Utilization of Clay and Fly Ash from Waste Industries Produced Lightweight Concrete Block for Load Bearing Wall

Abstract

This research gained to using fly ash and silt from factories instead of cement, which reduced the amount of cement for production of lightweight aggregate concrete block. Calcium hydroxide (Ca(OH)2) and sodium hydroxide (NaOH) were catalysts, which added for some reactions, such as hydration, pozzolanic, and geopolymerization reaction. Ca2+, Si2+, O2-, OH- and Na2+ were increase ionization from the reactions. The formulation was 80% by weight of fly ash from paper factories and 5 molar of sodium hydroxide solution, which gained compressive strength 13.70 MPa and density 1,497 kg/m3 at 60 day of incubation. There may be available in general concrete industries.