Cement and concrete
Thermal decomposition is a reaction where one substance breaks down on heating to give at least two new substances. Calcium carbonate (limestone) thermally decomposes when heated: Calcium carbonate -calcium oxide+calcium dioxide CaCO3- CaO + CO2
Cement is made by mixing cement,sand and small stones with water
Cement is made when limestone is heated with clay
Reinforced concrete is a composite material which has steel rods or meshes running though it. Composites contain at least two materials that can still be distinguished.
More Concrete is strong under a squashing force but weak under pulling force
If heavy loads are applied to a beam this type of concrete will bend this creates tension and compression. The tension cracks the concrete
Reinforced concrete is harder and more flexible then concrete
It is a better construction material.