Evaluating the Effect of Calcination and Grinding of Corn Stalk Ash on Pozzolanic Potential for Sustainable Cement-Based Materials

Table 2

Fratini test results.

Ash sample	[OH] mmol/l	[CaO] mmol/l	Theoretical max [CaO] =  mmol/l	[CaO] reduction %
CS400	45.5	1.64	11.5	85.7
CS500	36.0	1.13	16.7	93.2
CS600	52.0	2.37	9.5	75.0
CS700	57.2	3.91	8.3	52.9
CS800	64.4	5.20	7.1	26.6