What are the main rocks in construction?

What type of rock is limestone ?

Is limestone soft or hard?

What type of rock is marble?

Is marble harder or softer than limestone?

How is granite formed?

How does calcium carbonate break down?

What is the equation for thermal decomposition of caco3.?

How is cement made?

How is concrete made?

Reinforced concrete is a ...

Concrete is strong...

Concrete is weak...

How is this problems overcome?