New building materials from fly ash-based lightweight inorganic polymer

A lightweight inorganic polymer is produced from Class F fly ash, metakaolinite and lightweight aggregate. This inorganic material is activated using small amounts of sodium hydroxide and sodium silicate solution. Processing parameters including the amounts of chemical activator and various curing conditions, such as curing temperature, curing time and moisture, are investigated. Compressive strength, water absorption rate and oven-dry density of each sample are measured and compared against the specifications of ASTM C90.