Dicalcium silicate is well known that is the major composition of clinker, which could be developed the compressive strength at late stage. This research has applied the microwave technique including using nano-silica extracted from rice husk ash (RHA) as a precursor for producing dicalcium silicate. The activation energy of 700 watts for 0, 5, 10 and 15 minutes were used to accelerate the mixed precursor (i.e. CaCO3 and nano-silica) and then were fired at 800 C for 1 hour. เขียนผล