Asphalt mixture fatigue loading device for simulating sudden changes in ambient temperature
A technology of asphalt mixture and temperature sudden change, which is applied in the direction of applying stable tension/pressure to test the strength of materials, and can solve the problems of huge cost, long cycle, and large structural impact
Inactive Publication Date: 2020-06-23
CHANGAN UNIV
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] 1. Outdoor test methods such as loop test and accelerated loading test are costly and long-term, and the test results are greatly affected by the local environment and the pavement structure used
[0005] 2. The indoor test cannot simulate the comprehensive stress state of the pavement unit well, which is different from the actual fatigue effect
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 Construction
[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0035] refer to figure 1 , the present invention includes an environmental chamber, a loading wheel 2, a test piece bearing plate 3, a dowel bar 4, a heat shield 5, a first slide rail 6, a first pulley 7, a wheel 8, a wheel hanging plate 9, a heating wire 10, Temperature sensor 11, displacement sensor 12, pressure sensor 13, servo hydraulic machine 14, connecting rod 15, control panel 16, positioning nut 17, door with glass window 18, support base 19, conduit 20, wire 21, evaporator 22 , filter 23, compressor 24, the second slide rail. The environment box is divided into two parts, the high temperature environment box 1-1 and the low temperature environment box 1-2, by the heat insulation board 5. The heat insulating plate 5 is a rotatable ceramic heat insulating plate, which can be rotated until its bottom is higher than the specimen carrying plate 3 .
...
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
Login to View More Abstract
The invention relates to an asphalt mixture fatigue loading device for simulating sudden changes in ambient temperature, comprising an environmental box and a test piece bearing plate that can slide back and forth in the horizontal direction arranged in the environment box; the environment box is separated by a heat shield to form a high-temperature environment box The high temperature environment box and the low temperature environment box are equipped with loading wheels that can apply pressure to the test piece and slide back and forth in the horizontal direction. The loading wheel is located above the test piece bearing plate. A power device; the heat shield can be rotated until its bottom is higher than the specimen bearing plate; a heating device is installed in the high-temperature environment box, and a refrigeration system is installed in the low-temperature environment box; temperature sensors are installed in both the high-temperature environment box and the low-temperature environment box, A displacement sensor and a pressure sensor are installed on the dowel bar, and the temperature sensor, the displacement sensor and the pressure sensor are all connected to the control panel. The invention can complete the fatigue performance test of asphalt mixture under the condition of sudden temperature change.
Description
technical field [0001] The invention belongs to the technical field of asphalt mixture fatigue loading equipment, in particular to an asphalt mixture fatigue loading device for simulating sudden changes in ambient temperature. Background technique [0002] Nowadays, with the rapid development of highway construction, highway workers not only pay attention to the early performance of asphalt mixture, but also attach great importance to the durability of asphalt mixture, that is, the fatigue performance of asphalt mixture. Fatigue refers to a failure phenomenon in which the pavement cracks when the material is subjected to repeated loads far below its ultimate strength. The fatigue performance of asphalt mixture is its ability to resist such fatigue damage under repeated loads. At present, the methods for testing the fatigue performance of asphalt mixture can be roughly divided into indoor and outdoor methods. Both test offenses have advantages and disadvantages. However, n...
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 Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/18
CPCG01N3/18
Inventor 郭寅川步金鑫林森林申爱琴翟超伟
Owner CHANGAN UNIV