When compaction of soil in the field is done using rolling machines, it is important to know O.M.C. and M.D.D. values. Standard compaction test is used to determine is Laboratory Optimum Moisture Contents (O.M.S.) and Maximum Dry Density (M.D.D) for soils, which represents field samples. Compacted soils have increasing use in embankment of dams, highways, railways etc. In recent years in order to meet current heavy traffic on runways and highways. Heavy duty field compacting equipment has come into use and in view of reproducing greater densities; heavy compaction tests using heavy compaction apparatus have been developed. 

 

Now-a-days almost every soil Laboratory conducts compaction and penetration tests on soils. In both standard and heavy compaction test 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 devised to eliminate tedious hand compaction process. Which 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.

Specification:

It consists of the following:

•It is a motor driven mechanical compactor useful for soil compaction into 100mm or 150mm diameter moulds.

•Two sets of rammers are provided, one of 2.6 and arranged for 310mm. drop and other 4.9kg and arranged for 450mm fall.

•For compaction soil into 150mm dia. moulds, 100mm face dia. rammers having weight .6kg and 4.89 kg are used whereas for 100 mm dia. moulds they are of 50mm dia.

•The rammer assembly is provided with a ratchet and pawl arrangement to lift it from the top of the soil layer.

•When the rammer reaches the required height the pawl release the rammer which falls freely in 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 the specimen mould is to fitted to the rotating base plate of the th instrument which make 1/5 revolution per stroke.

•The equipment is suitable for operation on 230Volts, 50 cycles, single phase, A.C. supply.