Simple method for determining high modulus asphalt fatigue performance
A fatigue performance and high modulus technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, can solve the problems of no effective evaluation index and test method for asphalt fatigue performance, no reflection of asphalt fatigue performance, etc., to achieve The results are accurate and credible, the method is simple, and the data processing is simple.
Inactive Publication Date: 2013-08-28
TONGJI UNIV
View PDF8 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Among the current three types of asphalt evaluation systems, the penetration grading system and viscosity grading system have no evaluation indicators reflecting the fatigue performance of asphalt, and the fatigue factor G*sinδ index proposed in the PG grading system cannot correctly characterize the fatigue performance of asphalt
Generally speaking, there are no evaluation indicators and test methods to effectively characterize the fatigue performance of asphalt in the existing asphalt performance evaluation system.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0020] In order to clarify the simple method for testing the fatigue performance of high modulus asphalt, a typical test is now described.
[0021] (1) Forming test piece: heat the high modulus asphalt to a flowing state, pour at least 3 circular parallel test pieces with a diameter of about 8 mm and a height of 2 mm to 2.5 mm, and place the caulk test pieces at room temperature to cool, and the cooling time is not less than 30 minutes.
[0022] (2) Place the test piece: choose a circular plate fixture with a diameter of 8 mm, place the high modulus asphalt test piece between the fixtures, adjust the distance between the upper and lower fixtures to 2050 μm, and adjust the distance between the fixtures to 2000 μm after trimming the sample.
[0023] (3) Heat preservation: immerse the trimmed high-modulus asphalt specimen and the fixture in a water bath at 82°C for no less than 20 minutes (the high-temperature heat preservation is to ensure that the asphalt specimen and the fixtu...
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
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
Login to View More
Abstract
The present invention relates to a simple method for determining high modulus asphalt fatigue performance. The method comprises: adopting a time scanning test to test plural shear moduli of high modulus asphalt under different loading times; and specifically adopting the loading time corresponding to attenuation of the plural shear moduli to 50% of the initial value at a temperature of 20 DEG C under frequency of 10 Hz, a strain of 1% (characterizes light traffic), a strain of 3% (characterizes moderate traffic) and a strain of 5% (characterizes heavy traffic) as a characteristic value of a high modulus asphalt fatigue performance simple test method. The test method has the following characteristics that: test data treatment is simple, special data analysis software is not required, high modulus asphalt fatigue performance simple test method application and promotion are easily achieved, the strain of the high modulus asphalt fatigue performance is 1-5% so as to carry out fatigue performance comparison on the high modulus asphalt under the same strain condition, and evaluation indexes are scientific and credible.
Description
technical field [0001] The invention belongs to the field of road engineering, in particular to a simple method for measuring the fatigue performance of high modulus asphalt. Background technique [0002] Fatigue cracking is one of the main diseases affecting the performance of asphalt pavement. The fatigue performance of the mixture must be considered in the structural design of asphalt mixture and asphalt pavement. The fatigue performance of asphalt mixture is mainly affected by the fatigue performance of asphalt. Among the current three types of asphalt evaluation systems, the penetration grading system and viscosity grading system have no evaluation indicators reflecting the fatigue performance of asphalt, and the fatigue factor G*sinδ index proposed in the PG grading system cannot correctly characterize the fatigue performance of asphalt. Generally speaking, there are no evaluation indexes and test methods to effectively characterize the fatigue performance of asphalt ...
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
Login to View More IPC IPC(8): G01N3/32
Inventor 李立寒孙艳娜汪于凯祁文洋
Owner TONGJI UNIV