Limestone

Limestone is a rock that is mainly made of calcium carbonate

Limestone is widely used in building.

Limestone breaks down when we heat it strongly (thermal decomposition) to make quicklime and carbon dioxide

Limestone - calcium carbonate = CaCO3

Quicklime - Calcium oxide = CaO

Slaked lime - Calcium hyroxide - Ca(OH)2

To make buildings

Mix sand, sodium carbonate and powdered limestone at a high temperature to make glass

Powdered limestone and powdered clay mixed and heated makes cement. Also cement powder with water, sand and crushed rock mixed together makes concrete.

Neutralise fields

Used in the blast furnace

Slaked Lime, Sand and Water mixed creates Mortar