Patent ID: 9512038
Filing Date: 2016-12-06
CPC Classification: B28B,C04B,Y02P

Claim Text:
1. A method of forming a shaped article having a matrix containing sintered fly ash, the method comprising the steps of: providing in a mould a mixture containing a fly ash composition comprising fly ash and a plasticising agent, the fly ash composition being in a powder form having an average particle size of less than 50 μm (micron), and wherein the fly ash composition includes greater than 70% fly ash by dry weight of the fly ash composition, and wherein the plasticising agent being capable of binding the fly ash particles in the fly ash composition together on pressing of the fly ash composition; pressing the particulate fly ash mixture by uniaxial pressing at a pressure of greater than 200 kg/cm firing the green article to sinter the fly ash; wherein the mixture has substantially no green strength prior to pressing the mixture.