Please give assume question can coming from this page..my teacher tell I will br

Question

Please give assume question can coming from this page..my teacher tell I will bring questions explain . vi. Drainage Example of Drainage Layer in Pavement Structure 25 Pavement structure is asphalt concrete or Portland cement concrete. Base and subbase material must meet filter criteria. Drainage layer as a base. Material must meet filter criteria a) Base is used as the drainage layer Note: Filter fabrics may be used in heu of filter material, soil, or aggregate, depending on economic considerations 2 26 vi. Drainage Example of Drainage Layer in Pavement Structure Pavement structure is asphalt concrete or Base and subbase material must meet vertical drainage permeability criteria. Portland cement concrete. Drainage layer as a part of or below the subbase. Material must meet filter criteria Material must meet filter criteria if base or subbase adjacent to drainage layer does not meet filter criteria. Note: Filter fabrics may be used in lieu of filter material, scil, or atgregate, depending on economic considerations. (b) Drainage layer is part of or below the subbase.

Explanation / Answer

one question can arise that which planning is correct. then second is correct because, in the first figure, the base is below drainage. in that case, whole water will pass through drainage and base need not to pass filter criteria

But in second question drainage is below the base hence base/subbase must pass filter criteria.

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