Which of the following construction and demolition materials would be most useful in making concrete?
O Scrap tires
O Fly ash
O Blast furnace slag
O Old gypsum drywall
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Explanation:
As waste materials from construction can be: wood, drywall, masonry, metal, concrete, plastic, glass, cardboard. The construction waste quantities are bigger in metropolitan areas, where there are more buildings. Usually the construction waste is storage in landfills.
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