Investigation and development of a non-destructive system to evaluate critical properties of asphalt pavements during the compaction process.

Schmitt, Robert L.; Faheem, Ahmed; Al-Qadi, Imad L.; University of Wisconsin--Platteville. Dept. of Civil and Environmental Engineering; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering

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Investigation and development of a non-destructive system to evaluate critical properties of asphalt pavements during the compaction process.

2013-10-01
By Schmitt, Robert L. ; Faheem, Ahmed ; Al-Qadi, Imad L.

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English

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Creators:

Schmitt, Robert L. ; Faheem, Ahmed ; Al-Qadi, Imad L.

Schmitt, Robert L. ; Faheem, Ahmed ; Al-Qadi, Imad L. Less -
Corporate Creators:

University of Wisconsin--Platteville. Dept. of Civil and Environmental Engineering ; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering

University of Wisconsin--Platteville. Dept. of Civil and Environmental Engineering ; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering Less -
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Asphalt Pavements Compaction Evaluation And Assessment Field Studies Ground Penetrating Radar Nondestructive Tests Nuclear Density Gages Seismometers Thermogravimetric Analysis
Publication/ Report Number:

0092-11-01
Resource Type:

Tech Report
Geographical Coverage:

Wisconsin
Corporate Publisher:

Wisconsin. Dept. of Transportation. Research and Library Unit ; Wisconsin Highway Research Program

Wisconsin. Dept. of Transportation. Research and Library Unit ; Wisconsin Highway Research Program Less -
Abstract:

The purpose of this report is to present findings from a two-stage investigation to develop a non-destructive system to

evaluate critical properties and characteristics of asphalt pavements during the compaction process. The first stage aligned

critical properties and characteristics with available non-destructive testing (NDT) technologies. A quantitative ranking was

created with an objective and unbiased scoring system to determine the most appropriate NDTs for field evaluation. Based

upon this ranking system, the three higher-ranked NDTs for the evaluation and selected for a field evaluation were: Infrared

Thermography (IR), Ground Penetrating Radar (GPR), and Portable Seismic Pavement Analyzer (PSPA). The nuclear

density gauge was also used in the evaluation.

The second stage of the investigation collected field data from three projects, analyzed the data using a variety of methods,

and developed an implementation plan based upon the findings. Continuous infrared (IR) thermal readings measured mat

temperature at 12 transverse offsets spaced 13 in apart, and at a 1 ft longitudinal spacing. Analysis of the data found greater

variability along centerline of the paving mat. The average nuclear density on the three projects was nearly identical,

ranging from 92.4% to 92.6%, and standard deviations of 2.21%, 1.66%, and 1.40%. The GPR density standard deviation

was about half that of nuclear density. GPR thickness among the projects had a standard deviation ranging from 0.1 to 0.2

inches. Variability closer to the pavement centerline was generally higher. Average modulus normalized at 130°F on

Project 1 was 3616 ksi, Project 2 at 3014 ksi, and Project 3 at 2530 ksi.

Data from the three projects found no definitive relationship between continuous thermal temperatures behind the paver and

final density measured by GPR and nuclear density gauge. Placement temperature did not appear to affect modulus; this

finding is limited to the three projects in this study and may not be true for all mixes placed in Wisconsin or other states.
Format:

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US Transportation Collection
Main Document Checksum:

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urn:sha256:4b635479b6f88efa43ac2f9651c52b45a14a3b8ed10565ddce72cfcf65d59b71
Download URL:

https://rosap.ntl.bts.gov/view/dot/26998/dot_26998_DS1.pdf
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Investigation and development of a non-destructive system to evaluate critical properties of asphalt pavements during the compaction process.

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