Utilization of Sandy Soil as the Primary Raw Material in Production of Unfired Bricks

Table 4

Effect of water immersion aging on compressive strength of designed mixes.

Mix code	C25	C20GG5	C15GG10	C10GG10Q5	C8GG10Q5G2	C8GG10Q3G4
Compressive strength at 28 days (MPa)	24.45	25.14	26.59	28.13	31.58	26.41
Compressive strength after water immersion (MPa)	21.03	22.12	24.46	26.72	30.62	20.86
Coefficient of softening	0.86	0.88	0.92	0.95	0.97	0.79