These strands can be used at the nozzle for shot-creating, offer an alternative to chopper gun spraying. To the right a bundle of fibres, aligned & bonded together, as they can be randomly aligned in a mould. At the top, three pre-weakened strands, below them one that has been coated with a cement mix, three fibres broken off from such a strand. These strands can be precoated and broken off as fibres ready for moulding – illustrated below. Preparation of the non-woven fabric A special machine has been designed and developed to pre-weaken strands of fabric. Pre-coated fibres can be moulded into porous or dense products. Pre-weakened strands are dip coated with the chosen matrix, the excess material removed by pulling the strand through a die, which is then broken off at the pre-determined fibre length. Non woven textile reinforced composite concrete is a method that allows a high volume fraction of fibres to be reached in hydraulic matrices, for example cement slurries or gypsum plaster, by avoiding the need for mixing. This paper describes the incorporation of non-woven textiles in concrete.
Introduction The incorporation of woven fabrics in concrete has been known for some time (Hill et al and Schütt et al).
Box 5072 Horizon 1730 Roodepoort, South Africa, email: 1. Akers, **Bob Tait and ***Don Hourahane *AC Consulting, Vorderdorfstrasse 31, CH-8753 Mollis, Switzerland, email: **Department of Mechanical Engineering and Materials Engineering, UCT, Cape Town 7000, South Africa, email: ***Textile Concrete, P.O. NON-WOVEN TEXTILE REINFORCED COMPOSITE CONCRETE *Stephen A.S.
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