© GCSE 026 08-April-13. Limestone quarry.

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Transcript of © GCSE 026 08-April-13. Limestone quarry.

Page 1: © GCSE 026 08-April-13. Limestone quarry.

© www.chemsheets.co.uk GCSE 026 08-April-13

Page 2: © GCSE 026 08-April-13. Limestone quarry.

Limestone quarry

Page 3: © GCSE 026 08-April-13. Limestone quarry.

Topley Pike quarry in the Peak District National Park

Page 4: © GCSE 026 08-April-13. Limestone quarry.

All built with limestone

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Chippings in roads

Chippings

Paving

To neutralise acidic lakes

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CaCO3 CaO + CO2calcium carbonate calcium oxide

(limestone) (quicklime)

CaO + H2O Ca(OH)2calcium oxide calcium hydroxide

(quicklime) (slaked lime)

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Lime kilns(old and new)

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Farmer spreading calcium hydroxide to neutralise acidic soil

http://www.sciencephoto.com/images/download_wm_image.html/C0066786-Spreading_lime-SPL.jpg?id=670066786
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Testing for CO2 with limewater (calcium hydroxide solution)

Testing for CO2 with limewater

Limewater = calcium hydroxide solution

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CEMENT

Powdered limestone

+Powdered

clay

Heat in rotary kiln

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CONCRETE

Cement

+

Sand

+

Water

+

Crushed rock

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Concrete can break if stretched or bent

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Steel reinforced concrete

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Steel reinforced concrete

http://www.sciencephoto.com/images/download_wm_image.html/T840277-Reinforced_concrete_bridge_under_construction-SPL.jpg?id=848400277
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Bahai Lotus Temple in Delhi, India – made of concrete (1980)

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MORTAR

Cement

+

Sand

+

Water

Page 17: © GCSE 026 08-April-13. Limestone quarry.

Mortar weathers and brickwork must be re-pointed.


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