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High-modulus asphalt modifier, high-modulus composite modified asphalt, asphalt mixture and preparation method thereof

A technology of composite modified asphalt and asphalt modifier, which is applied in the field of high modulus asphalt modifier, asphalt mixture and its preparation, and high modulus composite modified asphalt, which can solve the problem of crack resistance and oil consumption. Good balance, hard asphalt and other issues, to achieve the effect of maintaining physical and chemical stability, improving modulus and anti-rutting ability, and expanding market space

Inactive Publication Date: 2019-01-18
SHANGHAI RENJU NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low-grade asphalt is relatively hard, and it is still difficult to achieve a good balance in terms of crack resistance and oil consumption (cost)

Method used

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  • High-modulus asphalt modifier, high-modulus composite modified asphalt, asphalt mixture and preparation method thereof
  • High-modulus asphalt modifier, high-modulus composite modified asphalt, asphalt mixture and preparation method thereof

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preparation example Construction

[0070] [Preparation method of high modulus asphalt modifier]

[0071] A preparation method of high modulus composite asphalt modifier, it comprises the steps:

[0072] (1), the rubber tire powder is desulfurized and plasticized to obtain the desulfurized rubber tire powder;

[0073] (2) Mix 40-60 parts of desulfurized rubber tire powder, 30-60 parts of polyolefin plastic particles, 0-20 parts of petroleum resin or solid pitch and 0-6 parts of stabilizer, and then carry out compound reaction through twin-screw extruder , and then extrude and granulate through a single-screw extruder;

[0074] Wherein, in step (1), the desulfurization and plasticization can use normal pressure screw plasticizer, screw plasticizer, dynamic desulfurization tank and other rubber powder desulfurization and plasticization equipment, and the desulfurization and plasticization temperature is 160-260°C.

[0075] In step (2), the temperature of the twin-screw extruder for compound reaction is 140-240°C...

Embodiment 1

[0112] The present embodiment provides a kind of preparation method of asphalt mixture, it comprises the steps:

[0113] 1. Preparation of high modulus asphalt modifier:

[0114] (1), the rubber tire powder is desulfurized and plasticized to obtain the desulfurized rubber tire powder;

[0115] (2), 60 kilograms of devulcanized rubber tire powder (Mooney 110, particle diameter is 30 orders), 40 kilograms of low-density polyethylene plastic particles (6% dosage modified asphalt softening point>100 ℃, melt index is 1.1g / 10min), 2 kilograms of petroleum resin (103 DEG C of softening point) and 2.6 kilograms of stabilizers are mixed and reacted by a twin-screw extruder, and then pelletized by a single-screw extruder to obtain a high modulus asphalt modifier.

[0116] Wherein, the stabilizer comprises the following components: 0.8 kg of nylon toughening agent, 0.8 kg of castor oil, 0.6 catties of sodium petroleum sulfonate, 0.4 kg of styrene, and 0.5 kg of maleic anhydride.

[01...

Embodiment 2

[0128] In this embodiment, "low-density polyethylene plastic particles" in the first step (2) section in embodiment 1 is replaced by "polypropylene". The rest of the parameters remain unchanged.

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Abstract

The invention provides a high-modulus asphalt modifier, high-modulus composite modified asphalt, an asphalt mixture and a preparation method thereof. The high-modulus asphalt modifier is prepared from40 to 60 parts of desulfurized rubber tire powder, 30 to 60 parts of polyolefin plastic particles, 0 to 20 parts of petroleum resin or solid asphalt and 0 to 6 parts of a stabilizing agent. The high-modulus composite modified asphalt comprises 80 to 85 parts of matrix asphalt, 10 to 15 parts of the high-modulus asphalt modifier, 0 to 0.4 part of sulfur and 0 to 7 part of a light oil component. The asphalt mixture comprises 100 parts of mineral aggregate and 4.0 to 5.5 parts of the high-modulus composite modified asphalt. By adopting the high-modulus composite modified asphalt provided by theinvention, the problems that the compatibility of plastic and the asphalt is poor and the plastic is easy to separate and float from the asphalt are solved; and when an asphalt road surface is formedby the asphalt mixture, the modulus and anti-rutting capability of an asphalt structure layer can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of asphalt composite modification, and relates to a high modulus asphalt modifier, a high modulus composite modified asphalt, an asphalt mixture and a preparation method thereof. Background technique [0002] my country's large-scale use of modified asphalt began in the early 1990s when the road network was constructed. At that time, the total volume of transportation was growing rapidly driven by economic growth, and the overloading of freight was intensifying, resulting in a large number of newly built expressways. Serious road surface problems of high temperature instability and rainy season water damage. In the 1990s, the Capital Airport Expressway used plastic (PE) on-site modified asphalt imported from Austria, which opened the prelude to the large-scale use of modified asphalt. In subsequent applications, PE-modified asphalt has been recognized by the industry as having small deformation and strong anti-rutting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L17/00C08L23/06C08L23/12C08L57/02C08L91/00C04B26/26
CPCC04B26/26C08L95/00C08L2205/035C08L2207/062C08L17/00C08L23/06C08L23/12C08L57/02C08L91/00C04B14/048C04B14/28
Inventor 黄文元
Owner SHANGHAI RENJU NEW MATERIAL TECH
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