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High-strength muck unfired product and preparation method thereof

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

Active Publication Date: 2019-11-29
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 muck unfired product and preparation method thereof
  • High-strength muck unfired product and preparation method thereof
  • High-strength muck unfired product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] High-strength slag-free burning products

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

[0055] The particle size distribution of the slag is such 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-free burning product

[0057] Air-dry, pulverize, 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-free sintered product, the particle size distribution is 6, and the coefficient of curvature is 2; Slag to a specific surface area of ​​400m 2 / kg of fine powder, fully mix the slag and blast furnace slag, so that the blast furnace slag coats the surface of the slag to obtain a solid mixture;

[0058] Mix NaOH, water gla...

Embodiment 2

[0062] High-strength slag-free burning products

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

[0064] The particle size distribution of the slag is such that the coefficient of inhomogeneity is 6.5 and the coefficient of curvature is 1.5; 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-free burning product

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

[0067] Mix KOH, water glass and...

Embodiment 3

[0071] High-strength slag-free burning products

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

[0073] The particle size distribution of the slag is such that the coefficient of inhomogeneity is 7, and the coefficient of curvature is 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-free burning product

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

[0076] Mix NaOH, water glass and wa...

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Abstract

The invention discloses a high-strength muck unfired product and a preparation method thereof. The high-strength muck unfired product is prepared from the components in parts by weight: 20-50 parts ofblast furnace slag, 50-90 parts of muck, and 8-30 parts of an alkali-activator. According to the high-strength muck unfired product, the surface of the muck is coated with the blast furnace slag, calcium ions are released in an alkaline solution, the calcium ions substitute low-valence positive ions adsorbed on the surface of clay particles in the muck, the thicknesses of double electric layers on the surfaces of the clay particles are decreased, the distance between the particles become small, compaction is conducted under the action of the external pressure, and a more compact structure isobtained; active components in the blast furnace slag reacts with the alkali-activator to generate gelling substances such as C-A-S-H, the gelling substances are connected with muck particles, the early strength is formed, and sun cracking caused by water losing of the muck can be resisted; and under the high-alkaline condition, silicon oxide and aluminum oxide in the muck are released slowly to react with the alkali-activator in a pore solution, a geopolymer is generated, on the one hand, pores are filled, on the other hand, the muck particles are cemented better, and thus the long-term strength of the product is improved.

Description

technical field [0001] The present invention relates to the field of construction and materials, in particular, to a high-strength slag-free burning product. In addition, the present invention also relates to a preparation method of the above-mentioned high-strength slag-free burning product. Background technique [0002] Blast furnace slag is a kind of waste slag discharged from blast furnace when smelting pig iron. When smelting pig iron in a blast furnace, the raw materials added from the blast furnace, in addition to iron ore and fuel (coke), also need to add a flux. When the furnace temperature reaches 1400℃~1600℃, the flux reacts with iron ore at high temperature to generate pig iron and slag. Blast furnace slag is composed of gangue, ash, flux and other impurities that cannot enter into pig iron, and is a fusible mixture. From the chemical composition point of view, blast furnace slag is a silicate material. With the development of the iron and steel smelting indu...

Claims

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Application Information

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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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