Fly ash is a by-product of coal combustion in power stations. Although fly ash offers environmental advantages, it also improves the overall performance and quality of concrete. Flyash affects the plastic properties of concrete by improving workability, reducing water demand, controlling bleeding, and lowering heat of hydration. Flyash increases strength development at later ages, reduces corrosion of reinforcing steel, and generally improves resistance to chemical attack and mobility through a reduction in permeability. Grade 1 Fly Ash is recommended for use in virtually all conventional concrete applications.
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Grade 1 Fly Ash
Grade 1 Fly Ash is a supplementary cementitious material that delivers improved later-age strength, workability and enhances the durability properties of concrete. It is commonly used as a 20% – 30% cement replacement in concrete. Grade 1 Fly Ash is used as a single product or may be blended to produce a Fly Ash Blended Cement. Grade 1 Fly Ash is recommended for use in virtually all conventional concrete applications.
Special Grade Ash
Special Grade Ash (Ultra Fine) is a high performance fly ash product that both increases the density and reduces the permeability of concrete by providing a filler effect and a reactive cementitious material. It is particularly effective for providing water tightness in higher strength and high durability applications. Cement Australia markets Special Grade Ash under the brand Kaolite HPA.