Question

The air content ratio is defined as the ratio of _____

(a) volume of air voids to total volume of the soil mass

(b) volume of air voids to volume of total voids

(c) volume of air voids to volume of water

(d) volume of voids to total volume of the soil mass

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I need to ask this question from Void Ratio, Porosity and Degree of Saturation in chapter Preliminary Definitions and Relationships of Geotechnical Engineering I

Answer 1

Right option is (b) volume of air voids to volume of total voids

To explain: The air content is defined as the ratio of the volume of air voids to the volume of total voids. It is related with the degree of saturation S as ac=1-S.                                                                                                                       ac= Va/Vv.