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TitleContinuous stiffness monitoring of cemented sand through resonant frequency
Author(s)Azenha, Miguel
Ferreira, Cristiana
Silva, Jacinto
Correia, A. Gomes
Aguilar, Rafael
Ramos, Luís F.
Cemented sand
Continuous monitoring
Resonant frequency
Sand (material)
Soil stabilization
Issue date2011
PublisherAmerican Society of Civil Engineers (ASCE)
JournalGeotechnical Special Publication
Abstract(s)Mixture formulation and in-situ quality control of the stabilized soils often represent difficult and challenging tasks. The present paper addresses the possibility of using a variant to a recently developed non-destructive technique for continuous monitoring of stiffness of hardening materials as a supporting means to the above-mentioned tasks. The material to be tested is placed inside a polycarbonate mold placed in simply supported conditions. The technique is based on the continuous monitoring of the first resonant frequency of this composite beam, which evolves as a consequence of the hardening of the material, and can be correlated with its E-modulus. The usefulness and potential of this experimental methodology for mixture formulation and quality control of stabilized soils is shown through a series of tests conducted on laboratory since the instant of mixing until 7 days. The conducted tests include complementary methodologies of characterization such as E-modulus measured on specimens with strain instrumentation, as well as monitoring with recourse to bender-extender elements.
TypeConference paper
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:C-TAC - Artigos em Revistas Internacionais
ISISE - Artigos em Revistas Internacionais

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