Determination of fracture energy of early age concrete through a uniaxial tensile test on an un-notched specimen

Ren, D.; Houben, L.J.M.

doi:10.3390/ma13030496

Determination of fracture energy of early age concrete through a uniaxial tensile test on an un-notched specimen

Title

Determination of fracture energy of early age concrete through a uniaxial tensile test on an un-notched specimen

Author

Ren, D. (Southwest Jiaotong University)
Houben, L.J.M. (TU Delft Pavement Engineering)

Date

2020

Abstract

Unlike the notched specimens for conventional concrete fracture tests, this paper introduces a deformation-controlled uniaxial tensile test on an un-notched specimen. The surface of the dog bone-shaped specimen is a second order parabolic curve, and the gradual change in the specimen shape does not lead to extreme stress concentrations. Another significant feature of the tension test set-up is that it is built with three hinges, to accommodate the alignment of the specimens. The specimen preparation, test conditions, and the tension test set-up are explained in detail. The fracture energy of the concrete is determined by the obtained complete softening curves. The fracture energy is found to increase with age, going towards a horizontal asymptote as concrete hardened in a tested age range of 1 day to 90 days. Moreover, the rate of development of the fracture energy was found to be higher when compared to tensile strength and stiffness.

Subject

Early age concrete
Fracture energy
Un-notched specimen
Uniaxial tensile test

To reference this document use:

http://resolver.tudelft.nl/uuid:0bcf2a0d-97d6-4b54-b873-c6306ec5571b

DOI

https://doi.org/10.3390/ma13030496

ISSN

1996-1944

Source

Materials, 13 (3), 1-15

Part of collection

Institutional Repository