AUTOGENEOUS SELF HEALING OF HIGH PERFORMANCE FIBRE REINFORCED CEMENTITIOUS COMPOSITES

Author(s): L. Ferrara, M. Geminiani, R. Gorlezza, V. Krelani, M. Roig-Flores, G. Sanchez-Arevalo and P. Serna Ros
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 71-78
Total Pages: 8
Language: English

Abstract: In this paper the results are shown of a thorough characterization of the self-healing capacity of High Performance Fibre Reinforced Cementitious Composites (HPFRCCs). In detail, the capacity of the material to completely or partially re-seal cracks will be investigated, as a function of its composition, maximum crack opening and exposure conditions. The topic has been investigated including the effect of different flow-induced alignment of fibres, which can result into an either a strain hardening or softening behaviour, whether the material is stressed parallel or perpendicularly to the fibres. Specimens were initially pre-cracked in 4-point bending and up to different values of crack openings, and submitted to different exposure conditions, including water immersion, exposure to humid or dry air, and wet-and-dry cycles. After scheduled exposure times, from one to six months, specimens were tested up to failure according to the same test set-up and outcomes of the selfhealing, if any, were quantified in terms of recovery of stiffness, strength and ductility. In a durability-based design framework, self-healing indices to quantify the recovery of mechanical proper-ties were also defined and their significance checked.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00