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A water-proof steel slag aggregate with strong adhesion to asphalt and preparation method thereof

A technology of adhesive and water-proof materials, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor water absorption of steel slag, inconvenient modification of cement slurry, and hazardous operation Personnel health and other issues, to achieve the effect of inhibiting expansion, firm adhesion, and short modification time

Active Publication Date: 2021-12-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under high temperature and high pressure conditions, the use of CO 2 The steel slag is pretreated to form a layer of dense CaCO on the surface of the steel slag 3 , same as the above-mentioned treatment method, the treatment process is complicated and the cost is high
The third is to wrap the steel slag with inorganic materials (lime, cement, silica fume, etc.) and organic materials such as silicone resin, which hinders the contact between the steel slag and water, and the hydration volume expansion of the active material cannot be carried out, but the modification of the cement slurry is inconvenient. And the water absorption rate of the modified steel slag has not been improved
Silicone resin is a thermosetting plastic with high brittleness. It needs to be fully cured under high temperature conditions, and has a high viscosity at room temperature. It often needs to be diluted with organic solvents before use. These solvents are often toxic, pollute the environment, and endanger operators. health

Method used

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  • A water-proof steel slag aggregate with strong adhesion to asphalt and preparation method thereof
  • A water-proof steel slag aggregate with strong adhesion to asphalt and preparation method thereof
  • A water-proof steel slag aggregate with strong adhesion to asphalt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A method for preparing a water-resistant steel slag aggregate with strong adhesion to asphalt, comprising the following steps:

[0040] (1) Add 180 parts of silicone rubber emulsion, 50 parts of alkaline silica sol, 7 parts of binder, 1 part of dispersant, 8 parts of film-forming aid, and 2 parts of catalyst to 200 parts of dispersion medium, and stir at 400rpm Stir at a high speed for 15 minutes to obtain a mixed solution;

[0041] (2) Add 1 part of tetraethyl orthosilicate and 5 parts of silane coupling agent to 20 parts of ethanol aqueous solution (the weight ratio of absolute ethanol to distilled water is 9:1), and stir at 200 rpm for 5 minutes to obtain crosslinking agent;

[0042] (3) Add 25 parts of the cross-linking agent prepared in step (2) to the mixed solution prepared in step (1), and stir for 5 minutes at a stirring speed of 150 rpm to obtain a composite water-proof material;

[0043](4) Spray the composite waterproof material obtained in step (3) on the...

Embodiment 2

[0054] A method for preparing a water-resistant steel slag aggregate with strong adhesion to asphalt, comprising the following steps:

[0055] (1) Add 190 parts of silicone rubber emulsion, 55 parts of alkaline silica sol, 8 parts of binder, 1 part of dispersant, 10 parts of film-forming aid, and 2 parts of catalyst to 230 parts of dispersion medium, and stir at 450rpm Stir at a high speed for 18 minutes to obtain a mixed solution;

[0056] (2) Add 1 part of tetraethyl orthosilicate and 6 parts of silane coupling agent to 23 parts of ethanol aqueous solution (the weight ratio of absolute ethanol to distilled water is 12:1, stir at 230rpm for 8min, and you can get cross-linked joint agent;

[0057] (3) Add 28 parts of the cross-linking agent prepared in step (2) to the mixed solution prepared in step (1), and stir for 7 minutes at a stirring speed of 180 rpm to obtain a composite water-proof material;

[0058] (4) Spray the composite waterproof material obtained in step (3) o...

Embodiment 3

[0069] A method for preparing a water-resistant steel slag aggregate with strong adhesion to asphalt, comprising the following steps:

[0070] (1) Add 200 parts of silicone rubber emulsion, 60 parts of alkaline silica sol, 10 parts of binder, 2 parts of dispersant, 12 parts of film-forming aid, and 3 parts of catalyst into 260 parts of dispersion medium, and stir at 500rpm Stir at high speed for 20 minutes to obtain a mixed solution;

[0071] (2) Add 2 parts of tetraethyl orthosilicate and 8 parts of silane coupling agent into 26 parts of ethanol aqueous solution (the weight ratio of absolute ethanol to distilled water is 15:1, stir at 250rpm for 10min, you can get cross joint agent;

[0072] (3) Add 32 parts of the cross-linking agent prepared in step (2) to the mixed solution prepared in step (1), and stir at a stirring speed of 250 rpm for 8 minutes to obtain a composite water-proof material;

[0073] (4) Spray the composite waterproof material obtained in step (3) on the...

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Abstract

The invention discloses a water-proof steel slag aggregate with strong adhesion to asphalt and a preparation method thereof. The water-proof steel slag aggregate is a common converter steel slag whose surface is covered with a composite water-proof material. The water-proof steel slag material includes by weight: 180-220 parts of silicone rubber emulsion, 50-70 parts of alkaline silica sol, 7-12 parts of binder, 1-3 parts of dispersant, 8-14 parts of film-forming aid, 2-4 parts of catalyst, and 200 parts of dispersion medium ~300 parts, 25~38 parts of cross-linking agent; its preparation method first prepares the composite water-proof material, and then by spraying the composite water-proof material, utilizes the chemical bonding and curing reaction to form a high-strength water-proof film on the surface of the steel slag aggregate, and obtains Waterproof steel slag aggregate. The water-proof steel slag aggregate of the invention has low water absorption, high compressive strength, wear resistance and good adhesion with asphalt, and the preparation process is simple and efficient. The steel slag asphalt mixture prepared by substituting water-resistant steel slag aggregate for natural coarse aggregate has good water stability.

Description

technical field [0001] The invention relates to a water-proof steel slag aggregate with strong adhesion to asphalt and a preparation method thereof, belonging to the technical field of road engineering materials and the field of solid waste treatment. Background technique [0002] my country has become the country with the longest expressway mileage in the world, but the road network still needs to be continuously improved, and the task of road construction is still arduous. The large amount of highway construction requires the consumption of a large amount of high-quality natural aggregates, resulting in a shortage of natural aggregates, and excessive mining has seriously damaged the environment. Therefore, seeking alternative materials for high-quality natural aggregates is an important problem that needs to be solved urgently. On the other hand, my country's annual output of steel slag exceeds 100 million tons, but the comprehensive utilization rate of steel slag is only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/10C04B18/14C09D183/04C09D7/61C09D7/63C09D7/65
CPCC04B18/142C04B20/1044C08L2205/035C09D183/04C09D7/61C09D7/63C09D7/65C04B20/1029C04B20/1022C08L95/00C08L53/02C08K13/02C08K3/36C08K5/5415Y02W30/91
Inventor 王声乐江磊董从雷顾兴宇
Owner SOUTHEAST UNIV