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SEBS/biochar compound modified asphalt and preparation method thereof

A technology of compound modified asphalt and modified asphalt, applied in building structures, building components, building thermal insulation materials, etc., can solve the problems of reducing the low-temperature cracking resistance of asphalt and the influence of the comprehensive performance of asphalt, so as to improve the low-temperature cracking resistance. , good low temperature crack resistance and high temperature stability, and the effect of improving high temperature stability

Inactive Publication Date: 2018-02-27
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of biochar greatly reduces the low-temperature crack resistance of asphalt, which affects the overall performance of asphalt to a certain extent.

Method used

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  • SEBS/biochar compound modified asphalt and preparation method thereof
  • SEBS/biochar compound modified asphalt and preparation method thereof
  • SEBS/biochar compound modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A SEBS / biochar composite modified asphalt, including the following raw materials: 500g of SK90 base asphalt, YH-503SEBS accounting for 5% of the mass of SK90 base asphalt and DS-510F biochar accounting for 4% of the mass of SK90 base asphalt.

[0032] The preparation method of above-mentioned SEBS / biochar composite modified asphalt comprises the following preparation steps:

[0033] Step 1, heat the base asphalt in an oven at 160°C for 60 minutes to a molten state, add YH-503SEBS to the heated base asphalt, stir at 165°C for 12.5 minutes, and heat at a shear temperature of 170°C and a shear rate of 5000r Cut for 30 minutes under the condition of 1 / min, and then swell and develop in an oven at 170°C for 1 hour to obtain modified asphalt, which is ready for use;

[0034] Step 2: Dry the biochar in an oven at 120°C for 2 hours, put it in a drying container and cool it to room temperature, and obtain the cooled biochar for later use;

[0035] Step 3: Add the cooled biochar...

Embodiment 2

[0037] A SEBS / biochar composite modified asphalt, including the following raw materials: 500g of SK90 base asphalt, YH-503SEBS accounting for 5% of the mass of SK90 base asphalt and DS-510F biochar accounting for 8% of the mass of SK90 base asphalt.

[0038] The preparation method of above-mentioned SEBS / biochar composite modified asphalt comprises the following preparation steps:

[0039] Step 1, heat the base asphalt in an oven at 160°C for 60 minutes to a molten state, add YH-503SEBS to the heated base asphalt, stir at 165°C for 12.5 minutes, and heat at a shear temperature of 170°C and a shear rate of 5000r Cut for 30 minutes under the condition of 1 / min, and then swell and develop in an oven at 170°C for 1 hour to obtain modified asphalt, which is ready for use;

[0040] Step 2: Dry the biochar in an oven at 120°C for 2 hours, put it in a drying container and cool it to room temperature, and obtain the cooled biochar for later use;

[0041] Step 3: add the cooled biochar...

Embodiment 3

[0043] A SEBS / biochar composite modified asphalt, including the following raw materials: 500g of SK90 base asphalt, YH-503SEBS accounting for 5% of the mass of SK90 base asphalt and DS-510F biochar accounting for 12% of the mass of SK90 base asphalt.

[0044] The preparation method of above-mentioned SEBS / biochar composite modified asphalt comprises the following preparation steps:

[0045] Step 1: Heat the base asphalt in an oven at 160°C for 60 minutes to a molten state, add YH-503SEBS to the heated base asphalt, stir at 165°C for 12.5 minutes, and when the shear temperature is 170°C and the shear rate is Cut at 5000r / min for 30min, and then swell and develop in an oven at 170°C for 1h to obtain modified asphalt for later use;

[0046] Step 2: Dry the biochar in an oven at 120°C for 2 hours, put it in a drying container and cool it to room temperature, and obtain the cooled biochar for later use;

[0047] Step 3: Add the cooled biochar into the modified asphalt in 6 times w...

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Abstract

The invention discloses SEBS / biochar compound modified asphalt and a preparation method thereof. The SEBS / biochar compound modified asphalt is prepared from SEBS, biochar and matrix asphalt. The preparation method comprises the steps: heating the matrix asphalt, adding the SEBS into the heated matrix asphalt, stirring, shearing and swelling to obtain modified asphalt for standby application; stoving the biochar and cooling to room temperature to obtain cooled biochar for standby application; adding the cooled biochar into the modified asphalt and stirring and shearing to obtain the SEBS / biochar compound modified asphalt. The compound asphalt disclosed by the invention has the advantages of higher high-temperature stability, no effect on self low-temperature crack resistance, suitability for use in high-temperature plateau areas with strong ultraviolet rays and especially suitability for open-graded roads with higher requirements for aging performance. The preparation method has the advantages of simpleness, ability in reasonably utilizing the biochar, economical effect and environmental friendliness.

Description

technical field [0001] The invention relates to the field of road building materials, in particular to SEBS / biochar composite modified asphalt and a preparation method thereof. Background technique [0002] SEBS is a block copolymer obtained by selective hydrogenation of thermoplastic elastomer styrene-butadiene-styrene (SBS). Commonly used SEBS-modified asphalt has poor low-temperature crack resistance and high-temperature stability, and its high cost makes it unable to be used in high-temperature and heavy-duty areas in the south and areas with strong ultraviolet rays on the plateau. [0003] Biochar is a carbonaceous solid residue obtained by pyrolysis of biomass (agricultural and forestry residues and organic waste generated in daily life) under the condition of insufficient oxygen. The solubility of biochar is extremely low and it has a high degree of carboxylation And aromatized structure, and large porosity and specific surface area, it is a material with high carbon...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08K3/04
Inventor 傅珍林萌蕾侯仁辉徐峰
Owner CHANGAN UNIV
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