The Effect of Different Parameters on the Development of Compressive Strength of Oil Palm Shell Geopolymer Concrete

Table 4

Type of chemicals used for pretreatment of OPS aggregates.

SI	Pretreatment methods	Mass proportion in kg of solution (gr)			Designation
		Solid	Liquid	Water
1	Pretreated in 5% of 14 M sodium hydroxide solution	21.6	—	978.4	A1
2	Pretreated in 20% of 14 M sodium hydroxide solution	86.2	—	913.8	A2
3	Pretreated in 50% of 14 M sodium hydroxide solution	215.5	—	784.5	A3
4	Pretreated in 5% of 14 M potassium hydroxide solution	28.1	—	971.9	B1
5	Pretreated in 20% of 14 M potassium hydroxide solution	112.2	—	887.8	B2
6	Pretreated in 50% of 14 M potassium hydroxide solution	280.5	—	719.5	B3
7	Pretreated in 5% of sodium silicate solution	—	50.0	950.0	C1
8	Pretreated in 20% of sodium silicate solution	—	200.0	800.0	C2
9	Pretreated in 50% of sodium silicate solution	—	500.0	500.0	C3
10	Pretreated in 5% of PVA solution	5.0	—	995.0	D1
11	Pretreated in 20% of PVA solution	20.0	—	980.0	D2
12	Pretreated in 50% of PVA solution	50.0	—	950.0	D3
13	Without any pretreatment	—	—	—	E