Journal
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
Volume 33, Issue 8, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)MT.1943-5533.0003859
Keywords
Asphalt mixture; Relative humidity; Frequency; Relative humidity-frequency equivalence principle; Dielectric properties; Relative dielectric constant
Categories
Funding
- 973 Program of the Ministry of Science and Technology of China [2015CB060100]
- Key Research and Development Project of Science and Technology Department of Hubei Province of China [2020BCA085]
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A dielectric composite model of asphalt mixtures based on relative humidity and frequency was established and verified for accuracy and reliability. The relative humidity-frequency equivalence principle was proposed to unify detection data under different conditions, providing a basis for converting test results of different nondestructive testing equipment.
Asphalt pavement contains dynamically changing moisture, and the movement of this moisture will change the relative humidity of the pavement, thereby affecting the dielectric properties of the asphalt mixture. To improve the detection accuracy of nondestructive testing equipment and quantify the influence of relative humidity and frequency on the dielectric properties of asphalt mixtures, a dielectric composite model of asphalt mixtures based on relative humidity and frequency was established through theoretical deduction. The relative dielectric constant and dielectric loss of two asphalt mixtures were evaluated under different relative humidity and frequency conditions to verify the accuracy and reliability of the proposed model. The obtained goodness-of-fit verified wide applicability of the model. To realize the unification of the detection data under different relative humidity and frequency conditions, the relative humidity-frequency equivalence principle was established, and feasibility was verified in experiments that displayed strong applicability within a certain relative humidity and frequency range, thus providing a basis for realizing the conversion of the test results of different nondestructive testing equipment.
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