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High-performance geopolymer concrete and preparation method thereof

A geopolymer and concrete technology, applied in the field of concrete, can solve the problems of self-shrinkage and brittleness, and achieve the effects of improving brittleness, promoting volume stability, and inhibiting self-shrinking

Pending Publication Date: 2022-02-01
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention mixes ceramic balls and steel fibers into geopolymer concrete, effectively improving the defects of existing geopolymer concrete such as self-shrinkage and high brittleness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An embodiment of the high-performance geopolymer concrete of the present invention, the high-performance geopolymer concrete includes the following raw materials in parts by mass:

[0031] 1580 parts of mineral powder, 160 parts of silica fume, 260 parts of fly ash, 1040 parts of fine aggregate, 200 parts of ceramic ball aggregate with a particle size of 6 mm, 880 parts of activator, 195 parts of steel fiber, 24 parts of water reducing agent, water 106 parts; the activator is a mixture of 120 parts of sodium hydroxide and 760 parts of sodium silicate solution; the fine aggregate includes 174 parts of coarse sand, 346 parts of medium sand, and 520 parts of fine sand.

[0032] The preparation method of described high-performance geopolymer concrete, comprises the steps:

[0033] (1) Mix fine aggregate, mineral powder, fly ash and silica fume to form component A; mix activator, water reducing agent and water to form component B;

[0034] (2) Stir component A for 2 minutes...

Embodiment 2

[0037] An embodiment of the high-performance geopolymer concrete of the present invention, the high-performance geopolymer concrete includes the following raw materials in parts by mass:

[0038] 1580 parts of mineral powder, 160 parts of silica fume, 260 parts of fly ash, 860 parts of fine aggregate, 400 parts of ceramic ball aggregate with a particle size of 6mm, 880 parts of activator, 156 parts of steel fiber, 23 parts of water reducing agent, water 84 parts; the activator is a mixture of 120 parts of sodium hydroxide and 760 parts of sodium silicate solution; the fine aggregate includes 142 parts of coarse sand, 288 parts of medium sand, and 430 parts of fine sand.

[0039] The preparation method of the high-performance geopolymer concrete is the same as in Example 1.

Embodiment 3

[0041] An embodiment of the high-performance geopolymer concrete of the present invention, the high-performance geopolymer concrete includes the following raw materials in parts by mass:

[0042] 1580 parts of mineral powder, 160 parts of silica fume, 260 parts of fly ash, 680 parts of fine aggregate, 600 parts of ceramic ball aggregate with a particle size of 6 mm, 880 parts of activator, 120 parts of steel fiber, 22 parts of water reducing agent, water 56 parts; the activator is a mixture of 120 parts of sodium hydroxide and 760 parts of sodium silicate solution; the fine aggregate includes 112 parts of coarse sand, 228 parts of medium sand, and 340 parts of fine sand.

[0043] The preparation method of the high-performance geopolymer concrete is the same as in Example 1.

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Abstract

The invention discloses a high-performance geopolymer concrete and a preparation method thereof. The geopolymer concrete is prepared from, by mass, 1550 to 1600 parts of mineral powder, 155 to 165 parts of silica fume, 250 to 270 parts of fly ash, 500 to 1200 parts of fine aggregate, 200 to 800 parts of ceramic ball aggregate, 867 to 892 parts of an exciting agent, 78 to 234 parts of fiber, 20 to 24 parts of a water reducing agent and 0 to 109 parts of water. Ceramic balls and the steel fibers are co-doped into the geopolymer concrete, the fibers can effectively hinder the formation of microcracks in the concrete and significantly improve the tensile strength, bending resistance and impact resistance of the concrete, and the ceramic ball aggregate can inhibit the self-constriction phenomenon of the geopolymer concrete and promote the performance of good volume stability and durability, high hardness and small density of the concrete, and is compounded with other raw materials of the concrete to effectively improve the defects of self-constriction and high brittleness of the existing geopolymer concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a high-performance geopolymer concrete and a preparation method thereof. Background technique [0002] Geopolymer is a new type of green bonding material composed of a variety of aluminosilicate materials rich in aluminum and silicon elements. Aluminosilicate materials are mainly composed of industrial by-products such as fly ash, blast furnace slag, silica fume, metakaolin, clay and other natural sources. Due to its extremely low carbon footprint, geopolymers are considered to be an ideal building material, while geopolymer concrete is activated by geopolymers under the action of alkali activators, and is formed by curing under high temperature conditions. A new type of geopolymer concrete has the advantages of high strength, low permeability and good durability. However, the current research shows that this type of concrete still has the disadvantages of high bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/02C04B14/48C04B7/26C04B111/34
CPCC04B28/006C04B14/48C04B18/023C04B7/243C04B2111/343C04B2111/00017C04B2201/50C04B14/06C04B12/04C04B22/062C04B2103/302Y02P40/10
Inventor 刘坚刘成苏宇
Owner GUANGZHOU UNIVERSITY
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