Use of Factory-Waste Shingles and Cement Kiln Dust to Enhance the Performance of Soil Used in Road Works

Table 2

Chemical compositions of the different CKD.

Chemical Composition	CKD1	CKD2	CKD3
Silicon Dioxide, (SiO2)	18.56	9.93	19.30
Aluminum Oxide, (Al2O3)	5.51	3.38	5.02
Ferric Oxide, (Fe2O3)	2.35	2.08	2.58
Calcium Oxide, (CaO)	60.07	51.32	60.98
Magnesium Oxide, (MgO)	2.37	1.60	2.64
Sodium Oxide, (Na2O)	0.23	0.23	0.30
Potassium Oxide, (K2O)	4.11	3.67	1.18
Phosphorus Oxide, (P2O5)	0.14	0.09	0.16
Titanium Oxide, (TiO2)	0.21	0.21	0.25
Chloride, (Cl)	2.39	—	—
Sulphur Trioxide, (SO3)	3.96	18.14	4.35
Loss On Ignition	15.23	—	3.10