Alkali-activated slag geopolymer concrete and preparing method thereof

A geopolymer and slag-based technology, applied in the field of alkali-activated slag-based geopolymer concrete and its preparation, to achieve high strength, good heat insulation performance, and good durability

Active Publication Date: 2016-11-09
上海德滨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applying recycled micropowder of construction waste to the preparation of alkali-activated gelling materials can effectively utilize waste and reduce environmental pressure on the one hand, and can greatly reduce the production cost of alkali-activated gelling materials on the other hand, which is not seen in the prior art to report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material formula of alkali-activated slag-based geopolymer concrete includes components: 210 parts of S105 slag powder, 20 parts of construction waste recycled micropowder, 400 parts of sand, 240 parts of water glass with a modulus of 2.5, and 50 parts of solid sodium hydroxide.

[0028] Its preparation method comprises the following steps:

[0029] 1) Mix slag powder, construction waste recycled micropowder, sand, and coarse aggregate according to the ratio to obtain dry material;

[0030] 2) solid sodium hydroxide is dissolved in water glass according to proportioning, must be dissolved with the water glass solution of sodium hydroxide;

[0031] 3) adding the water glass solution dissolved with sodium hydroxide obtained in step 2) into the dry material obtained in step 1), and mixing;

[0032] 4) The product of step 3) is poured, covered with a film for curing, and the product is obtained.

[0033] The 28-day compressive strength of the prepared alkali-act...

Embodiment 2

[0035] The raw material formula of alkali-activated slag-based geopolymer concrete includes components: 160 parts of S105 slag powder, 40 parts of construction waste recycled micropowder, 400 parts of sand, 240 parts of water glass with a modulus of 2.0, and 40 parts of solid sodium hydroxide.

[0036] Its preparation method is identical with embodiment 1.

[0037] The 28-day compressive strength of the prepared alkali-activated slag-based geopolymer concrete is 75MPa, and the 3-day compressive strength reaches 43MPa.

Embodiment 3

[0039] The raw material formula of alkali-activated slag-based geopolymer concrete includes components: 150 parts of S95 slag powder, 60 parts of construction waste recycled micropowder, 400 parts of sand, 240 parts of water glass with a modulus of 3.3, and 40 parts of solid sodium hydroxide.

[0040] Its preparation method is identical with embodiment 1.

[0041] The 28-day compressive strength of the prepared alkali-activated slag-based geopolymer concrete is 76MPa, and the 3-day compressive strength reaches 42MPa.

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Abstract

The invention provides alkali-activated slag geopolymer concrete. The geopolymer concrete is a compound powder cementing material is formed by slag powder and construction waste renewable micro powder under the priming action of a water glass solution of sodium hydroxide. The alkali-activated slag geopolymer concrete is prepared from, by weight, 150-210 parts of slag powder, 20-60 parts of construction waste renewable micro powder, 190-240 parts of water glass, 25-50 parts of solid sodium hydroxide, 400-700 parts of sand and 0-1600 parts of coarse aggregate. Being prepared from slag powder, construction waste renewable micro powder, water glass, solid sodium hydroxide, sand and coarse aggregate, the alkali-activated slag geopolymer concrete has the advantages of being high in early strength, high in durability, high temperature resistance, corrosion resistance and heat-insulating property and low in production energy consumption and is green building material low in cost and high in performance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an alkali-activated slag-based geopolymer concrete and a preparation method thereof. Background technique [0002] The current common technical route in my country's construction waste resource industry is to process construction waste into recycled coarse aggregate and recycled fine aggregate, and then apply them. However, due to the large content of waste fired clay bricks in my country's construction waste, clay bricks have low strength and porosity The rate is high, and the recycled aggregate produced is difficult to meet the technical indicators required by the national standards. This is the bottleneck problem encountered by my country's construction waste recycling industry. If the construction waste rich in fired clay bricks is ground into fine powder, the disadvantage of low strength can be avoided. At the same time, due to the high content of amorphous substances in fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2201/50C04B18/141C04B18/16C04B22/062C04B14/06C04B14/00Y02P40/10
Inventor 刘琼徐双立徐东升曹丽
Owner 上海德滨环保科技有限公司
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