Abstract
Fly ash is an important industrial by-product, in terms of its production quantity and its influence on environment by heavy metals. But geopolymer possess excellent mechanical properties, fire resistance and chemical resistance; and geopolymer technology can also be employed for waste disposal in that it can immobilize toxic metals. We investigate which factor for a three alkaline activators influences physicochemical of inorganic binder. The alkaline activators that have been used for activating fly ash include NaOH, KOH and water-glass (sodium silicate solution). Compressive strength was measured to evaluate the characteristics of specimens for the period of 1, 3 and 7 days. And the morphology was analyzed by XRD. The microstructure of inorganic binder prepared was analyzed by FTIR. Korea Standard leaching Test (KSLT) and Toxicity Characteristic Leaching Procedure (TCLP) method are used to and examine leaching potential of inorganic binder.
