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Table 3 Physical and chemical specifications of the aggregates

From: Eco-friendly High-Strength Refractory Concrete Containing Calcium Alumina Cement by Reusing Granite Waste as Aggregate

Component Standard sand (ASTM C146, 2004) Used silica sand Used granite waste (GW)
SiO2 96–98.1 97–99 91.18
Fe2O3 0.2–0.7 0.2–0.6 1.9
Al2O3 0.51–1.63 0.4–1.7 0.22
CaO 0.4–0.7 0.07–0.2 0.53
Na2O 0.03–0.8 0–0.1 0.08
K2O 0.02–0.08 0.02–0.06 1.13
MgO 1.82
TiO2 0.05
P2O5 0.04
MnO 0.11
SO3 0.37
Cl 0.05 < 
LOI 0.01–0.35 2.72