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Generally heavy weight aggregate obtained from ______________

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Generally heavy weight aggregate obtained from ______________

(a) Minerals ores

(b) Palm oil shell

(c) Sand

(d) Crushed stone

I have been asked this question in an international level competition.

This is a very interesting question from Source of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology

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The correct choice is (a) Minerals ores

To elaborate: The unit weight of heavy weight concrete varies from 2400kg/m^3 with sp.gr range from 4.0 to 4.6 (mineral ores and barite).

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