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

Table 1

Chemical compositions of scoria, pumice, and RHA from different literatures.

Sample	SiO2; %]	Fe2O3; %]	Al2O3; %]	CaO; %]	Alkali; %]	MgO; %]	TiO2; %]	L.o.I; %]
Scoria data from different literature
Khandaker and Hossain [8]	45–50	7–10	13–15	5–8	4–6	4–6		1.25–1.5
Taha et al. [15], Yemen scoria	47–50	28–30		7–10	3–6
Taha et al. [15], Italy scoria	51.4	25.7		6.5	6.4
Njau et al. [16]	35.4	31.9		12.7	5.6
Pumice data from literature
Ismail et al. [17]	70.97	1.88	14.24	1.37	8.48	0.35	0.14	2.41
RHA data from different literature
Wansom et al. [6]	93.59	0.31	0.89	2.28	1.30		0.61
Della et al. [12] (at 700°C)	94.95	0.26	0.39	0.54	1.19	0.9	0.2	0.85