Research on the Quality of Asphalt Pavement Construction Based on Nondestructive Testing Technology

Wei Chen,Xizhong Xu,Xiangpeng Yan,Jincheng Wei,Xiaomeng Zhang,Wenyang Han,Guiling Hu

doi:10.3390/coatings12030379

Abstract

In order to better evaluate the construction quality of asphalt pavement, nondestructive testing techniques are used to inspect newly paved asphalt mixture pavement. The proposed system for the evaluation of asphalt pavement construction quality uses three-dimensional ground-penetrating radar (GPR) and a non-nuclear density gauge. The GPR and the non-nuclear density gauge test results were used to establish a dielectric constant–porosity model by fitting. This approach can more accurately determine the dielectric constant selection scheme of the GPR based on the average value of every 10 dielectric constant data points in the length direction of the radar antenna and every three data channels in the width direction. The GPR collected the dielectric constants of the road surface based on the total reflection method and used the average value of the local dielectric constant to evaluate the construction quality of the road. The non-nuclear density gauge used the local porosity to assess the construction quality of the road. It is recommended that the two testing schemes described above be used to evaluate the quality of asphalt pavement construction. They can provide theoretical guidance for future applications in practical processes.

Highlights

The average over a distance of 30–42 m was 5.15, which was close to the dielectric. In this we proposed the use of a PQI 380 with groundpenetrating radar (GPR)
We proposed the use of a PQI 380 with GPR as a nondestructive testing tool for more efficient and accurate inspection of asphalt pavement construction quality
(1) The optimization of the dielectric constants collected by the GPR led to the identification of a new choice of values for the dielectric constants of the radar antenna channels

Summary

Introduction

By the end of 2020, China had 160,000 km of motorways open to traffic, putting it in first place globally; the highway coverage of cities with a population of 200,000 or more exceeded 98% [1]. For highways with design lives of 20 years, asphalt mixture pavements are used, but they are susceptible to heavy loads, high temperatures, rain, and other adverse coupled factors [2]. They are prone to early severe damage, such as wheel ruts, potholes, looseness, flooding oil, and swelling within the first 1–2 years of use [3]. As these phenomena are not evident early on in use, the development of early failure is difficult to control, increasing the maintenance and repair costs of the road at later stages, affecting the comfort and safety of vehicle travel, and reducing the normal service life of the road. The quality control problems contribute to early failure during the construction of new asphalt mixture pavement [4], which is mainly reflected by the porosity of the asphalt mixture.

Objectives

Methods

Conclusion