Limestone Flashcards
How is Limestone extracted?
It is quarried from the ground
It is blasted by explosives which dislodge limestone from the rock face
It it then taken by lorries to be processed
Advantages of quarrying
The quarry can be transformed into a reservoir after use
having a quarry creates new jobs
there is the possibility of using it for landfill
Disadvantages of quarrying
The landscape is scarred
Noise pollution disturbs people and scares animals
there is traffic from the lorries
kills animals habitats
what did builders use before cement mortar was invented?
lime mortar
what do you need to restore old brickwork
lime mortar so the bricks are less likely to move
property of cement mortar
hard but it cracks
property of lime mortar
more flexible than cement mortar
what is limestone made up of
calcium carbonate
chemical name for calcium carbonate
CaCO3
how was limestone formed
fossilised remains of sea creatures
what is a use of limestone
building materials for buildings such as cathedrals
the buildings are made from limestone blocks
powdered limestone + clay (heated) ->
cement
cement+water+aggregate->
concrete
what does calcium carbonate (CaCO3) thermally decompose into?
calcium oxide (CaO) and Carbon Dioxide (CO2)
what is calcium oxide used in?
construction
