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Industrialized heat regeneration asphalt mixture and preparation method thereof

A technology of asphalt mixture and old asphalt mixture, which is applied in the direction of building insulation materials, buildings, building components, etc., can solve the problems of large amount of regenerated agent, large amount of new asphalt added, and high cost, so as to save asphalt and gravel materials, save engineering investment, and reduce costs

Active Publication Date: 2008-02-13
SHANGHAI HIGHWAY BRIDGE (GRP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wherein the use amount of regenerated agent in this recycled asphalt concrete is relatively large, and the addition amount of new asphalt is also large, is 5-7% (w / w), and cost is higher; Crushing and screening; while the processing method adopts continuous double-drum recycled asphalt mixer mixing; more importantly, the performance indicators of the recycled asphalt concrete that are not disclosed in this document are obtained according to the disclosed content. Final product quality is questionable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative Embodiment A

[0031] Embodiment 1~3 and comparative example AC-25 recycled asphalt mixture

[0032]formula:

[0033] components

Example 1

Example 2

Example 3

comparative example

new aggregate

0~5mm

22.83

13.81

11.3

34.5

5~25mm

43.5

43.0

36

58.4

mineral powder

1

1

1

2.9

old asphalt

Mixture

0~15mm

13

24.5

30

0

15~25mm

17

15.5

20

0

new asphalt binder

2.44

1.89

1.33

4.2

Regenerant

0.23

0.30

0.37

0

[0034] The preparation method is:

[0035] It is equipped with intermittent forced mixing equipment with downstream drying drum from AMMANN, Germany.

[0036] ① Heat the old asphalt mixture to 80-100°C in the downstream drying drum, and heat the new aggregate to 190-210°C in the hot drying drum;

[0037] ②Put the old asphalt mixture, new a...

Embodiment 4～5

[0040] Embodiment 4~5AC-25 type recycled asphalt mixture

[0041] formula:

[0042] components

[0043] The preparation method is the same as in Example 1-3.

Embodiment 6～7

[0045] formula:

[0046] components

Example 6

Example 7

AC-20

AC-25

new aggregate

0~5mm

25.5

20.04

5~25mm

40.14

46

mineral powder

1.5

1.5

old asphalt mixture

0~15mm

20

20

15~25mm

10

10

new asphalt binder

2.86

2.46

Regenerant

0

0

[0047] The preparation method is the same as in Example 1-3, wherein no regenerant is added in step ③.

[0048] The percentages in the above examples are all percentages by weight.

[0049] The origin of the materials is:

[0050] New aggregate: fine material (0-3mm, 0-5mm) in Yixing, Jiangsu, and Huzhou, Zhejiang; coarse material (3-5mm, 5-10mm, 5-15mm, 10-20mm, 10-25mm, 15-25mm) Jiangsu Yixing, Zhejiang Huzhou, Anhui Hexian, Nanjing Maodi;

[0051] Mineral powder: Yixing, Jiangsu;

[0052] New asphalt: Taizhou Donghua 70# asphalt, Korea SK70# asphalt, Sinopec Zhenhai 70# ...

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Abstract

The invention discloses a factory hot recycled asphalt mixture, which comprises the following components in weight percentage: 44-92% of new aggregate, 1-3% of mineral powder, 5-50% of old asphalt mixture and 1.7-3.0% new asphalt binder, wherein the weight ratio of fine material with a particle size of 0-15mm to coarse material with a particle size of 15-25mm in the old asphalt mixture is 0.5-2:1. The invention also discloses its preparation method. The industrial heat-regenerated asphalt mixture of the present invention can save a large amount of asphalt and gravel materials without regenerating agent, save engineering investment, turn waste into treasure, and save energy; In terms of water damage performance, it is not inferior to the fresh asphalt mixture; in addition, the preparation method of the invention can effectively reduce the smoke phenomenon caused by the old material when heated, reduce the pollution to the environment, and has a good environmental protection effect.

Description

technical field [0001] The invention relates to a heat-regenerated asphalt mixture, in particular to a factory heat-regenerated asphalt mixture and a preparation method thereof. Background technique [0002] With the advancement of municipal construction, new issues have been proposed for road use functions and driving quality, road construction environmental protection, and comprehensive recycling of road materials. In large-scale road construction and road renovation, a large amount of old materials such as concrete and other materials have polluted the environment, and stacking and processing are also quite difficult, and the stacking and transportation of waste materials will cost a lot of money. In order to turn waste into treasure, save energy and protect the environment, all countries pay attention to recycling and reusing the old asphalt concrete (mixture) fragments, crushing and screening them, and then properly matching them with new mineral materials, asphalt and ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K3/34
Inventor 俞国平曹亚东严军曹祖光蔡明柴平徐鸣韩勇强张萍
Owner SHANGHAI HIGHWAY BRIDGE (GRP) CO LTD
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