Evaluation Of Fracture Parameters Of Bond In
Stone Masonry Units Bound With Fibre
Reinforced Mortar
Author(s)
M. T. Islam & V. Bindiganavile
Abstract
This paper evaluates the fracture parameters of bond in stone masonry units
bound with plain and fibre reinforced mortar. Sandstone blocks were joined
together with a modern Type S mortar conforming to CSA A 179-04. A
companion series was examined employing a hydraulic lime mortar used in the
repointing of historical masonry. Based on a previous study, polypropylene
micro fibres were incorporated at up to 0.5% by volume to achieve superior
crack growth resistance. The study reports relevant fracture parameters including
the critical stress intensity factor, the critical crack length and the critical crack
mouth opening displacements. The masonry units were subjected to quasi static
flexure as per ASTM and dynamic bending via a drop weight impact machine
which generated stress rates up to 107 kPa/s. The results show an improvement in
the bond strength, but varied fracture performance between the Type S and
hydraulic lime mortars, as a result of fibre reinforcement.
Keywords: masonry bond, fracture analysis, fibre reinforced mortar.
Keywords
masonry bond, fracture analysis, fibre reinforced mortar
Related Book
Other papers in this volume
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