Aggregates
AssigneeNovagg Limited
InventorMichael Evans
Life of this patent
Estimating the term…
Abstract
A method of forming an aggregate. The method comprising forming a green pellet including waste glass and additive(s). The unfired pellets are coated with a refractory material and sintered such that some of the additive/additives breaks down to generate gas which is at least partially retained in the microstructure of the mixture to form pores, the additive/additives so being that upon heating the additive/additives and glass combine to produce glass ceramics.
Claims33
A method for preparing an aggregate comprising a plurality of particles, the method comprising forming a mixture comprising glass powder and an additive, forming green pellets from the mixture, coating the surface of the pellets with a refractory material and heating the pellets at a required temperature to produce a plurality of particles, the additive being such that it at least partially breaks down at the required temperature to generate gas, which gas is at least partially retained in the microstructure of the mixture to cause the formation of pores within the microstructure, the additive also being such that upon heating the additive and glass combine to produce a glass ceramic system.
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A method of producing green pellets, the method including the steps of forming a plurality of green pellets from a mixture comprising glass powder, and an additive, and a refractory material coating.
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A method for preparing aggregate particles, the method comprising forming a plurality of green pellets from a mixture comprising glass powder, and an additive, and a refractory material coating, sintering the green pellets so as to cause the pellets to expand to produce particles comprising a plurality of internal closed pores.
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Dependencies are inferred from the claim text.