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Word:
Cement
Definition:
Cement is a powdery type substance made from a mixture of earths materials such as limestone and shale, which is sintered (cause to become solid mass by heating without melting), ground, and mixed with small amounts of calcium sulphate and calcium carbonate.
Cement is activated by water and when mixed with gravel and sand, forms concrete.
A building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar
Cement is usually grey in colour, but white cement can be obtained.
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