AS PER IS: ASTM D 558, BS 1377-4



Now-a-days almost every soil laboratory conducts compaction and penetration tests on soils. In both standard and heavy compaction tests the operator has to count the number of blows of the rammer on each layer of soil during compaction. A mechanically cum electrically operated automatic compactor is therefore device to eliminate tedious hand compaction process. This also considerably saves time with the rammers provided two stroke lengths, available, the compactor can be used for normal compaction / heavy compaction as well as C.B.R. compaction.


General Description and Specifications:

  • It is a motor driven mechanical compactor useful for soil compaction into 100 mm or 150 mm diameter moulds.
  • Two sets of rammers are provided, one of 2.6 kg and arranged for 310 mm drop and other 4.9 kg and arranged for 450 mm fall.
  • For compaction soil into 150 mm dia moulds, 100 mm face dia rammers having weight 2.6 kg and 4.89 kg are used. Whereas for 100 mm dia moulds they are of 50 mm dia.
  • The rammer assembly is provided with a ratchet and pawl layer.
  • When the rammer reaches the required height the pawl release the rammer which falls freely on soil surface.
  • The release mechanism is operated by an arm moving up and down which is connected to a reduction gear coupled to the motor through another arm.
  • An automatic blow counter fitted to the compactor is used to set the number of blows.
  • The base plate of th specimen mould is to be fitted to the rotating base plate of the instrument which makes 1/5th revolution per stroke.
  • The equipment is suitable for operation on 230 volts, 50 cycles, single phase, A.C. supply.
  • Moulds are to be ordered separately.


Moulds For Above are: -

  • Proctor mould: 100 mm dia X 127.3 mm high X 1000cc volume, with collar & base plate (Mild Steel or Gun metal)
  • Proctor mould: 150 mm dia X 127.3 mm high X 2250cc volume with collar & base plate (Mild Steel or Gun metal)




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