Lightweight aggregate using fly ash and / or stone dust sludge and method for producing the same

摘要

The present invention relates to a lightweight aggregate using fly ash and / or a stone sludge and a method for producing the same.;The lightweight aggregate according to the present invention can be produced by adding water to fly ash, stone dust, or a mixture thereof, kneading it with a slurry, molding it into a predetermined size, drying it, and firing it at a temperature of 1100 to 1330C in air or in a reducing atmosphere do. It is also possible to add at least one kind of calcite, dolomite, montmorillonite and hematite as a foaming agent in an amount of 3 to 10 parts by weight to 100 parts by weight of fly ash, stone sludge or a mixture thereof.;According to the present invention, it is possible to provide a lightweight aggregate having excellent properties at a low cost, and at the same time, it is possible to obtain resource saving effect and waste treatment effect by recycling waste.