Notched Beam Test for SHCC-Concrete Interface

Notched Beam Test for SHCC-Concrete Interface

Mustafa, S. (TU Delft Concrete Structures)
Harrass, Othman (Student TU Delft)
Lukovic, M. (TU Delft Concrete Structures)

Ilki, Alper (editor)
Çavunt, Derya (editor)
Çavunt, Yavuz Selim (editor)

2023

The number of hybrid concrete structures is increasing due to the need for repairing/strengthening existing structures and the development of new hybrid concrete systems. The structural response of these hybrid structures might be governed by the strength of the interface between the two concretes, making it essential to characterize the mechanical response of the interface. In this research, a notch beam tests is proposed to investigate the structural behavior of the interface. Hybrid beams consisting of Strain Hardening Cementitious Composites (SHCC) and conventional concrete are designed with a notch at mid-span and are tested under a four-point bending configuration. The effect of interface treatment (i.e. surface roughness) and the curing condition is tested using two sets of hybrid beams. The first set has three beams which are cured in sealed conditions until the day of testing and the interface is varied between smooth, profiled and roughened. The second set has two beams with smooth interface where one beam is seal cured and the other one is exposed to drying in the laboratory. The opening of the interface is visualized using Digital Image Correlation (DIC) and quantified using Linear Variable Differential Transformers (LVTDs) during testing of the hybrid beams. It is observed that increasing the roughness of the interface leads to higher load-bearing capacity and controlled opening of the interface. The beam exposed to drying showed somewhat reduced capacity, possibly due to the pre-damage caused by differential shrinkage of the two concretes.

SHCC-Concrete Hybrid Beams
Interface
Notch-Beam Test
Composite structures

http://resolver.tudelft.nl/uuid:c8059100-8551-4eea-94df-66464389a655

https://doi.org/10.1007/978-3-031-32511-3_158

Springer

2023-12-03

978-3-031-32510-6

Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2, 350

International Symposium of the International Federation for Structural Concrete, fib Symposium 2023, 2023-06-05 → 2023-06-07, Istanbul, Turkey

Lecture Notes in Civil Engineering, 2366-2557, 350 LNCE

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

conference paper

© 2023 S. Mustafa, Othman Harrass, M. Lukovic