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Title: Compaction and shear failure of refractory mortars – effects of porosity and binder hardening
Authors: Andreev, Kirill ×
Verstrynge, Els
Wevers, Martine #
Issue Date: 2016
Publisher: Elsevier Science Publishers
Series Title: Journal of the European Ceramic Society
Article number: dx.doi.org/10.1016/j.jeurceramsoc.2016.08.040
Abstract: With the aim to correlate the global properties of refractory mortars with the micro-mechanical processes, a series of uni-axial compression and shear tests was conducted. The test program was developed with the view that the shear grain slip and cracks are frequent failure mechanism under compressive loads. The micro-structural changes during compression were monitored by X-ray micro focus computed tomography. Discrete element modelling was used to highlight the effects of individual factors of influence. Mortars with a water glass binder of different maturity were tested. In compression the mortars demonstrated cracking and pore closure. Shear tests showed that the failure process consists of multiple local failure events. The combined effects of the porosity and immature binder promote increased tendency for crack branching and arrest. This results in low shear strength and high compressibility. Cohesion and interlocking between the grains prevents crack branching and increases the stiffness and the strength.
ISSN: 0955-2219
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Structural Composites and Alloys, Integrity and Nondestructive Testing
Building Materials and Building Technology Section
× corresponding author
# (joint) last author

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