The Effect of Variation of Molarity of Alkali Activator and Fine Aggregate Content on the Compressive Strength of the Fly Ash: Palm Oil Fuel Ash Based Geopolymer Mortar

Table 5

Development of compressive strength for different mix designs.

Designation	Compressive strength (N/mm^2)
	Three days	SD	Seven days	SD	14 days	SD	28 days	SD
M 1	20.75	0.63	23.34	0.34	26.83	0.23	27.80	0.40
M 2	20.04	0.28	22.03	0.97	24.02	0.35	25.10	0.50
M 3	18.14	0.22	19.91	0.20	24.67	0.13	25.70	0.20
M 4	19.14	1.07	21.01	0.20	24.19	0.51	25.20	0.60
M 5	17.59	1.10	19.56	0.54	22.33	0.86	23.40	0.80
M 6	14.75	1.18	17.76	0.63	19.36	0.25	20.50	0.70
M 7	21.56	0.14	23.02	0.39	25.03	0.23	26.10	0.25
M 8	21.45	1.00	22.90	1.21	24.90	0.97	26.00	1.06
M 9	20.81	0.31	22.50	0.31	25.00	1.12	26.10	0.58
M 10	17.22	0.26	20.08	0.26	22.94	0.77	24.00	0.43
M 11	21.28	0.64	23.10	0.70	24.92	0.75	26.00	0.60
M 12	14.46	0.69	16.88	0.72	20.72	0.71	21.80	0.70