Related Experiment Video
Updated: Jan 4, 2026
08:03
Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight
Published on: May 31, 2022
5.5K
Characterizing the Complex Modulus of Asphalt Concrete Using a Scanning Laser Doppler Vibrometer
Navid Hasheminejad1, Cedric Vuye2, Alexandros Margaritis3
1Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium. navid.hasheminejad@uantwerpen.be.
Materials (Basel, Switzerland)
|November 2, 2019
Summary
This study introduces a novel optical method using laser Doppler vibrometry to determine the complex modulus of asphalt concrete. This technique offers a simpler, more comprehensive alternative to standard stiffness tests, yielding comparable results at higher frequencies.
Area of Science:
- Materials Science
- Civil Engineering
- Mechanical Engineering
Background:
- Asphalt mixtures are crucial for pavement construction, requiring accurate mechanical characterization for durability and sustainability.
- Standard methods for determining the complex modulus of elasticity in asphalt are often costly, complex, and sensitive to experimental conditions.
Purpose of the Study:
- To develop an alternative, easier, and more comprehensive method for characterizing asphalt mechanical properties.
- To utilize laser Doppler vibrometry and system identification techniques for determining the complex modulus of asphalt concrete.
Main Methods:
- Employing laser Doppler vibrometry for optical measurement of asphalt behavior.
- Applying frequency domain system identification with Timoshenko's beam theory to determine the complex modulus.
- Generating a master curve using the proposed optical method and comparing it with standard four-point bending tests.
Main Results:
- The proposed optical method successfully produced a master curve comparable to that obtained from standard four-point bending tests.
- The method demonstrated the capability to accurately determine the complex modulus at high frequencies (beyond 30 Hz).
Conclusions:
- The laser Doppler vibrometry-based method shows significant potential to replace conventional, complex stiffness tests for asphalt.
- This technique enables more accurate high-frequency analysis of asphalt properties, facilitating improved pavement modeling and simulation.
Related Concept Videos
01:16Dynamic Modulus of Elasticity of Concrete
884
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
884
01:23Measurement of Air Content in Concrete
550
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
The pressure method,...
550
01:20Elasticity in Concrete
288
Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
288
01:23Abrasion Resistance of Concrete
461
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
461
01:22Vebe Test
510
The Vebe test is a method used to measure the workability of concrete, particularly effective for dry concrete mixes. This test employs a specific apparatus that includes a cylindrical chamber, a standard slump cone, and a transparent disc-shaped rider, all mounted on a vibrating table. The cylindrical chamber has dimensions of nine and a half inches in diameter and eight inches in height.
To conduct the test, concrete is placed into the slump cone. The concrete is filled in layers and...
To conduct the test, concrete is placed into the slump cone. The concrete is filled in layers and...
510
01:12Non-destructive Tests for Concrete Strength
429
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
429