Civil Engineering :: Building Materials
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The method of addition polymerization is used for obtaining:
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Pick up the correct statement from the following:
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A rock contains only one mineral. It is called
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Asbestos
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Pegmatite is a/an
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The percentage of alumina and silica in good fire clay vary respectively is
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The term frog means
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Asphalt is obtained from
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To retard the initial setting time of cement, the compound responsible, is
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Dorry's testing machine is used for
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A.
The lime in excess makes the cement unsound and causes the cement to expand and disintegrate |
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B.
The silica in excess makes the cement stronger but its setting time also increases |
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C.
The excess amount of alumina weakens the cement |
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D.
The addition of gypsum increases the initial setting time of cement |
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E.
All the above. |