Advantages and Disadvantages of Quarrying

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Presentation transcript:

Advantages and Disadvantages of Quarrying CWK CWK Advantages and Disadvantages of Quarrying Describe briefly the uses if limestone and how it is quarried. Consider and evaluate the environmental, social and economic effects of exploiting limestone and producing building materials from it. Evaluate the developments in using limestone, cement and concrete as building materials, and their advantages and disadvantages over other materials. Lesson 17 MrMortonScience

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CaCO3 → CaO + CO2 CaO + H2O → Ca(OH)2 calcium carbonate calcium oxide (limestone) (quicklime) CaO + H2O → Ca(OH)2 calcium oxide calcium hydroxide (quicklime) (slaked lime)

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Powdered limestone + clay Heat in rotary kiln CEMENT

Cement + Sand Water Crushed rock CONCRETE

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