State suitability of following compaction equipments (i) Smooth wheel roller (ii) Sheep foot roller, (iii) Rammer and (iv) Vibrator

State suitability of following compaction equipments (i) Smooth wheel roller (ii) Sheep foot roller, (iii) Rammer and (iv) Vibrator
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1 Answer

Answer :

Types of Compaction Equipment: -

i) Compaction by Rolling: -

a) Smooth wheel rollers :

Suitability: These rollers best suitable for 5ubgrade or base coarse compaction of cohesion less soils. ,

b) Pneumatic tyred rollers:

Suitability: Pneumatic tyred rollers are effective for compacting cohesive as well as cohesion less soils. Light rollers are effective for compacting soil layers of small thickness

c) Sheep foot roller :

Suitability : Suitable only for fine grained soil

ii) Compaction by Rammers:

Rammers or tampers are mainly two types, hand operated and mechanical rammer. A hand operated rammer consists of a block of iron or stone about 3 to 5 kg in mass, attached to a wooden rod. The tamper is lifted for about 0.3 m and dropped on the soil to be compacted. A mechanical rammer is operated by compressed air or gasoline power. It is much heavier, about 30 to 50 kg. Ramming equipment’s consists of three types: dropping weight type, internal combustion type and pneumatic type. Rammers or tampers are used to compact the soil.

Suitability: Suitable for all types of soil

iii) Compaction by vibratory compactors :

The vibrating equipment, mounted on screeds, plates or rollers are of two

Types: a) Dropping weight type and b) Pulsating hydraulic type. By giving vibration to

Soil, soil particles are packed together and compaction of soil is achieved.

Suitability: Suitable for compacting granular soils. with no fines in layer up to 1 m thickness


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