Experimental investigation of corroded steel anchorages in strain resilient ce- mentitious composites

Author(s): Souzana P. Tastani, Christos Dakidis
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 263-270
Total Pages: 8
Language : English

Abstract: In reinforced concrete, corrosion of steel results in rust of higher volume as per the consumed metal. When exceeding a certain amount of concentration, rust generates bursting pressure to concrete cover in a similar manner to the radial bond component. In the case of a corroded anchorage, both rust and bond radial pressures are balanced by concrete cover hoop tension. Given the brittleness of concrete in tension, the exhaustion of its tensile strength results in abrupt cover spitting associated with bond strength deterioration. Strain resilient cementitious composites (SRCC) would be a promising alternative in delaying corrosion due to the control against crack initiation and widening provided by the dense fiber network. In this paper bond of corroded reinforcement in SRCC is experimentally investigated by considering short anchorages (5Db, bar diameter Db=10mm), developed in the shear span and in the tension zone of a four-point bending beam. Of the nine specimens, five were made from SRCC and four were casted as reference (same particle composition but without fibers). From both batches some specimens were subjected to accelerated corrosion and the rest were left uncorroded (control). The experimental results are assessed in terms of corrosion (rate and induced damage) and mechanical response.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00