This report presents a literature review of instrumentation practices for the measurement of stresses, strains,
and deflections in pavement structures. Various types of instruments that are commonly employed in
pavement instrumentation projects are discussed, as well as the factors that influence their performance. In
a series of laboratory experiments, the performance of three different types of embedment strain gages, two
LVDTs, and one soil stress cell are investigated. These experiments are designed to evaluate the accuracy
and durability of commercially available transducers. For strain gages, the selection of an appropriate
transducer must balance compliance and measurement sensitivity. All of the strain gages tested in concrete
gave reasonable results. It was found that hermetically sealed LVDTs should be sufficient enough for robust
installations. Experiments with soil stress cells embedded in sand indicate the variability that may be expected
in the field due to installation procedures, and emphasize the need for in-soil calibrations. A set of
recommendations are provided with respect tot the sensor procurement and installation specifications for
Van Deusen, David A.; Newcomb, Dave; Labuz, Joseph F..
A Review of Instrumentation Technology for the Minnesota Road Research Project.
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