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A kind of high-performance composite modified asphalt and its preparation method

A composite modified asphalt, high-performance technology, applied in the direction of building components, building insulation materials, buildings, etc., can solve the three major indicators of modified asphalt performance attenuation, easy to agglomerate, modified asphalt and low temperature performance can not meet the road technology Requirements and other issues, to achieve the effect of high temperature performance improvement, short processing time and low processing temperature

Active Publication Date: 2022-02-18
云南云天化以化磷业研究技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of modified asphalt, these additives are difficult to disperse evenly in asphalt, and are easy to agglomerate, and there will be layering and segregation between the modifier and asphalt during transportation and storage, resulting in rapid attenuation of the performance of modified asphalt. The three major indicators and low-temperature performance of modified asphalt cannot meet road technical requirements

Method used

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  • A kind of high-performance composite modified asphalt and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw materials used were weighed according to the following weights: 82 parts of base asphalt, 1.5 parts of polyphosphoric acid, 3 parts of recycled polyethylene wax, 2 parts of rock asphalt, 1.5 parts of calcium carbonate, 8 parts of powdered styrene-butadiene rubber, and 2 parts of extracted oil.

[0030] The modified asphalt was prepared by the following steps: 1) The preparation method of component A: heat and melt the base asphalt at 160°C, add polyphosphoric acid and stir for 30min at 250r / min to complete the chemical modification. 2) The preparation method of component B: add recycled polyethylene wax, rock asphalt, filler, rubber, extracted oil, etc. into the twin-screw extruder according to a certain formula, and mix, heat, shear, shape, The pelletizing process prepares composite modifier pellets. 3) Add component B to component A at 160°C and stir for 4 hours at 250r / min to obtain the high-performance composite modified asphalt.

[0031] The technical indi...

Embodiment 2

[0033] The raw materials used were weighed according to the following weights: 86.5 parts of base asphalt, 0.5 parts of polyphosphoric acid, 3 parts of regenerated polyethylene wax, 3 parts of rock asphalt, 2 parts of carbon black, 1 part of natural rubber, and 4 parts of extracted oil.

[0034] The modified asphalt was prepared by the following steps: 1) The preparation method of component A: heat and melt the base asphalt at 130°C, add polyphosphoric acid and stir for 1 hour at 200r / min to complete the chemical modification. 2) The preparation method of component B: add recycled polyethylene wax, rock asphalt, filler, rubber, extracted oil, etc. into the twin-screw extruder according to a certain formula, and mix, heat, shear, shape, The pelletizing process prepares composite modifier pellets. 3) Add component B to component A at 130°C and stir for 2 hours at 200r / min to obtain the high-performance composite modified asphalt.

[0035] The technical indicators of the prepared ...

Embodiment 3

[0037] The raw materials used were weighed according to the following weights: 80 parts of base asphalt, 1.5 parts of polyphosphoric acid, 10 parts of regenerated polyethylene wax, 1 part of rock asphalt, 4 parts of carbon black, 2 parts of neoprene rubber, and 1.5 parts of extracted oil.

[0038] The modified asphalt was prepared by the following steps: 1) The preparation method of component A: heat and melt the base asphalt at 165°C, add polyphosphoric acid and stir for 20min at 250r / min to complete the chemical modification. 2) The preparation method of component B: add recycled polyethylene wax, rock asphalt, filler, rubber, extracted oil, etc. into the twin-screw extruder according to a certain formula, and mix, heat, shear, shape, The pelletizing process prepares composite modifier pellets. 3) Add component B to component A at 165°C and stir for 3 hours at 250r / min to obtain the high-performance composite modified asphalt.

[0039] The technical indicators of the prepar...

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Abstract

The invention belongs to the technical field of road engineering materials and environmental protection, and relates to a high-performance composite modified asphalt and a preparation method thereof. The composite modified asphalt consists of 80-95 parts by weight of component A and 5-20 parts of component B, wherein component A consists of 79.8-94.8 parts by weight of base asphalt and 0.2-2.5 parts of polyphosphoric acid; It consists of 1-10 parts by weight of regenerated polyethylene wax, 0-8 parts of rock asphalt, 0.1-5 parts of filler, 0.5-8 parts of rubber, and 0-5 parts of extracted oil. The method of the present invention prepares component A and component B respectively, then adds component B to the chemically modified component A, and fully stirs to obtain the high-performance composite modified asphalt. The invention has simple processing technology, low processing temperature and short processing time, and can be produced in any mixing station. At the same time, the high-temperature performance reaches or even exceeds the index of adding anti-rutting agent, and the low-temperature performance reaches or even exceeds the SBS modified asphalt.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials and environmental protection, and relates to a high-performance composite modified asphalt and a preparation method thereof. Background technique [0002] Petroleum asphalt is widely used in various fields such as transportation, construction, and industry. Petroleum asphalt has defects such as easy softening at high temperature, brittle cracking at low temperature, aging resistance, and fatigue resistance. Therefore, adding a modifier It is a very effective way to improve the performance of asphalt. [0003] At present, the commonly used asphalt modifier is SBS, but the amount of SBS must reach a certain level to have a good modification effect, thus requiring a large amount of addition, resulting in high cost of SBS modified asphalt. Secondly, SBS has high requirements on equipment and modification process, and the patented technology of its core equipment colloid mill is mon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L23/06C08L9/06C08L7/00C08L11/00C08L19/00C08K3/32C08K3/04C08K3/26
Inventor 李德高白丛启马航张桂铭周艳李宁王燕王绍飞杨东赵洲亲李晓龙潘兴东马俊
Owner 云南云天化以化磷业研究技术有限公司
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