Unlock instant, AI-driven research and patent intelligence for your innovation.

A monitoring method for asphalt mixture surface cracks

A technology for asphalt mixture and surface cracks, which is applied in the direction of measuring devices, analyzing materials, and material analysis through electromagnetic means, and can solve problems such as complicated operation, difficulty in real-time monitoring, and difficulty in popularization and application

Active Publication Date: 2017-12-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CT test system is expensive, complicated to operate, and often costs millions of dollars, making it difficult to popularize and apply
In addition, CT scanning mostly puts the specimens before and after destruction into industrial CT for scanning, and it is difficult to realize real-time monitoring during the test

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
  • A monitoring method for asphalt mixture surface cracks
  • A monitoring method for asphalt mixture surface cracks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Taking the plane tension / axial compression test of asphalt mixture as an example, the following introduces how to use the surface crack monitoring device and method of road materials to judge the cracking of the specimen surface:

[0031] (1) Cylindrical asphalt mixture specimens with a diameter of 100 mm and a height of 100 mm are formed by static pressure or rotary compaction. After core sampling, a hollow cylinder specimen with an outer diameter of 100 mm, an inner diameter of 20 mm and a height of 100 mm is obtained.

[0032] (2) After polishing the surface of the test piece, draw horizontal lines at the heights of 20mm, 40mm, 60mm, and 80mm on the inner surface and outer surface of the test piece to make marks.

[0033] (3) Select a conductive material or conductive solution (such as conductive silver) that is similar to the elongation of the test piece, pass through a groove with a width of 0.6mm, and apply it evenly on the inner and outer cylindrical surfaces of t...

Embodiment 2

[0043] Conductive silver glue of the present invention is finished according to following process step:

[0044] First prepare the following raw materials according to mass percentage:

[0045] 80% flaky silver powder, 8% organic resin, 6% diluent, 4% curing agent and 2% curing accelerator; the flaky silver powder is flaky silver powder with a particle size of 0.1-4μm and a purity of ≥99.9%. The above-mentioned organic resin is polyacrylic resin, the diluent is ethylene glycol butyl ether acetate, the curing agent is 1-cyanoethyl-2-phenylimidazole, and the curing accelerator is 4,4-diaminobenzyl imidazole.

[0046] The preparation method of curing conductive silver glue is as follows:

[0047] 1) First weigh flake silver powder with a particle size of 0.1 to 4 μm and a purity of ≥99.9% by mass percentage, and set aside;

[0048] 2) Weigh the organic resin and diluent according to the aforementioned mass percentage, heat at 60°C, and cool to room temperature after the resin i...

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
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A method for monitoring cracks on the surface of asphalt mixture, comprising conductive materials, lead-out sheets, wires, data acquisition devices and computers. The conductive material is smeared on the surface of the test piece to form an unclosed conductive loop, and the lead-out sheet is respectively connected to the unclosed conductive loop and the wire at both ends of the unclosed conductive loop, and then connected to the data acquisition device and connected to the computer. An energization circuit is formed, and the data acquisition device can monitor the cracks on the surface of the test piece in real time through the on and off of the circuit and display it on the computer. The device and method have the characteristics of high sensitivity, usability in complicated situations, low cost, and easy popularization and application, and solve the problems of complicated operation, expensive instruments, inconvenient use in complicated situations and limited application range of existing testing devices and methods. It is of great significance to study the mechanical properties of pavement materials and the prevention and control of pavement structure damage.

Description

technical field [0001] The invention belongs to the field of road engineering, in particular to a method for monitoring cracks on the surface of asphalt mixture. Background technique [0002] Since the reform and opening up, highways have always been the key construction areas with the largest annual investment and the fastest development in my country; as of the end of 2014, the number of expressways that have been completed and opened to traffic in my country has exceeded 100,000 kilometers. According to the development plan, tens of thousands of kilometers of expressways and one million kilometers of ordinary roads will be built in the next ten years, and a large number of asphalt roads will need to be repaired and improved. [0003] In the practice of road construction in our country, we have accumulated rich experience and solved many key technical problems. However, judging from the usage status of the roads that have been put into operation in recent years, most of t...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/61
Inventor 黄拓郑健龙钱国平
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY