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Percentage of alumina in good brick earth should be about ________(a) 5-10%(b) 20-30%(c) 35-40%(d) 45-60%I have been asked this question in semester exam.The origin of the question is Bricks topic in section Glass, Lime, Clay Products & Bricks of Construction & Building Materials

Answer»

Right choice is (b) 20-30%

Explanation: PERCENTAGE of alumina in good brick earth should be about 20-30%. Alumina is the main constituent of every KIND of clay and it IMPARTS plasticity to earth.



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