Effects of Using Pozzolan and Portland Cement in the Treatment of Dispersive Clay

Table 3

Categorization based on pinhole test results of clay sample stabilized with pozzolan alone, cement alone, and pozzolan plus 1.5 percent cement.

Additive	Curing time
	1 day	7 days	14 days	35 days	90 days
Pozzolan 2%	D2	D2	ND4	ND3	ND3
Pozzolan 4%	ND4	ND4	ND4	ND3	ND3
Pozzolan 5%	ND3	ND3	ND3	ND3	ND2
Pozzolan 6%	ND4	ND4	ND3	ND3	ND3
Pozzolan 8%	D2	ND4	ND3	ND3	ND3
Cement 1%	ND4	ND3	ND3	ND3	ND3
Cement 2%	ND3	ND2	ND2	ND2	ND2
Cement 3%	ND3	ND2	ND1	ND1	ND1
Cement 4%	ND2	ND1	ND1	ND1	ND1
Pozzolan 2% + 1.5% cement	ND3	ND3	ND2	ND1	ND1
Pozzolan 5% + 1.5% cement	ND2	ND2	ND1	ND1	ND1
Pozzolan 8% + 1.5% cement	ND3	ND3	ND2	ND1	ND1

Note D₁ and D₂: dispersive; ND₁ and ND₂: nondispersive; ND₃ and ND₄: intermediate.