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Warm-mixed high-viscosity modified asphalt with low dissipation energy as well as preparation method and application thereof

A modified asphalt, warm-mixed and high-viscosity technology, which is applied to building insulation materials, building components, buildings, etc., can solve the problems of insufficient road performance, exhaust gas and dust emissions, and increased energy consumption, so as to reduce energy consumption The effect of reducing consumption, reducing internal heat, and reducing production costs

Active Publication Date: 2021-12-28
山东高速济南绕城西线公路有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixing temperature of asphalt and mineral materials in hot-mix high-viscosity asphalt mixture is between 180°C and 185°C. The aging of asphalt, exhaust gas and dust emissions, increased energy consumption and production costs caused by high-temperature mixing, transportation and paving Increases and more plague road workers
Although cold-mix asphalt mixture has the advantages of environmental protection and energy saving, its pavement performance is not enough to be used in bridge deck pavement, permeable pavement and other fields that require strict binders, and can only be used for maintenance of asphalt pavement, low traffic High-volume pavement and the lower layer of medium-heavy traffic pavement

Method used

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  • Warm-mixed high-viscosity modified asphalt with low dissipation energy as well as preparation method and application thereof
  • Warm-mixed high-viscosity modified asphalt with low dissipation energy as well as preparation method and application thereof
  • Warm-mixed high-viscosity modified asphalt with low dissipation energy as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 A low-dissipation energy warm-mix high-viscosity modified asphalt and its preparation method

[0035] (1) First, mix hydrogenated styrene-butadiene rubber HSBR and SBS at a ratio of 35%:65%, and grind the mixture to 30-50 mesh with a high-pressure mill to obtain elastomer particles A.

[0036](2) Carboxyl multi-walled carbon nanotubes, anti-stripping agent and plasticizer were mixed in a small mixer for 5 minutes at a ratio of 45%: 25%: 30%, and the rotating speed was 400r / min to obtain a WLST modifier;

[0037] The length of the carboxyl multi-walled carbon nanotubes does not exceed 1000nm, and the aspect ratio is greater than 100; the anti-stripping agent is acetamide tetraacetic acid disodium salt; the plasticizer is dioctyl phthalate .

[0038] (3) Mix and stir the blend of Span S-80, Span S-60 and Tween in the ratio of 25%: 30%: 45% in a beaker, and the temperature of the water bath is 75°C to obtain the LTSP warm mixing agent.

[0039] (4) Mix the elas...

Embodiment 2

[0045] Example 2 A low-dissipation energy warm-mix high-viscosity modified asphalt and its preparation method

[0046] (1) First, mix hydrogenated styrene-butadiene rubber HSBR and SBS at a ratio of 45%:55%, and grind the mixture to 30-50 mesh with a high-pressure mill to obtain elastomer particles A.

[0047] (2) Carboxyl multi-walled carbon nanotubes, anti-stripping agent and plasticizer were mixed in a small mixer for 8 minutes at a ratio of 55%: 20%: 25%, and the rotating speed was 600r / min to obtain a WLST modifier;

[0048] The length of the carboxyl multi-walled carbon nanotubes is not more than 1000nm, and the aspect ratio is greater than 100; the anti-stripping agent is acetamide tetraacetic acid disodium salt; the plasticizer is dioctyl terephthalate .

[0049] (3) Mix and stir the blend of Span S-80, Span S-60 and Tween in the ratio of 20%: 25%: 55% in a beaker, and the temperature of the water bath is 80°C to obtain the LTSP warm mixing agent.

[0050] (4) Mix el...

Embodiment 3

[0057] 1. Preparation process of low-dissipation energy warm-mix high-viscosity modified asphalt:

[0058] (1) First, mix hydrogenated styrene-butadiene rubber HSBR and SBS at a ratio of 55:45, and grind the mixture to 30-50 mesh with a high-pressure mill to obtain elastomer particles A.

[0059] (2) Carboxyl multi-walled carbon nanotubes, anti-stripping agent and plasticizer were mixed in a small mixer for 10 minutes at a ratio of 65%: 15%: 20%, and the rotating speed was 600r / min to obtain a WLST modifier;

[0060] The anti-peeling agent is tetrasodium acetamide tetraacetate; the plasticizer is dibutyl phthalate.

[0061] (3) Mix and stir the blend of Span S-80, Span S-60 and Tween in the ratio of 30%: 35%: 35% in a beaker, and the temperature of the water bath is 85°C to obtain the LTSP warm mixing agent.

[0062] (4) Mix the elastomer particle A with the WLST modifier and the organic polymer internal lubricant at a ratio of 52%: 14%: 34% in a high-speed shear mixing devic...

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Abstract

The invention relates to warm-mixed high-viscosity modified asphalt with low dissipation energy as well as a preparation method and application thereof. The modified asphalt is prepared from petroleum asphalt, a mixture of hydrogenated styrene-butadiene rubber HSBR and a thermoplastic elastomer SBS, a WLST modifier, an organic polymer internal lubricant, an LTSP warm mixing agent and a stabilizer. The preparation method comprises the steps of crushing hydrogenated butadiene styrene rubber into particles, mixing the particles with SBS, and then preparing finer elastomer particles A through a crusher; mixing the elastomer particles A, the WLST modifier and the organic polymer internal lubricant to prepare a low-energy-dissipation asphalt modifier; and heating petroleum asphalt in a reaction kettle, then adding the low-energy-dissipation asphalt modifier, grinding by a colloid mill, then adding the stabilizer, stirring and developing, finally adding the LTSP warm mixing agent, and continuously stirring and developing at a constant speed to prepare the warm-mixed high-viscosity modified asphalt with low dissipation energy. The rolling resistance of the road surface can be effectively reduced, and the purposes of energy conservation and emission reduction in the running process of the vehicle are achieved.

Description

technical field [0001] The invention relates to the field of building energy-saving materials (transportation engineering), in particular to a low-dissipation-energy warm-mixed high-viscosity modified asphalt and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of road engineering construction in my country, the traffic volume and traffic load have increased year by year, and the performance requirements for road pavement materials are getting higher and higher. High-viscosity modified asphalt is widely used in expressway, bridge deck pavement and some special projects because of its high viscosity and strong adhesion to aggregates. The mixing temperature of asphalt and mineral materials in hot-mix high-viscosity asphalt mixture is between 180°C and 185°C. The aging of asphalt, exhaust gas and dust emissions, increased energy consumption and production costs caused by high-temperature mixing, transportati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L15/00C08L53/02C08K3/04C08K5/17C08K5/12
CPCC08L95/00C08L2201/08C08K2201/011C08L15/00C08L53/02C08K3/041C08K5/175C08K5/12Y02A30/30
Inventor 路本升王鑫洋刘凯张保硕王扬王业飞张国扬史福泉宋振海
Owner 山东高速济南绕城西线公路有限公司
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