The benefits of using Alkali Resistant Glass Fibre in concrete applications are becoming increasingly well known and consequently their use is becoming widespread:
- Range of glass fibres available to sort all applications: from “low integrity” fibres designed to break down into large numbers of individual filaments or small bundles of filaments to high integrity fibres which maintain their integrity during mixing.
- Glass Fibres are inorganic and thus give an excellent fibre concrete bond.
- Glass has a similar density to concrete which ensures even distribution without the tendency for fibres to sink or float.
- Glass Fibres have a high elastic modulus (74GN/m2) considerably higher than that of the concrete.
- AR Glass fibres because of their zirconia content are alkali resistant. Concrete
made with OPC has a high alkalinity which attacks ordinary E glass fibres (as used with polyester resins GRP). The higher the zirconia content the higher the resistance. NEG AR Glass fibre contains a minimum of 19% zirconia.
- AR Glass fibres can be supplied as chopped strands or in roving form. When roving is used special chopping equipment is available to cut and dispense known quantities of fibre directly into a batching plant or truck mixer. Chopped strands can either be weighed and dispensed directly or again can be automatically weighed and dispensed using a “Chopped Fibre Feeder”.
- AR Glass Fibres do not rot or corrode.
- NEG AR Glass fibres are not seen in the surface of concrete or render, when trowelled they lie flat unlike synthetic or metallic fibres.