Cement, water, sand and gravel are mixed to form ______.
A
rocks
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B
concrete
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C
gypsum
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D
Portland cement
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Solution
The correct option is B concrete Concrete is prepared by mixing cement, water, sand and gravel. These are commonly used in construction of sheets, pipes and pillars.
Portland cement is made up of lime, silica, alumina, iron oxide and gypsum.