For new embankments in black cotton soil, the material used as blanket is:

Question

Question

This question was previously asked in

JKSSB JE Civil Jal Shakti 6 Dec 2022 Official Paper (Shift 1)

Answer 1

Explanation:

Moorum:

Moorum is formed by the decomposition of laterite rocks. Or in other words, Moorum is fragmented weathered rock naturally occurring with varying proportions of silt and clay.
It is red, and sometimes yellow, in colour.
Mooram ballast is generally used as initial ballast in new constructions and also as sub-ballast. Since it prevents water from percolating into the soil, it is also used as a blanket material for black cotton soil.

Additional Information

Sand:

The sand particles consist of small grains of silica (SiO₂).
It is formed by the decomposition of sandstone due to weathering. Sand is an important building material.

Coal ash:

coal ash is produced primarily from the burning of coal in coal-fired power plants.
Fly ash is the by-product of coal ash.
Fly ash is partially replacing cement material because it has cementitious properties.