Mechanical and Durability Properties of Concrete Made with Used Foundry Sand as Fine Aggregate

Table 4

Experimental and computed compressive strength.

Mixtures designation	Experimental compressive strength (N/mm^2)				Compressive strength computed using ACI 209 (Type 1) (N/mm^2)
	7 days	28 days	90 days	180 days	90 days	180 days
CM	21.54	33.14	37.24	37.29	37.05	37.99
FS 10%	21.16	33.24	36.98	36.55	37.16	38.11
FS 20%	21.17	32.58	36.17	36.12	36.42	37.35
FS 30%	20.30	31.24	34.01	34.53	34.93	35.82
FS 40%	19.41	29.48	31.83	31.43	32.96	33.80
FS 50%	16.38	25.23	27.54	27.98	28.17	28.89