limestone and building materials

building materials
limestone is heated with clay to make cement. cement is mixed with sand to make mortar. mortar is mixed with sand and aggregate to make concrete.
limestone: widely available, cheaper than granite/marble, easy rock to cut, more hardwearing than marble, doesn't rot when it gets wet. can't be gnawed away by insects/rodents. fire-resistant.
concrete: doesn't rot when it gets wet, can't be gnawed by insects/rodents, fire-resistant, doesn't corrode, stronger when reinforced with steel bars
cement: can't be gnawed by insects/rodents, fire resistant, doesn't rot when wet 

calcium carbonate

• limestone is made up of mainly calcium carbonate (CaCO3)
• can be decomposed by heating (thermal decomposition) to make calcium oxide and carbon dioxide
• - magnesium, copper, zinc, calcium and…