Effect of Post-Fire Curing on the Residual Mechanical Properties of Fire-Damaged Self-Compacting Concrete

Effect of Post-Fire Curing on the Residual Mechanical Properties of Fire-Damaged Self-Compacting Concrete

Mirmomeni, M. (Monash University)
Heidarpour, A. (Monash University)
Schlangen, E. (TU Delft Materials and Environment)
Smith, S (Southern Cross University)

Saouma, V. (editor)
Bolander, J. (editor)
Landis, E. (editor)

2016

Concrete is recognized for being a fire-resistant construction material. At elevated temperatures concrete can, however, undergo considerable damage such as strength degradation, cracking, and explosive spalling. In recent decades, reuse of fire-damaged concrete structures by means of developing techniques to repair the degraded material has gained interest amongst researchers. Autogenic self-healing methods such as re-curing in water has proven to partly restore the strength of concrete. The extent of restoration is dependent upon various parameters such as concrete type, exposure temperature, and post-fire curing conditions for example. The use of selfcompacting/ consolidating concrete (SCC) has become common in the construction industry due to its high workability and low permeability. This paper presents the results of an experimental study aimed at investigating the improved mechanical properties of high temperature exposed SCC concrete by the autogenic self-healing phenomenon resulting from water re-curing. The residual mechanical properties including strength, modulus of elasticity and ultimate strain of the material upon application of different post-fire curing regimes are presented herein with special emphasis on the effect of thermal profile including exposure time, temperature and cooling rate. The experimental results confirm that the recovery of material properties in fire-damaged SCC concrete is contingent on the post-fire water curing conditions.

Post-Fire Curing
Self-Compacting Concrete
Self-Healing
Residual Strength

http://resolver.tudelft.nl/uuid:7bfa967b-3f34-49ae-b939-683e73edbc3f

https://doi.org/10.21012/FC9.027

9th International Conference on Fracture Mechanics of Concrete and Concrete Structures: Berkeley, California USA

9th International Conference on Fracture Mechanics of Concrete and Concrete Structures, 2016-05-22 → 2016-05-25, University of California, Berkeley, United States

Institutional Repository

conference paper

© 2016 M. Mirmomeni, A. Heidarpour, E. Schlangen, S Smith