Fracture characterization of multi-layer wire mesh rubberized ferrocement composite slabs by means of acoustic emission

The fracture behaviour of multi-layer ferrocement composite slabs with partial replacement of tire rubber powder as filler was investigated and characterised using acoustic emission (AE) technique. Slab specimens prepared using normal-compacting cement mortar, self-compact cementing mortar, fly ash, and rubberized self-compact cementing mortar –with varying steel mesh reinforcement layers– were statically loaded to failure to evaluate their fracture behavior. The inclusion of 10% rubber powder (by weight) was found capable of altering the failure mode of composite slabs from brittle to ductile with a slight reduction in the ultimate flexural strength, the mix which suggests performance enhancement over the existing standard practices. The measured AE parameters could distinguish different modes of fracture, signifying its usefulness in providing quantitative assessment on the stiffness change and mechanical performance of the cementitious materials under progressive damage.