Andres Graffe's List: Environmental

• Learn the difference between cement and concrete, and understand   the different types of materials that can be used to partially replace   cement in a concrete mix.
• 10 to 20 % water

  • use of water is an environmental issue?
• It also offers significant environmental benefits,   since each tonne of cement replaced by a supplementary cementing   material reduces CO2 emissions by approximately one tonne.

  • 1 tonne of cement = 1 tonne of CO2?
• Consisting of silicates, aluminosilicates of calcium, and other   compounds, blast-furnace slag is the by-product of molten iron production   in a blast furnace

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