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High-strength slag-free burning product and preparation method thereof

A high-strength, slag technology, applied in the field of construction and materials, can solve the problems of high cost of building materials, pollution, large amount of solid waste, etc., and achieve the effect of improving long-term strength, reducing costs, and good anti-freeze and thawing characteristics.

Active Publication Date: 2021-12-31
CHINA CONSTR FIFTH ENG DIV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-strength slag-soil non-fired product to solve the technical problems of large stock of solid waste, high cost of building materials and serious pollution

Method used

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  • High-strength slag-free burning product and preparation method thereof
  • High-strength slag-free burning product and preparation method thereof
  • High-strength slag-free burning product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] High-strength slag-free fired products

[0054] Including: blast furnace slag 300g, slag 900g (water content less than 3%), water glass 128g, NaOH 25.6g, water 38.4g;

[0055] The particle size distribution of the slag is that the coefficient of inhomogeneity is 6, and the coefficient of curvature is 2; the specific surface area of ​​blast furnace slag is 400m 2 / kg of fine powder, the modulus of water glass is 2.8.

[0056] Preparation method of high-strength slag-soil unfired product

[0057] Air-dry the dregs, pulverize, sieve, control and adjust the particle size of the dregs to be less than 1 / 10 of the size of high-strength dregs unfired products, the particle size distribution is 6, the coefficient of curvature is 2; crush the blast furnace Slag to a specific surface area of ​​400m 2 / kg of fine powder, the slag and blast furnace slag are fully mixed, so that the blast furnace slag covers the surface of the slag to obtain a solid mixture;

[0058] Mix NaOH, wa...

Embodiment 2

[0062] High-strength slag-free fired products

[0063] Including: 400g of blast furnace slag, 800g of slag (water content less than 3%), 128g of water glass, 30g of KOH, and 34g of water;

[0064] The particle size distribution of slag is 6.5 inhomogeneity coefficient and 1.5 in curvature coefficient; the specific surface area of ​​blast furnace slag is 420m 2 / kg of fine powder, the modulus of water glass is 3.

[0065] Preparation method of high-strength slag-soil unfired product

[0066] Air-dry, pulverize and sieve the slag, control and adjust the particle size of the slag to be less than 1 / 10 of the size of the high-strength slag unfired product, the particle size distribution is 6.5, and the curvature coefficient is 1.5; Slag to specific surface area is 420m 2 / kg of fine powder, the slag and blast furnace slag are fully mixed, so that the blast furnace slag covers the surface of the slag to obtain a solid mixture;

[0067] Mix KOH, water glass and water, let it stan...

Embodiment 3

[0071] High-strength slag-free fired products

[0072] Including: 480g of blast furnace slag, 720g of slag (water content less than 3%), 128g of water glass, 20.5g of NaOH, 43.5g of water;

[0073] The particle size distribution of the slag is 7 with a coefficient of inhomogeneity and a coefficient of curvature of 2.6; the specific surface area of ​​blast furnace slag is 450m 2 / kg of fine powder, the modulus of water glass is 3.1.

[0074] Preparation method of high-strength slag-soil unfired product

[0075] Air-dry, pulverize and sieve the slag, control and adjust the particle size of the slag to be less than 1 / 10 of the size of the high-strength slag unfired product, the particle size distribution is 7, the coefficient of curvature is 2.6; crush the blast furnace Slag to specific surface area is 450m 2 / kg of fine powder, the slag and blast furnace slag are fully mixed, so that the blast furnace slag covers the surface of the slag to obtain a solid mixture;

[0076] Mi...

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Abstract

The invention discloses a high-strength slag-soil unfired product and a preparation method thereof, comprising: in parts by weight, 20-50 parts of blast furnace slag, 50-90 parts of slag, and 8-30 parts of an alkaline activator. In the high-strength slag-free fired product of the present invention, the blast furnace slag is coated on the surface of the slag, and calcium ions are released in the alkaline solution, and the calcium ions replace the low-priced cations adsorbed on the surface of the clay in the slag, and weaken the double ions on the surface of the clay. The thickness of the electric layer, the distance between the particles becomes smaller, and the compaction under the action of external pressure obtains a more dense structure. The active components in the blast furnace slag react with the alkaline activator to form gelling substances such as C-A-S-H, which connect the slag particles to form early strength and can resist the dry cracking caused by the water loss of the slag. Under high alkaline conditions, the silica and alumina in the slag are slowly released and react with the alkaline activator in the pore solution to form a geopolymer, which fills the pores on the one hand and better cements the slag on the other hand Soil particles, thereby improving the long-term strength of the product.

Description

technical field [0001] The invention relates to the fields of construction and materials, in particular to a high-strength dregs-soil unfired product. In addition, the present invention also relates to a preparation method of the above-mentioned high-strength dregs-soil unfired product. Background technique [0002] Blast furnace slag is a waste residue discharged from the blast furnace when smelting pig iron. When smelting pig iron in the blast furnace, the raw materials added from the blast furnace, in addition to iron ore and fuel (coke), also need to add flux. When the furnace temperature reaches 1400°C to 1600°C, the flux reacts with the iron ore to generate pig iron and slag. Blast furnace slag is a fusible mixture consisting of gangue, ash, flux and other impurities that cannot enter pig iron. In terms of chemical composition, blast furnace slag is a silicate material. With the development of the iron and steel smelting industry, the output of solid waste such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08
CPCC04B28/082C04B2201/50C04B18/142C04B18/16C04B22/062C04B12/04
Inventor 阳栋李水生杨子汉许宁傅炎朝
Owner CHINA CONSTR FIFTH ENG DIV CORP LTD
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