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Irrigation Engineering
A flexible membrane impregnated with tar or...

A flexible membrane impregnated with tar or bitumen is spread over the subgrade in _________________

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+1 vote

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

A flexible membrane impregnated with tar or bitumen is spread over the subgrade in _________________

(a) asphalt lining

(b) soil-cement lining

(c) cement mortar lining

(d) puddle clay lining

This question was addressed to me in examination.

Query is from Earth Type Linings in division Lining of Irrigation Canals and its Economics of Irrigation Engineering

irrigation engineering
lining of irrigation canals and its economics
earth type linings

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1 Answer

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answered Aug 16, 2023 by Greg (106k points)

The correct choice is (a) asphalt lining

The explanation is: In Asphalt lining a flexible membrane-like rot proof canvas or cloth is infused with tar or bitumen is spread over the subgrade. This forms an impervious barrier and is responsible for preventing seepage loss.

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Puddle clay is laid on the subgrade to form a fairly water-tight coating.

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