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

Table 5

Mix proportion and compressive strength of corn stalk ash at different grinding times (w/c ratio = 0.4).

s	(%), CSA	7 days compressive strength (MPa)	PAI	28 days compressive strength (MPa)	PAI
M0	0	35.25	100.0	39	100.0
G0	10	11	31.2	25.2	64.6
G30	10	25.51	75.2	37.5	96.8
G60	10	26.93	76.4	38.25	98.1
G120	10	27.25	77.3	42.25	108.3
G240	10	30.5	86.5	42.75	109.6