Abrasion-resistant recycled asphalt concrete and preparation process thereof

A technology for recycling asphalt and concrete, applied in the field of asphalt concrete processing, can solve the problems of easy occurrence of large wear and easy to appear aging, and achieve the effect of being conducive to waste disposal, overall quality improvement and good quality

Active Publication Date: 2019-05-03
上海宝新特种沥青混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the asphalt concrete pavement is prone to aging due to frequent temperature changes, resulting in greater wear and tear during use, the first purpose of the present invention is to provide a wear-resistant recycled asphalt concrete, which can improve the wear resistance of asphalt concrete. Grinding the thermal stability and anti-aging performance of recycled asphalt concrete to solve the above technical problems, it is not easy to age due to the intermittent frictional heat generated between it and the wheels, it is not easy to wear during use, and has good stability

Method used

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  • Abrasion-resistant recycled asphalt concrete and preparation process thereof
  • Abrasion-resistant recycled asphalt concrete and preparation process thereof
  • Abrasion-resistant recycled asphalt concrete and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Example 1: A wear-resistant recycled asphalt concrete, the components and their corresponding parts by weight are shown in Table 1, and were prepared through the following steps:

[0047] Step 1: Stir and dry new aggregates, polyester fibers, glass beads and steel slag in corresponding parts by weight in a drying barrel. The temperature is controlled at 110°C, the time is 30min, and the stirring speed is 1200rpm to obtain dried Mixture;

[0048] Step 2, put the dry mixture into the mixing tank, heat 60% by weight of SBS modified asphalt to 180°C, add it into the mixing tank evenly within 30s, and stir at a stirring speed of 1500rpm;

[0049] Step 3: Preheat the regenerated asphalt mixed old material to 150°C and add it together with the regeneration agent into the above mixing tank. The temperature in the mixing tank is maintained at 170°C and stirring is carried out at a stirring speed of 900rpm for 30 minutes. Then add the remaining 40% by weight of SBS modified asph...

Embodiment 2-8

[0052] Example 2-8: A wear-resistant recycled asphalt concrete, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0053] Each component and parts by weight thereof in table 1 embodiment 1-8

[0054]

[0055]

Embodiment 9

[0056] Example 9: A wear-resistant recycled asphalt concrete, the difference from Example 1 is that the new aggregate is composed of limestone with a particle size range of 0-3mm, 3-5mm and a ratio of 1.1:1 by weight and The particle size range is 5-10mm, 10-16mm, and the weight ratio of 1:0.4 is composed of basalt, and the weight ratio of limestone and basalt is 1.1:1.

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Abstract

The invention discloses an abrasion-resistant recycled asphalt concrete and a preparation process thereof, relates to the technical field of asphalt concrete processing, and solves the problem that asphalt concrete pavement is prone to ageing due to frequent temperature changes and is prone to large abrasion during use. The abrasion-resistant recycled asphalt concrete comprises the following components in parts by weight: 75 to 80 parts of new aggregate, 5 to 8 parts of SBS modified asphalt, 0.5 to 0.7 part of mineral powder, 20 to 35 parts of a recycled asphalt mix old material, 0.2 to 0.4 part of a regenerating agent, 6 to 10 parts of steel slag, 0.4 to 0.8 part of hydrated lime powder, 1.8 to 2.6 parts of fiber filler, 0.5 to 1.5 part of abrasion-resistant filler, 0.4 to 0.8 part of carbon black, 4.5 to 7.5 parts of sericite particles. The abrasion-resistant recycled asphalt concrete in the invention has good stability in the use process, is not easy to age due to intermittent friction heat generated between the abrasion-resistant recycled asphalt concrete and a wheel, and is not easy to greatly wear.

Description

technical field [0001] The invention relates to the technical field of asphalt concrete processing, and more specifically relates to a wear-resistant recycled asphalt concrete and a preparation process thereof. Background technique [0002] Asphalt concrete, commonly known as asphalt concrete, is artificially selected with a certain gradation composition of mineral materials, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, mixed under strictly controlled conditions made mixture. [0003] In the Chinese invention patent with the publication number CN105948598A, a kind of asphalt concrete is disclosed, especially a kind of asphalt concrete. 10-15 parts of finely crushed ore, 7-15 parts of functional mineral powder, 5-10 parts of fly ash, 5-8 parts of imitation steel fiber, 2-10 parts of halloysite, and 2.8-6.4 parts of silicon carbide micropowder. The modified asphalt is selected from at least on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 胡俊伟
Owner 上海宝新特种沥青混凝土有限公司
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