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

Table 2

Chemical property of the cement and foundry sand (FS).

Chemical composition	Cement	FS
	% by mass	% by mass
Lime (as CaO)	62-63	0.22
Soluble silica (as SiO2)	20-21	87.48
Alumina (as Al2O3)	5.2–5.6	4.93
Iron oxide (as Fe2O3)	4.4–4.8	1.31
Magnesia (as MgO)	0.5–0.7	0.18
Sulphur calculated as sulphuric anhydride (as SO3)	2.4–2.8	0.07
Loss on ignition (LOI)	1.5–2.5	5.81