Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance

Schwartz, Charles W.; Afsharikia, Zahra; Khosravifar, Sadaf; University of Maryland (College Park, Md.). Dept. of Civil and Environmental Engineering

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Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance

2017-09-01
By Schwartz, Charles W. ; Afsharikia, Zahra ; Khosravifar, Sadaf

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English

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Creators:

Schwartz, Charles W. ; Afsharikia, Zahra ; Khosravifar, Sadaf

Schwartz, Charles W. ; Afsharikia, Zahra ; Khosravifar, Sadaf Less -
Corporate Creators:

University of Maryland (College Park, Md.). Dept. of Civil and Environmental Engineering
Corporate Contributors:

Maryland. State Highway Administration. Office of Policy & Research
Subject/TRT Terms:

[+]

Compaction Deflectometers Geomaterials Geotechnical Engineering Light Weight Deflectometer (LWD) Modulus Measurement Modulus Of Resilience Moisture Content Moisture Content Measuring Devices Quality Assurance Resilient Modulus Testing Soil Water
Publication/ Report Number:

MD-17-SHA-UM-3-20
Resource Type:

Tech Report
Geographical Coverage:

United States
TRIS Online Accession Number:

01649484
Edition:

Final Report
Corporate Publisher:

Maryland. State Highway Administration
Abstract:

To evaluate the compaction of unbound geomaterials under unsaturated conditions and replace the conventional methods with a practical modulus-based specification using LWD, this study examined three different LWDs, the Zorn ZFG 3000 LWD, Dynatest 3031 LWD, and Olson’s LWD-1. These devices were selected to represent the range of commercially available testing configurations. Following the selection, a unique large-scale controlled experimental setting was designed and constructed for preliminary investigations. In addition to evaluation of the LWDs, two non-nuclear water content measurement techniques, namely a volumetric water content sensor and a gravimetric moisture analyzer, were assessed. Additional material was collected for further routine and advanced tests in the laboratory, including compaction moisture-density relations and resilient modulus tests on samples prepared at optimum and field conditions. Lastly, the concept of LWD testing directly on the compacted Proctor mold was developed to derive the target modulus values for the field. The research findings were summarized in two modulus-based QA procedures/specifications intended for practical implementation by state DOTs and engineers. The test protocols and data interpretation procedures are in AASHTO format.
Format:

PDF
Funding:

TPF-5(285)/SP409B4P
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:d1ef89a0df44b5db8deb6655ace666efb0090d9da8bb1eb5fa8bb17e4b55f73b
Download URL:

https://rosap.ntl.bts.gov/view/dot/32862/dot_32862_DS1.pdf
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Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance

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