Influence of Molarity and Chemical Composition on the Development of Compressive Strength in POFA Based Geopolymer Mortar

Table 7

Comparison of the compressive strength between different molarities.

Mortar designation	Binder mix proportion	M-sand	Alkali activator	Compressive strength (MPa)
	MK/GGBS/POFA (%)	(kg/m^3)	molarity	3-day	28-day
M4	10/45/45	1532	14	36.6	40.85
M6	15/35/50	1532	14	22.15	32.5
M9	20/25/55	1532	14	37.15	41
M12	20/35/45	1532	14	43.15	48
M16	25/35/40	1532	14	33.4	37.5
M18	30/35/35	1532	14	34	40.8
M4A	10/45/45	1532	12	30.8	34.1
M6A	15/35/50	1532	12	17.2	25.8
M9A	20/25/55	1532	12	32.5	37
M12A	20/35/45	1532	12	36	41.5
M16A	25/35/40	1532	12	27.6	33
M18A	30/35/35	1532	12	31.1	35.6

Note: MK: metakaolin; GGBS: ground granulated blast furnace slag; POFA: palm oil fuel ash.