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According to IS: 456-1978, minimum period stipulated for moist curing of concrete using ordinary portland cement is
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In concrete mix design, allowance for bulking of sand is necessary in case of
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Addition of sugar in concrete (about 0.05% of weight of cement) results in
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The presence of entrained air in concrete results in i) reducing bleeding ii) lowering density of concrete iii) decreasing strength at all ages The correct answer is
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The test conducted in the laboratory on the specimen made out of trial concrete mix is called
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If the slump of concrete mix is 70mm, its workability is considered to be
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The top diameter, bottom diameter and height of the mould used for slump test are respectively
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The steel mould used for slump test is in the form of a
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The maximum quantity of aggregate per 50kg of cement should not exceed
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The fineness modulus of an aggregate is roughly proportional to
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