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 6

Percentage of increment of compressive strength.

Equations		Mortar ID
		M1	M2	M3	M4	M5	M6	M7	M8	M9	M10	M11	M12
Three to 7 day	𝑆7−𝑆3𝑆3×100	12.5	9.9	9.8	9.8	11.2	20.4	6.8	6.8	8.1	16.6	8.6	16.8
Seven to 14 day	𝑆14−𝑆7𝑆7×100	14.9	9.0	23.9	15.1	14.2	9.0	8.8	8.8	11.1	14.3	7.9	22.7
14 to 28 day	𝑆28−𝑆14𝑆3×100	3.7	4.2	4.1	4.1	4.5	5.2	4.0	4.0	4.0	4.4	4.0	4.8

𝑆3, 𝑆7, 𝑆14, and 𝑆28 are the compressive strengths at 3, 7, 14, and 28 days, respectively.