Effect of Activated Temperature on Polymerization Reaction of Kaolin

Abstract

This paper presents of Effect of Activated Temperature on Polymerization Reaction of Kaolinfrom 13 locations in Thailand by mixing different alkali solution such as Na2SiO35H2O, Na2CO3,Na2HPO4, Na3PO4, KOH and NaOH. Polymerization reaction of the specimens were activated undertemperature of 40°C, 60°C and 80°C for 24 hours. Heat development and heat evolution rate duringstabilization along with chemical composition were determined by calorimetric study. From theexperiment, it was found that when increase activated temperature than total heat development andtotal heat evolution rate increase all specimens.Futhermore, it was found that almost all of specimenswith KOH have heat development and heat evolution rate more than those with NaOH at 80°Cactivated temperature except Rayong Kaolin, Ranong Kaolin, Suratthani Kaolin and Naratiwat Kaolinwhich provide similar total heat development and total heat evolution at 40°C and 60°C activatedtemperature. SiO2 / Al2O3 ratio had no effect on polymerization reaction.