Cone penetrometer equipped with piezoelectric sensors for measurement of soil stiffness in highway pavement : executive summary report.
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2005-11-01
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Edition:Executive summary report; Nov. 2005.
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Abstract:The stiffness (elastic modulus and shear modulus) and Poisson’s ratio of the base and
sublayers are important parameters in the design and quality assurance during construction of
highway pavements. During and after the construction of a pavement, it is very important and
cost-effective to have a mobile and automated system that can measure the stiffness and
Poisson’s ratio of in-situ compacted soils accurately and quickly. The new highway construction
guide proposed by AASHTO (American Association for State Highway and Transportation
Officials) recommends such measurements be conducted. The final report for NCHRP 1-37A
considers such measurements as crucial. The currently used techniques such as CBR (California
Bearing Ratio), resilient modulus, DCP (Dynamic Cone Penerometer) and FWD (Falling Weight
Deflectometer) tests have limitations that can not satisfy all the requirements for design and
quality assurance of highway pavements.
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