Asphalt mixture static modulus testing method

A technology of asphalt mixture and static modulus, applied in the direction of applying stable tension/pressure to test material strength, etc., can solve the problem of high requirements for test equipment, unfavorable test method promotion, and lack of good simulation of asphalt mixture stress Status and other issues, to achieve the effect of simple operation and simple equipment

Inactive Publication Date: 2013-08-14
SOUTHEAST UNIV +1
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the triaxial test is that it does not simulate the stress state of the actual pavement asphalt mixture well, and the confining pressure of the lateral restraint is a fixed value.
At the same time, it is very difficult to apply the confining pressure in the triaxial test, requiring a closed triaxial chamber, which has high requirements for the test equipment, which is not conducive to the popularization of the test method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Asphalt mixture static modulus testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] A method for testing the static modulus of an asphalt mixture comprises the following steps.

[0024] (1) Prepare a cylindrical specimen of asphalt mixture and two steel indenters.

[0025] The cylindrical specimens were prepared in the following way: first, according to the gradation and asphalt-stone ratio of the asphalt mixture to be evaluated, four asphalt mixture specimens were formed by using the asphalt mixture rotary compactor, and the porosity of the asphalt mixture specimens was 4%; then cut the asphalt mixture test piece into a cylindrical test piece with a diameter of 150mm and a height of 80mm; Measure the height of the cylindrical specimen in four symmetrical directions. If the height difference between any two sides is greater than 2mm, the specimen will be discarded.

[0026] Both steel indenters are of cylindrical structure with a diameter of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses an asphalt mixture static modulus testing method comprising the following steps of: (1) preparing a cylindrical test piece of an asphalt mixture, and two steel pressure heads; (2) placing the cylindrical test piece and the two steel pressure heads into a thermostat with target temperature, and preserving heat for more than 5 hours; (3) taking out the cylindrical test piece and the two steel pressure heads, respectively arranging the two steel pressure heads at the centers of two end faces of the cylindrical test piece; (4) loading the cylindrical test piece by means of changing the load speed of the steel pressure head, and simultaneously recording the load-deformation curve of the cylindrical test piece; and (5) calculating the static modulus of the asphalt mixture according to the load-deformation curve and the structure size of the cylindrical test piece. According to the asphalt mixture static modulus testing method provided by the invention, the used local loading test can effectively simulate the side constraint to the asphalt mixture in the actual road surface; and the test devices used in the method are simple and easy to operate, so that the test can be carried out in normal laboratories.

Description

technical field [0001] The invention relates to a method for testing the static modulus of asphalt mixture, which belongs to the technique of testing the mechanical properties of asphalt mixture. Background technique [0002] The uniaxial compression test of asphalt mixture used in my country's "Asphalt and Asphalt Mixture Test Regulations" (JTJ052-2000) cannot simulate the lateral restraint of the actual asphalt pavement. However, the presence or absence of lateral constraints has a great influence on the deformation characteristics of the mixture, so the presence of lateral constraints can more realistically simulate the actual situation. Only tests that can simulate the confining pressure state of actual pavement asphalt mixture (including lateral constraints) can obtain accurate mechanical parameters. The lateral constraints in the actual pavement will change due to the performance of the asphalt mixture, the magnitude of the load and the change of temperature, so impos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/08
Inventor 黄晓明张东张裕卿张志祥
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap