Foamed asphalt warm-mixing mixture and preparation method thereof

A technology of foamed asphalt and mixture, applied in the field of asphalt mixture, which can solve the problems of high cost, easy dispersion of dust, dust and sand, environmental pollution, etc., and achieve the effects of protecting the environment, improving the construction operation environment, and reducing energy consumption

Active Publication Date: 2020-11-20
THE 5TH CONSTR COMPANY LTD OF CHINA RAILWAY 15TH BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the construction industry will generate a large amount of construction waste. Most of the construction waste is directly transported to the suburbs without treatment and is disposed of in open-air stacking or landfill. Dust and gray sand are easy to be scattered and cause serious environmental pollution

Method used

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  • Foamed asphalt warm-mixing mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A preparation method for foamed asphalt warm mixture, comprising the following steps:

[0059] a. Heat 10kg of Buton Rock asphalt to 140°C, add 0.08kg of water containing 0.1kg of ethylene-vinyl acetate copolymer and 0.5kg of polyester fiber, and control the temperature of the water at 50°C to obtain foamed asphalt;

[0060] b. Heat 100kg of waste cement concrete recycled aggregate and 800kg of old asphalt pavement materials to 95°C and keep them warm for 5 hours, then mix them, and mix them at 95°C for 90s; then add the foamed asphalt prepared in step a at 140°C, and mix them at 140°C for 40s; Finally, add 20kg of ore powder preheated to 95°C and stir at 95°C for 90s to obtain the asphalt mixture.

[0061] Among the waste cement concrete regenerated aggregates and old asphalt pavement materials, aggregates with a nominal particle size of 0-2.36 mm, 0.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm, 16-19 mm, and 19-26.5 mm The weight ratio of materials is 18:24:14:16:4:5.

Embodiment 2

[0063] A preparation method for foamed asphalt warm mixture, comprising the following steps:

[0064] a. Heat 60kg of Buton rock asphalt to 160°C, add 0.9kg of water containing 0.5kg of styrene-butadiene latex and 0.1kg of glass fiber, and control the temperature of the water at 30°C to obtain foamed asphalt;

[0065] b. Heat 400kg of waste cement concrete recycled aggregate and 200kg of old asphalt pavement materials to 130°C and keep them warm for 3 hours, then mix them, and mix them at 130°C for 40s; then add the foamed asphalt prepared in step a at 130°C, and mix them at 130°C for 90s; Finally, add 200kg of ore powder preheated to 130°C, and stir at 130°C for 40 seconds to obtain the asphalt mixture.

[0066] Among the waste cement concrete regenerated aggregates and old asphalt pavement materials, aggregates with a nominal particle size of 0-2.36 mm, 0.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm, 16-19 mm, and 19-26.5 mm The weight ratio of materials is 25:17:19:10:10:1.

Embodiment 3

[0068] A preparation method for foamed asphalt warm mixture, comprising the following steps:

[0069] a. Heat 20kg of Butonite asphalt to 145°C, add 0.18kg of water containing 0.2kg of cocoyl glycinate potassium and 0.4kg of wood fiber, and control the temperature of the water at 35°C to obtain foamed asphalt;

[0070] b. Heat 150kg of waste cement concrete regenerated aggregate and 700kg of old asphalt pavement materials to 100°C and keep them warm for 3.5 hours, then mix them, and mix them at 100°C for 80s; then add the foamed asphalt prepared in step a at 132°C, and mix them at 132°C for 65s ; Finally, add 150kg of ore powder preheated to 100°C, and stir at 100°C for 80s to obtain the asphalt mixture.

[0071] Among the waste cement concrete regenerated aggregates and old asphalt pavement materials, aggregates with a nominal particle size of 0-2.36 mm, 0.36-4.75 mm, 4.75-9.5 mm, 9.5-16 mm, 16-19 mm, and 19-26.5 mm The weight ratio of materials is 20:22:16:14:6:4.

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Abstract

The invention discloses a foamed asphalt warm-mixing mixture and a preparation method thereof, and belongs to the field of asphalt mixtures. The preparation method comprises the following steps: heating 1-6 parts of matrix asphalt to 140-160 DEG C, and adding water which is 0.8-1.5% of the mass of the asphalt and contains a foaming agent and a stabilizer to obtain foamed asphalt; b, mixing 10-40 parts of waste cement concrete recycled aggregate and 20-80 parts of an old asphalt pavement material and stirring for 40-90 s at the temperature of 95-130 DEG C; then adding the foamed asphalt, and stirring for 40 to 90s at 130 to 140 DEG C; and finally, adding 2-20 parts of mineral powder, and mixing for 40-90 s at the temperature of 95-130 DEG C. According to the invention, the discharge amountof harmful gas and dust can be greatly reduced, the energy consumption in the production process can be reduced, the aging of the asphalt cement in the production process can be reduced, and the pavement performance of the mixture can be improved.

Description

technical field [0001] The application relates to the field of asphalt mixture, in particular to a foamed asphalt warm mix and a preparation method thereof. Background technique [0002] At present, more than 90% of the road construction in the world adopts asphalt pavement paved with asphalt mixture. According to the manufacturing process, asphalt mixture can be divided into two types: hot mix asphalt mixture and cold mix asphalt mixture. Hot mix asphalt mixture has good road performance, but it consumes a lot of fuel during production and construction, and emits a lot of harmful gases and dust, which seriously pollutes the environment and poses a health hazard to construction workers. The cold mix asphalt mixture has the advantages of environmental protection and energy saving because it does not need to be heated, but its road performance is not high, and it is difficult to compare with the hot mix asphalt mixture. Therefore, the introduction of asphalt warm mixing tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/16
CPCC04B26/26C04B18/16C04B2201/50C04B2111/0075C04B18/12C04B24/2623C04B24/2676C04B24/123C04B24/42C04B14/42C04B16/0683C04B16/02Y02W30/91
Inventor 吴鸿胜张永昌陈竞尧杨站辉苏兴矩孙峰伟王孝荣
Owner THE 5TH CONSTR COMPANY LTD OF CHINA RAILWAY 15TH BUREAU GRP
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