- Limestone is a sedimentary rock consisting mainly of calcium carbonate.
- It is Cheap.
- It is Easy to obtain
- It has many uses.
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Limestone as a Building Material
- Limestone can be quarried
- Limestone can be cut into blocks
- Limestone can be used to build houses.
- It can be eroded by acid rain however this is a very slow process.
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- Calcium Carbonate (Caco3) is heated in a kiln.
- When Calcium Carbonate is heated in a kiln it Decomposes (Thermal Decomposition)
- Thermal Decomposition causes Calcium Carbonate to Break Down into Calcium Oxide and Carbon Dioxide.
- Magnesium, Copper, Zinc, Calcium and Sodium carbonates all decompose in a simlar way.
- Some Carbonates may not decompose at the temperature of a Bunsen Burner (E.g Group 1)
- Calcium Oxide can be reacted with water to produce calcium hydroxide.
- Calcium Hydroxide can be used to neutralise soils and lakes, preventing crop failure.
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Making Cement, Mortar and Concrete
- Powdered Limestone is roasted in a rotary kilm with powdered clay to produce dry cement.
- When sand and water are mixed in, mortar is produced.
- Mortar can be used to hold bricks and stones together.
- When aggregate, sand and water are mixed in, concrete is then produced
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