How to make cement
Cement is the mixture of limestone, clay, sand and gypsum.
limestone
LImeatone –Limestone (calcium carbonate CaCO 3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO 3
CLAY
Clay – A type of fine-grained natural clay material that consists of clay minerals [1] (hydrous aluminum phyllosilicates, such as kaolinite, Al2Si2O5(OH)4). Most pure clay minerals are white or light in color, but natural clays show a va
riety of colors from impurities, such as red or brown color from small amounts of iron oxide.
Gypsum — Gypsum is a soft sulphate mineral composed of calcium sulphate dihydrate, with the chemical formula CaSO₄·2H₂O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk. Gypsum also crystallizes as translucent crystals of selenite.