DOI: 10.5593/SGEM2016/B62/S26.013


C.Baera, D.Snoeck, H.Szilagyi, C. Mircea, N. Belie
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-69-8 / ISSN 1314-2704, June 28 - July 6, 2016, Book6 Vol. 2, 91-98 pp

Structural performance under dynamic actions, apart from geometric characteristics, supports loading conditions, design methods, etc., is mainly related to the intrinsic material properties of the structural elements. Earthquake events, as typical examples of accidental dynamic loading, involve strong stress waves, induced in the structure in very short time intervals. Increased loading rates, difficult to withstand, are generated. Therefore, superior complementary characteristics, namely strength and ductility, are required in order to avoid sudden failure and, as direct consequence, casualties and economic losses.
Engineered Cementitious Composite (ECC), a unique type of mortar framed in the category of high-performance fibre-reinforced cementitious composites (HPFRCC), is defined by metal-like behaviour due to the multiple cracking patterns developed under applied loads. ECC proves an increased deformability potential and, as consequence ductility, which indicate a superior performance when subjected to dynamic actions. The multiple microcracking property of the composite, together with some specific matrix attributes and environmental conditions, also ensures an already proved self-healing potential [1], [2]. All these intrinsic material characteristics induce increased durability, considerable material and manpower reduction, improved structural performance and reduced repair and maintenance costs. Consequently, ECC is a valuable building material alternative and it is obvious that will bring a major to future sustainable development.
This paper presents the incipient evaluation of the dynamic performance of Fibre Engineered Cementitious Materials with Self-Healing potential (SH-FECM), developed using the ECC theoretical and applied design principles, in the terms of the strain rate sensitivity, which proves to be an essential and difficult to control parameter.

Keywords: microcracks, Engineered Cementitious Composites (ECC), crack control, self-healing capacity; loading rate sensitivity.