Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance: Research Summary

Schwartz, Charles W.; Maryland. State Highway Administration

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Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance: Research Summary

2017-09-01
By Schwartz, Charles W.

[PDF-138.94 KB]

English

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Details:

Creators:

Schwartz, Charles W.
Corporate Creators:

Maryland. State Highway Administration
Subject/TRT Terms:

[+]

Compaction Deflectometers Modulus Of Resilience Nuclear Density Gages Paving Quality Assurance Soil Compaction
Publication/ Report Number:

MD-17-TPF-5-285
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Research summary
Corporate Publisher:

Maryland. State Highway Administration. Research Division
Abstract:

The mechanistic-empirical pavement design method requires the elastic resilient modulus as the key input for characterization of geomaterials. Current density-based QA procedures do not measure resilient modulus. Additionally, the density-based methods do not incorporate the stiffness changes in unconventional materials over time due to moisture content changes or curing. The high costs associated with the radiation-safe operation of nuclear density gauges (NDG) also encourage the search for an alternative procedure. The Lightweight Deflectometer (LWD) is a portable device that can be used to measure the surface modulus of unbound layers directly in the field. LWDs are being employed for pavement construction QA in a few states but their broader implementation has been hampered by the lack of a widely recognized standard for interpreting the measured stiffness data obtained.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:e2b2e7487187d2c5f056e1830fda0179157193f0eb65ecf989a5ada6c739fc9f
Download URL:

https://rosap.ntl.bts.gov/view/dot/32864/dot_32864_DS1.pdf
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Standardizing Lightweight Deflectometer Modulus Measurements for Compaction Quality Assurance: Research Summary

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