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Biological asphalt, SBS and PPA composite modified asphalt and preparation method thereof

A technology of composite modified asphalt and bio-asphalt, applied in the preparation of PPA composite modified asphalt, SBS, PPA composite modified asphalt, bio-asphalt field, can solve the problems of poor compatibility between SBS and asphalt, high modification cost, and achieve Improved compatibility, good economy, and low SBS content

Pending Publication Date: 2022-07-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide a kind of bio-asphalt, SBS, PPA compound modified asphalt, to solve the poor compatibility between existing SBS and asphalt, the segregation phenomenon is obvious in long-term high-temperature storage, SBS is modified high cost problem

Method used

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  • Biological asphalt, SBS and PPA composite modified asphalt and preparation method thereof
  • Biological asphalt, SBS and PPA composite modified asphalt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] The bio-asphalt, SBS and PPA composite modified asphalt of the present invention has the following components according to mass fraction: 90 parts of petroleum asphalt, 10 parts of bio-asphalt, 3.5 parts of styrene-butadiene-styrene block copolymer, 0.02 part of stabilizer, 0.5 part of polyphosphoric acid.

[0030] The preparation method of the above-mentioned bio-asphalt, SBS, PPA composite modified asphalt is specifically implemented according to the following steps:

[0031] Step 1, heating, mixing and shearing the petroleum asphalt and bio-asphalt; the heating temperature for heating, mixing and shearing is 140°C, the shearing speed is 1000rpm, and the stirring time is 20min;

[0032] Step 2, add styrene-butadiene-styrene block copolymer to the product obtained in step 1, and carry out shearing and stirring; the heating temperature for shearing and stirring is 175°C, the shearing time is 30min, and the shearing The speed is 5000rpm;

[0033] In step 3, a stabilize...

Embodiment 2

[0036] The bio-asphalt, SBS, PPA composite modified asphalt of the present invention has the following components by mass fraction: 90 parts of petroleum asphalt, 10 parts of bio-asphalt, 3 parts of styrene-butadiene-styrene block copolymer, 0.02 part of stabilizer, 1 part of polyphosphoric acid.

[0037] The preparation method of the above-mentioned bio-asphalt, SBS, PPA composite modified asphalt is specifically implemented according to the following steps:

[0038] Step 1, heating, mixing and shearing the petroleum asphalt and bio-asphalt; the heating temperature for heating, mixing and shearing is 140°C, the shearing speed is 1000rpm, and the stirring time is 20min;

[0039] Step 2, add styrene-butadiene-styrene block copolymer to the product obtained in step 1, and carry out shearing and stirring; the heating temperature for shearing and stirring is 175°C, the shearing time is 30min, and the shearing The speed is 5000rpm;

[0040] In step 3, a stabilizer is added to the...

Embodiment 3

[0043] The bio-asphalt, SBS and PPA composite modified asphalt of the present invention has the following components according to mass fraction: 90 parts of petroleum asphalt, 15 parts of bio-asphalt, 2.5 parts of styrene-butadiene-styrene block copolymer, 0.02 parts of stabilizer, 1.5 parts of polyphosphoric acid.

[0044]The preparation method of the above-mentioned bio-asphalt, SBS, PPA composite modified asphalt is specifically implemented according to the following steps:

[0045] Step 1, heating, mixing and shearing the petroleum asphalt and bio-asphalt; the heating temperature for heating, mixing and shearing is 140°C, the shearing speed is 1000rpm, and the stirring time is 20min;

[0046] Step 2, add styrene-butadiene-styrene block copolymer to the product obtained in step 1, and carry out shearing and stirring; the heating temperature for shearing and stirring is 175°C, the shearing time is 30min, and the shearing The speed is 5000rpm;

[0047] In step 3, a stabiliz...

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Abstract

The invention discloses biological asphalt, SBS (styrene-butadiene-styrene) and PPA (phenyl-propanolamine) composite modified asphalt. The composite modified asphalt is prepared from the following components in parts by mass: 50 to 99 parts of petroleum asphalt, 1 to 50 parts of biological asphalt, 1 to 6 parts of styrene-butadiene-styrene block copolymer, 0.01 to 0.02 part of stabilizer and 0.1 to 3 parts of polyphosphoric acid. The invention also discloses a preparation method of the biological asphalt, SBS and PPA composite modified asphalt. The preparation method is specifically implemented according to the following steps: step 1, heating, mixing and shearing the petroleum asphalt and the biological asphalt; step 2, adding a styrene-butadiene-styrene block copolymer into a product obtained in the step 1, and shearing and stirring; step 3, adding a stabilizer into a product obtained in the step 2, and shearing and stirring; and step 4, adding polyphosphoric acid into the product obtained in the step 3, and shearing and stirring.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, in particular to a bio-asphalt, SBS, PPA composite modified asphalt, and also to a preparation method of the bio-asphalt, SBS, PPA composite modified asphalt. Background technique [0002] Styrene-butadiene-styrene block copolymer (SBS for short) modified asphalt has always been the preferred material for asphalt pavement in my country. It can change the mechanical properties of light components in asphalt after being mixed at high temperature and fully swollen. While improving the high temperature deformation resistance of asphalt, it still has excellent low temperature performance. [0003] However, due to the large difference in density between the two, and in the blending system of SBS and asphalt, SBS and asphalt are in a two-phase structure, that is, the SBS particles are the dispersed phase and the asphalt is the continuous phase, so the compatibility between SBS and asphalt is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/32C08K3/06C08K5/14
CPCC08L95/00C08K2003/329C08L2205/025C08L53/02C08K3/32C08K3/06C08K5/14
Inventor 杨小龙刘贵勇孟勇军容洪流宁志康彭春宏
Owner GUANGXI UNIV
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