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Method for determining short-term aging test parameters of SBS modified asphalt

A technology of modified asphalt and test parameters, applied in the direction of flow characteristics, measuring devices, instruments, etc., can solve the problem of no correlation between the degree of on-site aging and so on

Pending Publication Date: 2021-06-22
SHANXI TRAFFIC PLANNING PROSPECTING & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing short-term aging test parameters are applied to the measurement of SBS modified asphalt, the aging degree simulated by indoor short-term aging has no correlation with the on-site aging degree, and provides a short-term aging test parameter of SBS modified asphalt method of determination

Method used

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  • Method for determining short-term aging test parameters of SBS modified asphalt
  • Method for determining short-term aging test parameters of SBS modified asphalt
  • Method for determining short-term aging test parameters of SBS modified asphalt

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Embodiment 1

[0034] A method for determining the parameters of the short-term aging test of SBS modified asphalt, the method is realized by the following steps:

[0035] S1: Sampling of SBS modified asphalt: Take the SBS modified asphalt sample from the construction site to obtain the original;

[0036] S2: Indoor aging of the original: Prepare seven test samples with the original sample taken in step S1, and put each test sample into a film heating oven for film heating test, obtain the residue after film heating, and test seven test samples The temperature is 180°C, and the aging time t of the seven test samples is 85min, 180min, 270min, 300min, 360min, 450min, 540min;

[0037] S3: Determination of the original penetration and residue penetration: Determination of the original penetration P 0 and each residue penetration P in step S2 i , i=1,...,7;

[0038] S4: The establishment of the nonlinear aging equation of SBS modified asphalt: the aging time t in step S2 i , the original need...

Embodiment 2

[0054] A method for determining the parameters of the short-term aging test of SBS modified asphalt, the method is realized by the following steps:

[0055] S1: Sampling of SBS modified asphalt: Take the SBS modified asphalt sample from the construction site to obtain the original;

[0056] S2: Indoor aging of the original: Prepare seven test samples with the original sample taken in step S1, and put each test sample into a film heating oven for film heating test, obtain the residue after film heating, and test seven test samples The temperature is 180°C, and the aging time t of the seven test samples is 85min, 180min, 270min, 300min, 360min, 450min, 540min;

[0057] S3: Determination of the original penetration and residue penetration: Determination of the original penetration P 0 and each residue penetration P in step S2 i , i=1,...,7;

[0058] S4: The establishment of the nonlinear aging equation of SBS modified asphalt: the aging time t in step S2 i , the original need...

Embodiment 3

[0074] A method for determining the parameters of the short-term aging test of SBS modified asphalt, the method is realized by the following steps:

[0075] S1: Sampling of SBS modified asphalt: Take the SBS modified asphalt sample from the construction site to obtain the original;

[0076] S2: Indoor aging of the original: Prepare seven test samples with the original sample taken in step S1, and put each test sample into a film heating oven for film heating test, obtain the residue after film heating, and test seven test samples The temperature is 180°C, and the aging time t of the seven test samples is 85min, 180min, 270min, 300min, 360min, 450min, 540min;

[0077] S3: Determination of the original penetration and residue penetration: Determination of the original penetration P 0 and each residue penetration P in step S2 i , i=1,...,7;

[0078] S4: The establishment of the nonlinear aging equation of SBS modified asphalt: the aging time t in step S2 i , the original need...

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Abstract

The invention particularly relates to a method for determining short-term aging test parameters of SBS modified asphalt, and solves the problem that the aging degree simulated by indoor short-term aging has no correlation with the field aging degree when the existing short-term aging test parameters are applied to determination of the SBS modified asphalt. The invention discloses a method for determining short-term aging test parameters of SBS modified asphalt. The method comprises the following steps: S1, sampling the SBS modified asphalt; S2, performing indoor aging on the original sample; S3, measuring the needle penetration of the original sample and the needle penetration of the residues; S4, establishing an SBS modified asphalt nonlinear aging equation; S5, performing sampling of the SBS modified asphalt mixture; S6, recovering the SBS modified asphalt from the SBS modified asphalt mixture; S7, determining the needle penetration of the recycled SBS modified asphalt; and S8, determining short-term aging test parameters of the SBS modified asphalt. According to the method, the site construction conditions of the SBS modified asphalt mixture are simulated to the maximum extent, and the short-term aging performance of the SBS modified asphalt can be accurately evaluated by utilizing the short-term aging test parameters of the SBS modified asphalt determined by the method.

Description

technical field [0001] The invention relates to a method for determining parameters used in road engineering, in particular to a method for determining parameters of a short-term aging test of SBS modified asphalt. Background technique [0002] In road engineering, the aging process of pavement asphalt can be divided into the aging process of mixture mixing, transportation, paving, rolling and aging in the process of road surface use. When the asphalt paving and rolling are completed, it can be considered as short-term aging Finish. In my country's current "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2001), the asphalt film heating test (T0609-2011) and the asphalt rotating film heating test (T 0610-2011) are used for short-term aging of asphalt, and the determination of film Changes in properties such as penetration, ductility, softening point, and viscosity of the residue after heating are used to evaluate the aging resistance of asph...

Claims

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Application Information

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IPC IPC(8): G01N11/12
CPCG01N11/12
Inventor 王国安李智慧郝俊园张涛刘伟李海清杨文江崔平段振刚崔伟兰建丽
Owner SHANXI TRAFFIC PLANNING PROSPECTING & DESIGN INST