Data analysis：

Specific Gravity:2.77
Density (kg/L):2.66
Water Absorption(%):0.85
Calcium(Ca O):45.74%
Silica(Si O2):15.5%
Alumina (Al2 O3):0.78%
Iron (Fe2 O3):1.34%
Magnesium (Mg O):0.50%
Calcium Carbonate(Ca CO3):54.09%
Loss on Ignition(LO I):35.5