compaction equipment
TRANSCRIPT
1Compacting Equipment
What is the compaction of soil?
Soil compaction is the compression of soil particles.
Compaction reduces total pore space of a soil.
More importantly it significantly reduces the amount of large pore space, restricting air and water movement into and through the soil.
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Definition of Compaction
• The densification of soil by the application of mechanical energy is known as compaction.
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REQUIREMENT OF SOIL COMPACTION
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To increase soil strength
To improve the stability of soil
To reduce soil permeability
To reduce erosion
damage
Compacting equipment
For soil For concrete
Equipment for Compaction of soil
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Equipment for Compaction of soil
Smooth wheel rollers Pneumatic rollers Grid rollers Tamping rollers Vibrating rollers Vibrating plates Vibratory compaction
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Smooth Wheel Rollers
Smooth wheel rollers are one of the most common types of compaction equipment used.Weighing from 5 to 15 tones.They are suitable for compacting sand, gravel, broken stones etc.They are used for compacting highway base courses.
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Sheep foot rollers
• In this type, on the outer surface of a metal cylinder, metal pieces of the shape of sheep foot are fixed.
• Weight of drum is about 1.5 to 10 tonne. • It is suitable for compacting cohesive
soil(clays).
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Pneumatic rollers
• machine consists of a number of rubber tires, highly inflates.
• The rear of which has one more wheel than the front.
• Most suitable for compacting fine-grained soil and well graded sands.
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Pneumatic rollers
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Grid rollers• As the name suggests, these rollers have a
cylindrical heavy steel surface consisting of a network of steel bars forming a grid with squire holes.
• The weight of this roller can be increased by ballasting with concrete blocks.
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Tamping Rollers These rollers are similar to sheep foot
rollers with lugs of larger area than sheep foot rollers.
tamping rollers have static weights in the range of 15 to 40 tonnes.
tamping rollers are best suitable for compacting cohesive soils.
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Compacting equipment
For soil For concrete
Vibrating rollers
Similar to smooth wheel rollers with the modification of rotating drums.
Very expansive but have high output and performance.
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Vibrating plates Compactors
• These equipments are used for small areas. The usual weights of these machines
• vary from 100 kg to 2 tonnes with plate areas between 0.16 m and 1.6 m .
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Rammers
• Rammers are used for compacting small areas by providing impact load to the soil.
• This equipment is light and can be hand or machine operated.
• The base size of rammers can be 15cm x 15cm or 20cm x 20cm or more.
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Equipment for consolidation of concrete
Equipment for consolidation of concrete
Internal vibrator
Surface vibrator
Platform vibrator
Form vibrator33
Vibrator are of the following four general types
Internal vibrator
External vibrator (Form vibrator)
Table vibrator
Surface vibrator
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Internal vibratorIt is the most commonly used vibrator.it
is also known as Needle vibrator or Immersion vibrator or Poker vibrator.
It is consists of a power unit, a flexible shaft and a needle.
Such vibrators are used for compacting large sections of mass concrete in structures, for concrete of foundations, columns, beams etc.
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EXTERNAL VIBRATOR (FORM VIBRATOR)
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Form vibrators are particularly effective on columns and in the casting of preast units such as pipes, slabs, piles etc.
The vibrator is clamped on to the external wall surface of the formwork.
It will produce a good finish to the concrete surface.
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External vibrator for small area
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Table vibrator
• The vibrating tables consists of a rigidly built steel platform mounted on flexible springs and is driven by an electric motor.
• Small size table vibrator is known as platform vibrator.
• They are commonly used for vibrating concrete cubes.
ZDP concrete table vibrator
Platform Type Concrete Vibrator.
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Surface vibrator Surface vibrators are also known as
screed vibrators. It is suitable for compacting and
leveling of thin concrete members, such as floor slabs, roof slabs and road slabs.
Surface vibrators cause movement of finer material to the top and hence aid the finishing operation.
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Thank You.
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