for - cement - process inefficiency

process inefficiency - cement (see below)

• The world over we crush rocks (like gabbro) into gravel. - We dig up and pulverise limestone.
• In gas powered factories we burn the limestone to make cement.
• We dig up a lot of sharp sand.
• At state-of-the-art batching plants we mix them with water to make liquid concrete.
• With sophisticated algorithms and just in time management principals
  • a fleet of wagons distributes it to building sites. - Meanwhile we’ve
  • laid out steel falsework and
  • timber formwork.
  • sprayed on releasing agent and
  • laid rebar on spacer blocks.
  • pour on the concrete
  • vibrate, level and float it and then wait.
• A week later we strip away the formwork;
  • after 28 days we remove the falsework.
  • Hey presto! Stone again!
  • In two months we’ve turned
    • a lump of 230N stone into
    • a lump of 40N concrete.