CEMENTLESS CONCRETE COMPOSITION PRODUCING METHOD WITH LIGHTWEIGHT AGGREGATE USING COAL ASH

摘要

The present invention relates to a method for producing an artificial lightweight aggregate cementless concrete composition using coal ash consisting of bottom ash and fly ash, wherein bottom ash which has a size of 5 mm or more and exhibits magnetism from among wet bottom ash buried in a heat power plant is removed, so that the cracks in concrete which occur due to expansion pressure after the corrosion of magnetic bottom ash can be prevented. Moreover, bottom ash from which particles having a size of 5 mm or more and exhibiting magnetism are removed using a magnet is used as a coarse aggregate for concrete, and fly ash, blast furnace slag fine powder, sodium silicate, and alkaline inorganic ingredients are mixed at appropriate ratios without using cement as a binder, so that polymerization is induced by means of activation and strength and workability can be ensured.