Device for testing composite asphalt pavement interlayer shear fatigue, and method thereof
An asphalt pavement, interlayer shearing technology, applied in the direction of using a stable shear force to test the strength of materials, can solve the problem of inability to accurately evaluate the interlayer shear strength and shear fatigue performance, inconsistent with the stress state of the pavement, etc. problems, to achieve the effect of authenticity and scientificity, convenient operation, and simple structure of the test instrument
Active Publication Date: 2012-06-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF7 Cites 35 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The Chinese invention patent with the application publication number CN 102095680 A discloses a fixture for testing pavement interlayer shear fatigue specimens and its testing method. This method is not aimed at composite asphalt pavement structures and uses direct shear In addition to the horizontal friction force of the wheels on the road surface, the pavement structure is also subjected to the vertical pressure of the vehicle loa
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
[0042] 1. According to the test requirements, select the pressing block and supporting block with a radius of 50.8mm and a height of 50mm.
[0043] 2. Preparation of Specimen
[0044] 2.1 Fabrication of cement concrete base
[0045] Pour C35 cement concrete specimens in the asphalt mixture Marshall test mold. When pouring cement concrete, it must be vibrated and compacted, and then the surface of the cement concrete base is exposed, and then the specimens are placed in a standard curing room for curing. After curing for 24 hours Lightly tap the mold with a wooden hammer, and then place the specimen in a standard curing room for curing until the strength meets the design requirements.
[0046] 2.2 Fabrication of the bonding layer
[0047] Clean the surface of the test piece whose strength meets the design requirements in step 2.1, and evenly coat the surface with SBS modified asphalt, and then sprinkle gravel with a single particle size of 16mm to 19mm on the surface of the a...
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 discloses a device for testing composite asphalt pavement interlayer shear fatigue, and a method thereof. According to the present invention, a skew shearing experiment is adopted to determine the composite asphalt pavement interlayer shear fatigue lives under different temperature conditions. The device comprises a loading bar, a load testing system, a pressing block, a supporting block and a support platform, wherein the pressing block and the supporting block are provided with a concave part, when the loading rod loads, a specimen requiring test is positioned in a space formed by docking of the two concave parts. The testing method is: placing the specimen in the supporting block and the pressing block, loading on the specimen through a testing machine to generate the skew shearing failure to obtain the maximum failure load, and carrying out the shear fatigue experiment under the repeated load effect according to 0.2-0.8 times the maximum failure load. The device and the method are simple and easy to operate, the actual stress state of the composite asphalt pavement can be accurately simulated, and the important significances are provided for the designs and the evaluations of the composite asphalt pavement interlayer shear property and the interlayer structure and material, and the design of the asphalt layer thickness.
Description
technical field [0001] The invention belongs to the technical field of road engineering, and relates to a device and method for interlayer shear fatigue testing of composite asphalt pavement. Background technique [0002] With the rapid development of highway construction in our country, the phenomenon of vehicle overloading is very common due to imperfect management and the drive of transportation and operation interests. The service life of expressway pavement is often lower than the design service life, and the early damage of pavement has caused great economic loss and waste of resources to the country, and has aroused widespread concern from the whole society. It is urgent to improve the durability of road engineering and promote the Better development of transportation business. Under this new situation, the highway industry is required to take the road of sustainable development, further increase scientific and technological innovation, and build highway projects tha...
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): G01N3/24
Inventor 李盛刘朝晖秦仁杰邹新特
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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
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