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A Prediction Method of Asphalt Aging Performance and Its Application

A technology of aging performance and prediction method, which is applied in the field of building materials, can solve the problems of lack of theoretical research-practical engineering research, and achieve accurate prediction and evaluation

Active Publication Date: 2021-06-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At the same time, in the existing technology, there is no discussion on how to apply the asphalt aging prediction method to specific projects, that is, there is a lack of research on the combination of theoretical research and practical engineering

Method used

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  • A Prediction Method of Asphalt Aging Performance and Its Application
  • A Prediction Method of Asphalt Aging Performance and Its Application
  • A Prediction Method of Asphalt Aging Performance and Its Application

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Embodiment Construction

[0076] The steps of a method for predicting asphalt aging performance are as follows:

[0077] Step 1: Use 3 kinds of bitumen from different origins and different grades. After the short-term film oven test (RTFO), pour a certain quality of bitumen into the container, cool to room temperature, and add tetrahydrofuran to the container to fully dissolve the bitumen in tetrahydrofuran. middle. Multiple carriers are provided, and the dissolved asphalt organic solution is poured into the carriers, and the quality of the asphalt sample poured into each carrier is equal. Stand still for 24 hours, after the tetrahydrofuran is fully volatilized, the asphalt forms a film on the surface of the carrier. In the present invention, the carrier is an aluminum disc with a diameter of 10 cm, and the actual pitch poured into the carrier is 1 g-10 g to form pitch film samples with film thicknesses of 0.1 mm-1 mm.

[0078] In step 2, each bitumen film sample is placed in a known light-thermal co...

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Abstract

The invention discloses a method for predicting the aging performance of asphalt and its application. The asphalt carbonyl index is used as an index of the asphalt aging performance; The main point of quantitative analysis is that the formula for calculating the carbonyl generation rate in asphalt at any temperature and UV intensity is given. By comparing the measured data with the predicted data, the asphalt aging performance can be better predicted by using the method for predicting the aging performance of the asphalt and its application.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for predicting the aging performance of asphalt and its application. Background technique [0002] Aging is the main factor affecting the use efficiency of asphalt on pavement, and evaluating and predicting the aging performance of asphalt is very important for delaying aging. [0003] In the existing technology: "Aging Anti-aging Performance Estimation Model of Airport Pavement Based on PG Value", Liu Fang et al., Journal of Building Materials, February 2017 (Volume 20, Issue 1), starting from the aging mechanism of asphalt, proposed A prediction model for predicting the anti-aging performance of airport pavement asphalt; under standard atmospheric pressure, one kind of base asphalt and two kinds of modified asphalt were subjected to aging treatment at four temperatures for different time periods, and a dynamic rheological shear instrument (DSR ) to test the PG upper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563G01N33/42
CPCG01N21/3563G01N33/42G01N2021/3595
Inventor 刘芳董晓强张翛王宇
Owner TAIYUAN UNIV OF TECH