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For the cold-pressed aggregate samples, porosity, bulk and grain densities were measured with __________

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For the cold-pressed aggregate samples, porosity, bulk and grain densities were measured with __________

(a) Hydrostatic pressure

(b) Cylindrical cavity

(c) Pycnometer

(d) Helium porosimeter

I have been asked this question in class test.

Asked question is from Elastic Properties of Aggregates in division Elasticity, Creep and Shrinkage of Concrete Technology

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Right option is (d) Helium porosimeter

Easy explanation: For the cold-pressed aggregate samples, porosity, bulk and grain densities were measured at room P–T conditions with a helium porosimeter.

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