BENDER-EXTENDER ELEMENTS FOR CHARACTERIZATION OF CEMENT PASTE AT EARLY AGES

Author(s): José Granja, Miguel Azenha
Paper category: Proceedings
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: 314-323
Total Pages: 10
Language : English

Abstract: The embedment of bender-extender elements in cement-based materials for assessment of the
early development of mechanical properties is a relatively unexplored field. This technique
provides the opportunity of embedding piezoelectric elements (emitter and receiver) into the
tested material at the fresh state, generate waves and assess the velocity of propagation. It has
the interesting feature of allowing distinct frequencies of wave to be explored at the several
stages of stiffening of the testing material, thus maximising signal intensity and facilitating
the identification of velocities. This paper presents an exploratory application of bender-
extender elements to cement paste specimens, in parallel with other established experimental
techniques, such as the Vicat needle, ultrasound pulse velocity measurements (with external
probes), measurement of E-modulus through cyclic compressive testing and continuous
assessment of the E-modulus of the cement paste through EMM-ARM. The results are
evaluated and discussed in an integrated manner and conclusions are drawn in regard to the
potential of using bender-extender elements in cement-based materials.

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