Abstract
Mortar slabs reinforced with monofilament polypropylene and hooked steel fibres, fibrillated polypropylene network and deformed steel bars were tested in flexure under central point loading, and continuous load-central deflection curves were obtained. The tests indicated that the highest flexural strength and toughness resulted when slabs were reinforced with polypropylene network. These slabs also exhibited multiple cracking unlike slabs reinforced with short fibres which failed mainly by a single crack.Impact tests were performed on slabs supported on four sides on a steel frame. A steel ball positioned at a predetermined height was dropped at the centre of the slabs, and deflections at different positions were measured after different numbers of blows. The results indicated that with the different types of fibre reinforcement used, the slab reinforced with hooked steel fibres exhibited the least deflection under the condition of varying numbers of blows.
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