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Recycled asphalt concrete and preparation method thereof

A technology for recycling asphalt and concrete, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as poor service life, and achieve the effect of increasing service life, improving structural strength, and improving mechanical properties

Inactive Publication Date: 2021-11-19
浙江建瓴新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the defect of poor service life of existing recycled asphalt concrete materials, the present invention provides a recycled asphalt concrete and its preparation method, adopting the following technical scheme:

Method used

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  • Recycled asphalt concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0051] A recycled coarse aggregate:

[0052] (1) Stir and mix 1kg trimethyltrioxysilane, 3kg ethyl orthosilicate, 6kg ethyl titanate and 10kg ethyl acetate, and collect the mixed slurry;

[0053] (2) Mix 1kg of mixed slurry, 6kg of trifluoroacetic acid solution and 12kg of polyvinyl butyral ester evenly, and collect the mixed solution;

[0054] (3) Spray 1kg of mixed solvent solution onto the surface of 15kg of recycled coarse aggregate substrate, control the spraying temperature at -15°C, heat up to 55°C, cool naturally to room temperature under 3MPa and let it stand for 24h to prepare The recycled coarse aggregate 1.

preparation example 2

[0056] A recycled coarse aggregate:

[0057] (1) Stir and mix 1kg trimethyltrioxysilane, 4kg ethyl orthosilicate, 7kg ethyl titanate and 10kg ethyl acetate, and collect the mixed slurry;

[0058] (2) Mix 1kg of mixed slurry, 6kg of trifluoroacetic acid solution and 13kg of polyvinyl butyral ester evenly, and collect the mixed solution;

[0059] (3) Spray 1kg of mixed solvent solution onto the surface of 15kg of recycled coarse aggregate substrate, control the spraying temperature at -12°C, heat up to 58°C, cool naturally to room temperature under 4MPa and let it stand for 26h to prepare The recycled coarse aggregate 2.

preparation example 3

[0061] A recycled coarse aggregate:

[0062] (1) Stir and mix 1kg trimethyltrioxysilane, 5kg ethyl orthosilicate, 8kg ethyl titanate and 10kg ethyl acetate, and collect the mixed slurry;

[0063] (2) Mix 1kg of mixed slurry, 6kg of trifluoroacetic acid solution and 15kg of polyvinyl butyral ester evenly, and collect the mixed solution;

[0064] (3) Spray 1kg of mixed solvent solution onto the surface of 15kg of recycled coarse aggregate substrate, control the spraying temperature at -10°C, heat up to 60°C, cool naturally to room temperature under 5MPa and let it stand for 30h to prepare The recycled coarse aggregate 3.

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Abstract

The invention relates to the technical field of recycled concrete, and particularly discloses recycled asphalt concrete which comprises the following substances in parts by weight: 3-10 parts of mineral powder, 1-5 parts of fly ash, 35-150 parts of recycled coarse aggregate, 45-150 parts of recycled fine aggregate and 10-30 parts of modified recycled asphalt, the recycled coarse aggregate comprises a recycled coarse aggregate matrix and an aerogel coating film. The preparation method of the recycled asphalt concrete comprises the following preparation steps: S1, premixing treatment; s2, melting the asphalt; and S3, mixing and stirring. The recycled coarse aggregate is subjected to coating treatment, the surface structure of the recycled coarse aggregate is improved through coating treatment, and the mechanical strength and mechanical performance of the recycled coarse aggregate material are improved, so that a good load filling effect can be formed after the recycled coarse aggregate material is added into the recycled asphalt concrete; the service life of the recycled asphalt concrete material is further optimized.

Description

technical field [0001] The invention belongs to the technical field of recycled concrete, and in particular relates to recycled asphalt concrete and a preparation method thereof. Background technique [0002] Aging of asphalt refers to physical properties such as reduced ductility, increased softening point, increased viscosity, and oxidation of asphalt under the combined effects of external factors such as sunlight, water, and air oxidation during storage, transportation, and construction. and changes in chemical properties. After the pavement is completed, the asphalt will age slowly under natural conditions. As the aging of asphalt is mainly an irreversible chemical change, it is easy to cause asphalt to harden and become brittle, losing its proper physical properties, thereby affecting road performance, coupled with the effects of water and vehicle loads, it will aggravate road surface diseases. [0003] Recycled asphalt pavement materials refer to asphalt mixture reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/10C04B18/16
CPCC04B26/26C04B20/1055C04B18/16C04B2201/50C04B18/141C04B18/08Y02W30/91
Inventor 张连明许武文
Owner 浙江建瓴新材料有限公司