Using Limestone

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  • Using limestone
    • Mainly Calcium carbonate
    • Quarried from ground
      • Made into blocks for buildings
      • Sturdy
      • Doesn't react
      • Messes up landscape
      • Noise and dust
      • Destroy habitat
      • Pollution
    • Heated - thermally decomposes
      • Calcium Oxide
      • Carbon Dioxide
    • Acid - reacts
      • Salt
      • Carbon dioxide
      • Water
    • Add water to calcium oxide
      • Calcium hydroxide
        • Alkali - neutralise acidic soil
        • Test for CO2
          • Lime water+ bubbles - cloudy if CO2 is present
    • Uses
      • Cement - sand + aggregate (water and gravel) - concrete
      • Cement - sand + aggregate (water and gravel) - concrete
        • Lots of dust - breathing problems
      • Cement - sand + water - mortar Cement - sand + water - mortar
        • Energy - fossil fuels - pollution
      • Positives
        • Makes products
        • Neutralises acidity from acid rain
        • Provides jobs
        • Landscape improved when finished with
    • Advantages
      • Widely available
      • Cheap
      • Easy to cut
      • More hard-wearing also attractive
      • Concrete - easily shaped
      • Concrete - quick and cheap construction
      • Doesn't rot
      • Concrete - doesn't corrode
      • Limestone - fire resistant
    • Disadvantages
      • Concrete - ugly
      • Concrete - low tensile strength - can crack

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