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Pro109-1

USE OF ULTRASONIC P- AND S-WAVES TRANSMISSION VELOCITY FOR THE EARLY AGE BEHAVIOUR OF ECO- CONCRETE



Author(s): Jérôme Carette, Stéphanie Staquet
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 394-401
Total Pages: 8
Language : English


Abstract: The well established ultrasonic pulse velocity method has been widely used in the past
decades for monitoring the setting process, compressive strength and dynamic elastic
properties of concrete. In this study, the simultaneous monitoring of P-wave and S-wave
transmission velocity through cement-based materials samples allows a clear picture of their
early age behaviour. It is observed that this method can be used to determine the initial and
final setting times, as well as the early age compressive strength and tensile strength
evolution. A novel methodology for the determination of the activation energy from such
measurements is proposed. The results of a large experimental campaign are presented,
discussing the effect of parameters such as w/c ratio, presence of various mineral additions in
terms of nature and substitution rate, presence of aggregates, and temperature. It is shown that
the combination of P-waves and S-waves transmission velocity provides a detailed picture of
the setting process and hardening of all tested cement-based materials. It also provides an
effective alternative to the isothermal calorimetry measurement for the determination of the
apparent activation energy, applicable at the concrete scale.


Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00


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