Mathematical Model of Hybrid Precast Gravity Frames for Smart Construction and Engineering

Table 4

Heavy metal content standards in cement [19].

	Cr^6+	As	Cd	Cu	Hg	Pb
Ave. (May, 2013)	10.63 mg/kg	12.87 mg/kg	1.02 mg/kg	89.03 mg/kg	0.61 mg/kg	32.84 mg/kg