Journal of Engineering / 2016 / Article / Tab 1

Research Article

Early and Late Strength Characterization of Portland Cement Containing Calcined Low-Grade Kaolin Clay

Table 1

Properties of Portland cement and raw clay.

PropertyPCRaw clay

Physical
 Fineness (m2/kg)401.7
 Specific gravity3.13
Chemical
 SiO2 (%)20.4959.7
 Al2O3 (%)4.2625.53
 Fe2O3 (%)3.145.22
 CaO (%)63.480.16
 MgO (%)2.111.37
 SO3 (%)2.90.07
 Na2O + K2O (%)0.492.41
 LOI (%)2.24.5
Mineralogy
 C3S (%)56
 C2S (%)15
 C3A (%)6
 C4AF (%)9
Particle size distribution (%)
 Clay (<2 μm)28.4
 Silt (2 μm–0.05 mm)19.5
 Sand (0.05 mm–2 mm)52
 Gravel (>2 mm)0.1

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