Characteristic Investigations on Ethiopian Kaolinite: Effect of Calcination Temperature on Pozzolanic Activity and Specific Surface Area

Table 2

The comparison of Ethiopian kaolinite pozzolanic activity and specific surface area with the literature.

Origins of kaolinite	Calcination temperature (°C)	Suitable temperature (°C)	Test method	SSA (m^2·g^−1)	PAMK (mg of Ca(OH)2 g^−1)	Strength (MPa)	Reference
Argentina	700–800	700	Frattini	—	—	52	[6]
Greece	550–950	650	Chapelle	—	800	—	[13]
Serbia	550–700	650	Chapelle	9.18	650	—	[14]
South Africa	475–1200	650	Chapelle	—	2100	—	[21]
Switzerland	600–800	600	Frattini	24.7	—	60	[30]
Turkey	550–850	750	Frattini	—	—	66.6	[31]
France	—	650	Chapelle	17	1121	—	[32]
Portugal	750–940	850	Chapelle	10.9	1180	—	[1]
Ethiopia	575–1000	700	Chapelle	47.8	1235	—	This study