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High modulus modified asphalt and preparation method

A modified asphalt, high-modulus technology, applied in building components, building insulation materials, buildings, etc., can solve the problem that high-temperature performance cannot meet the needs of roads in high-temperature areas, cannot achieve high-modulus modified asphalt performance, and increase the difficulty of preparation. and other problems, to achieve the effect of simplifying time and equipment costs, improving high temperature resistance, and improving tensile strength

Active Publication Date: 2013-05-15
GUANGDONG SILVER AGE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, polyethylene-modified asphalt can only be produced at the construction site, and it is ready-to-use. The site requires high equipment requirements, which increases the difficulty of preparation, and the preparation time is long, which affects the progress of the project.
[0004] Chinese patent application number: 201010256820.9, a composite asphalt modified high modulus agent and its preparation and application method, the composite asphalt modified high modulus agent includes A component and B component, where A component is recycled PE 70-90%, magnesium hydroxide 0.1-8%, modifier 0.5-15%, binder resin 0.5-12%, the softening point of the asphalt prepared is between 60-70 ℃, which cannot achieve high modulus The properties of quantitatively modified asphalt
No. 90 asphalt is used as the base asphalt to ensure its low-temperature performance, but the softening point of the obtained asphalt is poor, and the high-temperature performance cannot meet the road requirements in high-temperature areas

Method used

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  • High modulus modified asphalt and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step a: 34% polyethylene A, 52% polyethylene B, 7% ethylene terpolymer, 1% ethylene bis stearamide, 5% waste motor oil, 0.2% tris[2.4-di-tert-butylbenzene base] phosphite, 0.2% tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and the rest of the toner were put into the powder tank in sequence for uniform stirring, and the stirring time 2~10min, the stirring speed is 600r / min.

[0052] Step b: Extrude and granulate the uniformly stirred material in step a with a twin-screw extruder, the extrusion temperature is 150~200°C, the vacuum degree during extrusion granulation is -0.08~-0.04MPa, the screw speed is It is 350r / min.

[0053] Step c: The materials prepared in the above step b are sequentially cooled by immersion in water, shaken by a water pump, pelletized by a pelletizer, and mixed by a mixing bucket, so that the physical properties of the product are uniform and the finished product is put into storage.

Embodiment 2

[0055] Step a: 82% polyethylene B, 10% ethylene terpolymer, 1% ethylene bis stearamide, 6% aromatic oil, 0.1% tris[2.4-di-tert-butylphenyl] phosphite, Put 0.2% tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and the rest of the toner into the powder tank in turn and stir evenly. The stirring time is 2~10min. The speed is 800r / min.

[0056] Step b: Extrude and granulate the uniformly stirred material in step a with a twin-screw extruder, the extrusion temperature is 150~200°C, the vacuum degree during extrusion granulation is -0.08~-0.04MPa, the screw speed is 400r / min.

[0057] Step c: The materials prepared in the above step b are sequentially cooled by immersion in water, shaken by a water pump, pelletized by a pelletizer, and mixed by a mixing bucket, so that the physical properties of the product are uniform and the finished product is put into storage.

Embodiment 3

[0059] Step a: 82% polyethylene A, 9% ester copolymer, 1% ethylene bis stearamide, 7% mixture of waste engine oil and aromatic oil with a mass ratio of 1:1, 0.2% tri[2.4-ditert-tert Butylphenyl] phosphite, 0.2% tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and the rest of the toner were put into the powder tank in sequence for uniform stirring , the stirring time is 2~10min, and the stirring speed is 800r / min.

[0060] Step b: Extrude and granulate the uniformly stirred material in step a with a twin-screw extruder, the extrusion temperature is 150~200°C, the vacuum degree during extrusion granulation is -0.08~-0.04MPa, the screw speed is It is 450r / min.

[0061] Step c: The materials prepared in the above step b are sequentially cooled by immersion in water, shaken by a water pump, pelletized by a pelletizer, and mixed by a mixing bucket, so that the physical properties of the product are uniform and the finished product is put into storag...

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Abstract

The invention belongs to the modified asphalt technical field, and particularly relates to a high modulus modified asphalt and a preparation method. The high modulus modified asphalt comprises the following raw materials by weight: 90-95% of asphalt, 4-4.5 parts of styrene-pyrrolylene-styrene triblock copolymer and 3-3.5 parts of high modulus asphalt modifier. The high modulus modified asphalt has the advantages of low preparation method, high temperature resistance and strong deformation resistance, and the preparation method is simple and easy to be carried out, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, in particular to a high modulus modified asphalt and a preparation method thereof. Background technique [0002] As a rheological material with viscoelasticity and plasticity, asphalt tends to soften at high temperature to become fluid, and to harden and become brittle at low temperature to become solid. The road surface requires that the asphalt used is not easy to soften and produce ruts at high temperature, and is not easy to become hard and brittle at low temperature. However, it is difficult for general asphalt to meet this contradictory and mutually restrictive requirement. Therefore, asphalt must be modified to obtain asphalt binders that meet different requirements. [0003] SBS, also known as styrene-butadiene-styrene triblock copolymer, is a thermoplastic elastomer material. Modification of asphalt with SBS is the most commonly used modification method at present, but the supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L23/06C08K5/20C08K5/01B29C47/92B29B9/06B29C48/92
CPCB29C48/40B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 傅轶王海民毕齐兵郑怀宇招启强谭颂斌
Owner GUANGDONG SILVER AGE SCI & TECH CO LTD
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