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Warm-mixing regenerated asphalt and preparation method thereof

A technology of recycled asphalt and warm mix regenerant, which is applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of high mixing temperature, impact on road performance, low regeneration ratio, etc. The effect of increased utilization

Inactive Publication Date: 2014-12-10
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The warm-mix recycled asphalt mixture of this invention uses sulfur as an additive. Although the price is low, the mixing temperature is still high, which will lead to serious secondary aging, low regeneration ratio, and affect road performance.

Method used

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  • Warm-mixing regenerated asphalt and preparation method thereof
  • Warm-mixing regenerated asphalt and preparation method thereof
  • Warm-mixing regenerated asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] A warm-mix regenerated asphalt is prepared by mixing asphalt and a composite warm-mix regenerant. The asphalt is new asphalt. The quality of asphalt binder is 10000g, wherein the content of new asphalt is 70%, namely 7000g, and the content of aged asphalt is 30%, namely 3000g. Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is fatty acid glyceride, which is a yellow, transparent, liquid substance at room temperature; the oil regeneration agent is the extracted oil from refined lubricating oil, which is a dark yellow, viscous liquid substance at room temperature.

[0070] The preparation of the above-mentioned composite warm mixing regenerant comprises the following steps:

[0071] (1) Take fatty acid glyceride and the extracted oil when refining lubricating oil according to a certain ratio.

[0072] The amount of fatty acid glyceride added is 0.5% of the mass of asphalt binder, that is, P 脂肪酸甘油酯 =(P 1 +P 2 ) × A...

Embodiment 2

[0080] A warm-mix regenerated asphalt is prepared by mixing asphalt and a composite warm-mix regenerant. The asphalt is new asphalt. The quality of asphalt binder is 10000g, wherein the content of new asphalt is 60%, that is 6000g, and the content of aged asphalt is 40%, that is 4000g. Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is sorbitan fatty acid, which is a yellow, transparent, liquid substance at room temperature; the oil regeneration agent is heavy oil, which is a dark yellow, viscous liquid substance at room temperature.

[0081] The preparation of the above-mentioned composite warm mixing regenerant comprises the following steps:

[0082] (1) Sorbitan fatty acid and heavy oil are weighed according to a certain ratio.

[0083] The amount of fatty acid sorbitan added is 0.6% of the mass of asphalt binder, that is, P 脂肪酸山梨坦 =(P 1 +P 2 ) × A = 10000 × 0.6% = 60g; when the aged asphalt is regenerated to asphal...

Embodiment 3

[0091]A warm-mix regenerated asphalt is prepared by mixing asphalt and a composite warm-mix regenerant. The asphalt is new asphalt. The quality of asphalt binder is 10000g, wherein the content of new asphalt is 80%, that is 8000g, and the content of aged asphalt is 20%, that is 2000g. Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is polysorbate, which is a yellow, transparent, liquid substance at room temperature; the oil regeneration agent is lubricating oil, which is a dark yellow, viscous liquid substance at room temperature.

[0092] The preparation of the above-mentioned composite warm mixing regenerant comprises the following steps:

[0093] (1) Take polysorbate and lubricating oil according to a certain ratio.

[0094] The amount of polysorbate added is 0.3% of the mass of asphalt binder, that is, P 聚山梨酯 =(P 1 +P 2 ) × A = 10000 × 0.3% = 30g; the experiment shows that when the aged asphalt is regenerated to as...

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Abstract

The invention discloses a warm-mixing regenerated asphalt which is mixed from asphalt and a composite warm-mixing regenerant, wherein the composite warm-mixing regenerant is a surfactant-oil regenerant composite material. The warm-mixing regenerated asphalt has the advantages of favorable function effect, no pollution and low cost. The composite warm-mixing regenerant organically combines the warm-mixing agent with the regenerant to fully display the overall functions. The invention also discloses a preparation method of the warm-mixing regenerated asphalt, which comprises the following steps: heating the asphalt to mixing temperature; and adding the composite warm-mixing regenerant to the asphalt, and mixing. The preparation method is simple, and is implemented by directly adding the composite warm-mixing regenerant into the asphalt at one time and uniformly mixing; the mixing temperature is obviously lowered, thereby reducing the discharge of the harmful gas and lowering the cost; and the warm-mixing regenerated asphalt has favorable pavement performance.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and relates to warm mixing technology and regeneration technology of pavement asphalt, in particular to warm mixing regenerated asphalt and a preparation method thereof. Background technique [0002] In recent years, the warm mixing technology and recycling technology of asphalt and asphalt mixture, as a new technology for asphalt pavement construction, has been paid more and more attention by people. [0003] The regeneration technology of asphalt pavement is to re-mix the old asphalt pavement with new asphalt pavement materials in a certain proportion after the pretreatment process of milling, recycling and screening, so that it can meet certain requirements. Excellent road performance and use it to re-pave the road surface technology. The traditional asphalt pavement regeneration technology is mainly heat-recycled asphalt mixture technology. The heat-regenerated asphalt mix...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/00C08K5/103C08K5/01
CPCY02A30/30
Inventor 徐世法索智金珊珊乐兴堃
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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