Details:

Creators:
Maser, Kenneth R. ; Puccinelli, J.
Maser, Kenneth R. ; Puccinelli, J. Less -
Corporate Creators:
INFRASENSE, Inc.
Corporate Contributors:
Montana. Dept. of Transportation. Research Programs ; United States. Federal Highway Administration
Montana. Dept. of Transportation. Research Programs ; United States. Federal Highway Administration Less -
Subject/TRT Terms:
[+]
Field Studies Ground Penetrating Radar
Publication/ Report Number:
FHWA/MT-09-005/8201
DOI:
https://doi.org/10.21949/1518205
Resource Type:
Tech Report
Geographical Coverage:
Montana
Corporate Publisher:
Montana. Dept. of Transportation. Research Programs
Abstract:
The objective of this work is to evaluate the feasibility of expanding the MDT's Ground Penetrating Radar (GPR) program to a broader range of pavement evaluation activities. Currently, MDT uses GPR in conjunction with its Falling Weight Deflectometer (FWD) data collection program to provide layer thickness data for backcalculation. This program has included a review of literature and software dealing with pavement applications of GPR, a survey of state highway agency (SHA) use of GPR for pavement applications, a review of MDT's GPR program, and a review of MDT's pavement structures, environment, and pavement management, and rehabilitation practices. A detailed review of 47 documented studies shows that GPR pavement thickness measurements typically fall within 2-10% of core values for the bound layers. Most of these studies have used a 1.0 GHz horn antenna (vs. the 2.0 GHz antenna currently used by MDT). Accuracy of the unbound material is less precisely documented. The survey of SHA GPR practice supports the application of GPR for pavement thickness measurements—some agencies use GPR on a regular basis, while other use GPR on a project-specific basis. The application of GPR for measuring density of new AC pavement is currently being developed by Texas and Florida DOT's. Montana's pavement network is 97% AC, with mostly aggregate base but some areas with cement-treated base, and maintenance is typically carried out using chip seals. Based on an evaluation of MDT's rehabilitation and

reconstruction practices, it appears that the GPR program can be expanded to provide useful information for the following applications: (a) calculation of structural number for pavement reconstruction and rehabilitation design; (b) insuring proper depth control for mill and fill rehabilitation, and cold in-place recycling; (c) improved structural capacity calculation for network level evaluation; and (d) quality assurance of new pavement thickness and density. In order to investigate the feasibility and value of these

program expansions, it is recommended that a field evaluation project be designed and implemented to evaluate the accuracy of GPR pavement thickness (and density) data on Montana pavements, and to correlate these findings with the accuracy requirements of the individual applications.


Format:
PDF
Funding:
HWY-308813, RP Project # - 8201
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:5db13fb34d39889ad31376bc8568fd5ebe1869ba7a7b347d4685f10f6932bb7b
Download URL:
https://rosap.ntl.bts.gov/view/dot/24866/dot_24866_DS1.pdf
File Type:

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