Measurement of Pozzolanic Activity Index of Scoria, Pumice, and Rice Husk Ash as Potential Supplementary Cementitious Materials for Portland Cement

Table 2

Sample designation and notation.

Calcination temperature (°C)	Sample designation
	Scoria	Pumice	Rice husk ash (RHA)
900	S 900	P 900	RHA 900
800	S 800	P 800	RHA 800
700	S 700	P 700	RHA 700
600	S 600	P 600	RHA 600
Uncontrolled condition			RHA-uc^#
Natural	S-	P-

scoria and pumice; in an uncontrolled condition.