Evaluating asphalt concrete air void variation via GPR antenna array data

Hoegh, Kyle; Khazanovich, Lev; Dai, Shongtao; Yu, Thomas

doi:10.1016/j.csndt.2015.03.002

Cited by 50 publications

(28 citation statements)

References 11 publications

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“…Various impulse radar versions of ground penetrating radar have shown that the dielectric properties determined from the asphalt surface reflection amplitude corresponds with core measured air void content [9][10]. Additionally, a step frequency array-based method improves the coverage and productivity of the measurements, making it an attractive alternative to current stateof-the-practice procedures [11]. While these studies showed the potential of new technology for improved quality assurance in selected locations, the focus of this study is on how full coverage implementation following the final roller could be utilized on a construction project.…”

Section: Introductionmentioning

confidence: 99%

“…While these studies showed the potential of new technology for improved quality assurance in selected locations, the focus of this study is on how full coverage implementation following the final roller could be utilized on a construction project. In the case of the step-frequency array system [11], these technologies can require intensive data processing from the frequency domain or can be cost prohibitive, while the single impulse array systems [9][10] do not provide necessary coverage for widespread implementation. The method presented in this study is based on a system that evolved from recent research conducted under a National Academies of Science sponsored Strategic Highway Research Program (SHRP-2) [12].…”

Section: Introductionmentioning

confidence: 99%

“…The method presented in this study is based on a system that evolved from recent research conducted under a National Academies of Science sponsored Strategic Highway Research Program (SHRP-2) [12]. The GPR equipment used in this study is called the rolling density meter (RDM), which uses similar antenna to that presented in [12], but also applied in a 3 channel array to obtain some of the benefits in coverage explained in [11] where multiple antenna pairs are used in each pass.…”

Section: Introductionmentioning

confidence: 99%

“…Since a higher proportion of air in the asphalt creates a lower electrical impedance mismatch, the dielectric constant can be empirically related to the relative ratio of pore volume for each specific asphalt mix using core calibration [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Asphalt Pavement Compaction Assessment Using Ground Penetrating Radar-Arrays

Hoegh

Dai

2017

Congress on Technical Advancement 2017

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Air void content is a crucial parameter affecting long term pavement performance. Ground Penetrating Radar (GPR) offers a nondestructive method of determining relative asphalt air void content cheaply, quickly, and over an entire project. Previous implementations of GPR for the determination of air void content, including demonstrations as part of a recent SHRP2 study, were mostly positive, but suggested the need for a testing protocol. To explore various survey methodologies, a large-scale case study was conducted on US HWY 52 in Minnesota using the Rolling Density Meter (RDM), a commercially available device developed specifically for air void analysis in asphalt pavements. The lessons learned from the SHRP2 studies and initial Minnesota pilot projects were used on a full coverage trial implementation. The full coverage trial allowed for determination of the potential of the technology for improved QA/QC and resulted in development of best practice recommendations. This paper illustrates information provided by the full coverage data and outlines recommendations related to survey coverage, data file standardization and organization, verification of location and GPR measurements, and a rigid core collection procedure. The application of these recommendations allow an RDM crew to collect valuable relative compaction data for real time feedback without interfering with paving operations or traffic closures. Additionally, core calibration can be performed after surveying to convert data to air void content and project data analysis can be used to determine the construction practices most crucial to achieving sufficient compaction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Asphalt Pavement Compaction Assessment Using Ground Penetrating Radar-Arrays

Hoegh

Dai

2017

Congress on Technical Advancement 2017

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“…On the other hand, VIM below 3%, it can be very susceptible to permanent deformation. Air void content is one of the most important characteristics of in-place asphalt concrete, substantially affecting early deterioration and long term performance [8]. Various forms of asphalt pavement distress, such as rutting, shoving and bleeding, can be attributed, in many cases, to low air voids in the mixtures during production and placement.…”

Section: Figure 2 Unit Weight Of Acwc At Various Latex-bitumen Contentsmentioning

confidence: 99%

Improving the physical properties of asphalt concrete wearing course using latex DRC60

Siswanto¹

2016

AIP Conference Proceedings

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The effect of the electric fields on crystalline structure and functional group of mendong fiber (Fimbristylis globulosa) AIP Conference Proceedings 1778, 030007 (2016) Abstract. Road deterioration has been a significant problem in Indonesia. To minimize this deterioration and it is necessary to pay extra attention to material selection and one solution is to formulate an asphalt mix that has a high physical properties and one way to do this is to use latex as an additive. The purpose of this experimental study was to investigate the effect of latex DRC 60 on the physical properties of asphalt concrete wearing course (ACWC). The Indonesian National Standards, ASTM and AASHTO were used and all test results had to meet their standards. Four levels of latex content were investigated in this study, namely, 0%, 2%, 4% and 6% by weight of latex-bitumen blend. The result of the tests made on the ACWC blends indicated that the addition of latex changed the physical properties of ACWC. Unit weight and voids filled with bitumen (VFB) increased with the increase in latex content, suggesting that the bitumen-latex mix are more durable than that without latex. The addition of latex decreased the Voids in mix (VIM) and the Voids in mineral aggregate (VMA) of ACWC. The best asphalt mix was that with 4% latex.

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Curvelet transform-based identification of void diseases in ballastless track by ground-penetrating radar

Yang

Zhao

2019

Struct Control Health Monit

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Summary Void disease caused by construction quality and external loads contributes to the failure of reinforced concrete (RC) structures. Ground‐penetrating radars have been used for various applications to detect void diseases beneath RC. However, interferences, such as strong reinforcement bar (rebar) reflection and multiple waves, complicate the identification of internal void diseases in RC. On the basis of these problems, we consider the ballastless track of high‐speed railways as a research object and propose a void‐disease identification algorithm based on the directional features of target echoes. First, typical target echo models of rebar and void in RC were built, and the principal directional features of two kinds of target echoes were discussed. And, then, on the basis of differences between rebar and void echoes in direction, a horizontal filter was constructed to identify the void diseases. Finally, the reliability and robustness of the proposed algorithm were verified through forward simulation and field experiments. Results show that horizontal filters can effectively eliminate principal components in the asymptote direction of rebar echoes, reserve principal components in the horizontal direction of void echoes, and implement void disease detection and identification. This study promotes the application of ground‐penetrating radars to detect ballastless track subgrade diseases in high‐speed railways.

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Evaluating asphalt concrete air void variation via GPR antenna array data

Cited by 50 publications

References 11 publications

Asphalt Pavement Compaction Assessment Using Ground Penetrating Radar-Arrays

Asphalt Pavement Compaction Assessment Using Ground Penetrating Radar-Arrays

Improving the physical properties of asphalt concrete wearing course using latex DRC60

Curvelet transform-based identification of void diseases in ballastless track by ground-penetrating radar

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