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Preparation method of high-performance stable PPA and SBS composite modified asphalt

A composite modified asphalt, stabilized technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of limited performance improvement and inability to meet the needs of use, so as to improve temperature sensing performance, increase softening point, and reduce high temperature Effect of Viscosity and High Temperature Properties

Inactive Publication Date: 2021-04-13
THE THIRD ENG CO LTD OF CHINA RAILWAY SEVENTH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing modified asphalt generally adopts a single SBS modified asphalt, although it can improve the high temperature, low temperature and stability performance to a certain extent, but there are still some deficiencies, the performance improvement is limited, and it is increasingly unable to meet higher use requirements

Method used

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  • Preparation method of high-performance stable PPA and SBS composite modified asphalt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the embodiment of the present invention, a high-performance stable PPA and SBS composite modified asphalt preparation method, the steps are as follows:

[0028] Prepare the following raw materials in parts by weight: 60 parts of base asphalt, 40 parts of natural asphalt, 30 parts of vegetable asphalt, 50 parts of waste tire rubber powder, 20 parts of thermoplastic elastomer, 10 parts of modified calcium carbonate, and 6 parts of modified sulfur , 10 parts of modified starch, 2 parts of organic acid, 4 parts of modified paraffin, 1 part of hydroxypropyl methylcellulose, 1 part of antioxidant, 3 parts of solubilizer, 2 parts of stabilizer, 1 part of PPA polyphosphoric acid , 2 parts of SBS linear modifier, then heat the base asphalt to 140°C, put the natural asphalt and plant asphalt into the base asphalt and stir for 40min to obtain the first mixture; send the first mixture into the shear tank, at 180 At a temperature of ℃, put the thermoplastic elastomer into the fir...

Embodiment 2

[0038] In the embodiment of the present invention, a high-performance stable PPA and SBS composite modified asphalt preparation method, the steps are as follows:

[0039] Prepare the following raw materials in parts by weight: 65 parts of base asphalt, 45 parts of natural asphalt, 32 parts of vegetable asphalt, 52 parts of waste tire rubber powder, 23 parts of thermoplastic elastomer, 12 parts of modified calcium carbonate, and 8 parts of modified sulfur , 12 parts of modified starch, 2.5 parts of organic acid, 6 parts of modified paraffin, 1.5 parts of hydroxypropyl methylcellulose, 1.5 parts of antioxidant, 4 parts of solubilizer, 3 parts of stabilizer, 1.5 parts of PPA polyphosphoric acid , 2.5 parts of SBS linear modifier, then heat the base asphalt to 145°C, put the natural asphalt and plant asphalt into the base asphalt and stir for 45min to obtain the first mixture; send the first mixture into the shear tank, at 185 At a temperature of ℃, put the thermoplastic elastomer...

Embodiment 3

[0049] In the embodiment of the present invention, a high-performance stable PPA and SBS composite modified asphalt preparation method, the steps are as follows:

[0050] Prepare the following raw materials in parts by weight: 70 parts of base asphalt, 50 parts of natural asphalt, 35 parts of plant asphalt, 55 parts of waste tire rubber powder, 25 parts of thermoplastic elastomer, 15 parts of modified calcium carbonate, and 9 parts of modified sulfur , 13 parts of modified starch, 3 parts of organic acid, 7 parts of modified paraffin, 2 parts of hydroxypropyl methylcellulose, 2 parts of antioxidant, 5 parts of solubilizer, 4 parts of stabilizer, 2 parts of PPA polyphosphoric acid , 3 parts of SBS linear modifier, then heat the base asphalt to 150°C, put the natural asphalt and plant asphalt into the base asphalt and stir for 50min to obtain the first mixture; send the first mixture into the shear tank, at 190 At a temperature of ℃, put the thermoplastic elastomer into the firs...

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Abstract

The invention discloses a preparation method of high-performance stable PPA and SBS composite modified asphalt. The preparation method comprises the following steps: preparing the following raw materials: matrix asphalt, natural asphalt, plant asphalt, waste tire rubber powder, a thermoplastic elastomer, modified calcium carbonate, modified sulfur, modified starch, organic acid, modified paraffin, hydroxypropyl methyl cellulose, an antioxidant, a solubilizer, a stabilizer, PPA polyphosphoric acid and an SBS linear modifier. According to the invention, the prepared composite modified asphalt has good high-temperature, low-temperature and adhesion properties; modified sulfur is adopted to participate in a cross-linking reaction of SBS and asphalt to form a spatial network structure, so that the colloid structure of the asphalt is changed, and the temperature sensing performance of the asphalt is improved; waste tire rubber powder is added, so the stability of production quality and the stability of long-time storage and placement are guaranteed; the SBS improves the low-temperature and anti-aging properties of the asphalt; and the PPA has remarkable high-temperature stability and storage stability, so that the defects of high viscosity, poor storage stability, construction difficulty and the like of common rubber asphalt are overcome.

Description

technical field [0001] The invention relates to the technical field of modified asphalt preparation, in particular to a preparation method of high-performance stable PPA and SBS composite modified asphalt. Background technique [0002] Modified asphalt is the addition of external additives (modifiers) such as rubber, resin, high molecular polymer, ground rubber powder or other fillers, or taking measures such as mild oxidation of asphalt to make asphalt or asphalt mixture The performance of the asphalt binder can be improved. [0003] The existing modified asphalt generally adopts a single SBS modified asphalt. Although it can improve high temperature, low temperature and stability performance to a certain extent, it still has some shortcomings. The performance improvement is limited, and it is increasingly unable to meet higher use requirements. Contents of the invention [0004] The purpose of the embodiment of the present invention is to provide a high-performance stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L53/02C08L51/02C08L91/06C08L91/00C08K13/06C08K3/32C08K3/06C08K3/22C08K9/04C08K3/26
CPCC08L95/00C08L2201/08C08L2205/025C08L2205/035C08K2003/2227C08K2003/2224C08K2003/265C08K2003/323C08L19/003C08L53/02C08L51/02C08L91/06C08L91/005C08K13/06C08K3/32C08K3/06C08K3/22C08K9/04C08K3/26
Inventor 殷欢杨哲江田渭军陈赅李志刚张志跃李元成李永合
Owner THE THIRD ENG CO LTD OF CHINA RAILWAY SEVENTH GRP
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