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

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Presentation on theme: "© www.chemsheets.co.uk GCSE 026 08-April-13. Limestone quarry."— Presentation transcript:

1 © GCSE April-13

2 Limestone quarry

3 Topley Pike quarry in the Peak District National Park

4 All built with limestone

5 Chippings in roads Chippings Paving To neutralise acidic lakes

6 CaCO 3  CaO + CO 2 calcium carbonate calcium oxide (limestone) (quicklime) CaO + H 2 O  Ca(OH) 2 calcium oxide calcium hydroxide (quicklime) (slaked lime)

7 Lime kilns (old and new)

8 Farmer spreading calcium hydroxide to neutralise acidic soil

9 Testing for CO 2 with limewater (calcium hydroxide solution) Testing for CO 2 with limewater Limewater = calcium hydroxide solution

10 CEMENT Powdered limestone + Powdered clay Heat in rotary kiln

11 CONCRETE Cement + Sand + Water + Crushed rock

12 Concrete can break if stretched or bent

13 Steel reinforced concrete

14

15 Bahai Lotus Temple in Delhi, India – made of concrete (1980)

16 MORTAR Cement + Sand + Water

17 Mortar weathers and brickwork must be re-pointed.


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