A Design Method of Modified Asphalt Mixture Applicable to Areas with Different Temperature Differences

A technology for asphalt mixture and modified asphalt, which is applied in the field of asphalt mixture to achieve the effect of improving design level and service life, enhancing low temperature crack resistance and improving road performance

Active Publication Date: 2019-04-02
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a modified asphalt mixture design method used in regions with different temperature differences, aiming to solve the
[0007] There are differences in pavement temperature diseases in different regions, and the high temperature stability and low temperature crack resistance of asphalt mixture are contradictory

Method used

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  • A Design Method of Modified Asphalt Mixture Applicable to Areas with Different Temperature Differences
  • A Design Method of Modified Asphalt Mixture Applicable to Areas with Different Temperature Differences
  • A Design Method of Modified Asphalt Mixture Applicable to Areas with Different Temperature Differences

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Embodiment Construction

[0037] In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples, but the implementation of the present invention is not limited thereto. Specifically follow the steps below:

[0038] 1. Determine the temperature range

[0039] The upper limit of high temperature is determined to be 50°C, and the lower limit of low temperature is -10°C, that is, the temperature research range is -10°C to 50°C.

[0040] 2. Select the type of asphalt mixture

[0041] Use AC-16 asphalt mixture.

[0042] 3. Selection and testing of raw materials

[0043] (1) Preparation and testing of shaped phase change materials

[0044] In this example, PEG4000 is selected as the phase change material, expanded perlite is used as the carrier, and the vacuum impregnation method is used to prepare the shape-setting phase change material through the encapsulation process. Through comprehensive ...

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Abstract

The present invention belongs to the technical field of road engineering, and particularly relates to a design method of a modified asphalt mixture for areas having different temperature difference. The design method comprises: determining the annual temperature difference of areas, selecting the type of an asphalt mixture; selecting and testing raw materials, carrying out grading design on mineral aggregate, determining an oil-stone ratio, preparing a modified asphalt mixture, inspecting the cooling performance and the road performance, determining the thermal change point and the cold change point, and evaluating the modified asphalt mixture according to the thermal change point and the cold change point. With the design method of the present invention, the difference of the pavement temperature diseases in different areas in our country can be effectively solved, the quantitative index can be provided for the evaluation of the high temperature stability and the low temperature crack resistance, the modified asphalt mixture with characteristics of high temperature road performance improving and low temperature crack resistance enhancing can be developed, and the high engineering practice value is provided.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to an asphalt mixture, in particular to a design method for a modified asphalt mixture suitable for areas with different temperature differences. Background technique [0002] Asphalt pavement is widely used in high-grade highways in my country because of its good flatness, comfort, low noise, comfortable driving, wear resistance, and easy maintenance. However, asphalt pavement is prone to high-temperature rutting, low-temperature cracks and other diseases, for which there is no effective solution so far. The low-temperature and high-temperature damage of asphalt pavement is mainly related to ambient temperature, traffic load, pavement material and structure. Our country has a vast territory, and the climate is changeable, with great differences between different regions. In Northeast China, Xinjiang, Northwest Shaanxi and other northern regions, the temperature difference b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B24/32
CPCC04B26/26C04B40/0039C04B2103/0071C04B2111/0075C04B14/28C04B14/06C04B14/08C04B24/32C04B14/185
Inventor 金娇刘若华林飞鹏郑健龙吕松涛任天锃
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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