0044] Among them, red mud, fly ash, and bentonite come from an aluminum plant, thermal power plant, and chemical plant in Sichuan, respectively, and the main chemical components of each substance are the same as in Table 1.

[0045] (2) Prepare the glue solution with glass powder, ethylene vinyl acetate copolymer redispersible latex powder, and water, pass the elastic particle...

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Abstract

The invention belongs to the technical field of building material preparation, and particularly relates to a lightweight concrete building material and a preparation method thereof. According to the invention, red mud, coal ash, bentonite and glass powder are bonded through auxiliary hydroxypropyl methyl cellulose and polyacrylamide to prepare elastic particles, the elastic particles are foamed, expanded and dried due to the gas release of sodium bicarbonate at a high temperature, red mud ceramsite is formed by sintering at a high temperature of 1150 DEG C, and the micro-pores on the surface of the ceramsite are sealed based on the fluidity of the glass powder on the surfaces of the particles after burning out so as to obtain the light red mud ceramsite, wherein the obtained ceramsite hascharacteristics of light weight and good toughness, can substantially reduce the density of cement-based concrete so as to achieve light weight; and the obtained ceramsite is different from conventional foamed concrete, has characteristics of light weight and closed pores on the surface, does not adsorb inorganic gels so as to ensure the good lightweight, further has good strength and no surface gap, and further has characteristics of low water absorption rate and good strength in lightweight concrete building materials.

Description

Technical field [0001] The invention belongs to the technical field of building material preparation, and specifically relates to a lightweight concrete building material and a preparation method. Background technique [0002] Concrete, abbreviated as "concrete (tóng)": refers to a collective term for engineering composite materials in which aggregates are cemented into a whole by cementing materials. Generally speaking, the term concrete refers to the cement concrete that uses cement as cementing material and sand and stone as aggregate; it is mixed with water (may contain admixtures and admixtures) in a certain proportion, and the cement concrete obtained by mixing is also called ordinary Concrete, it is widely used in civil engineering. [0003] According to the actual density of the concrete itself, it can be divided into three types, one is heavy-duty concrete, one is light-weight concrete, and the other is the most common and most versatile ordinary concrete. Among them, li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/02C04B38/08
CPCC04B18/027C04B28/04C04B18/023C04B18/0409C04B18/08C04B14/104C04B24/383C04B24/2652C04B22/10C04B14/22C04B24/26C04B14/06C04B14/38C04B2103/302C04B22/142C04B24/04
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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