Compaction Rate with a vibrating plate
Compaction Rate with a vibrating plate
(OP)
Is it possible to reach 95% compaction with a vibrating plate? The compaction area is has to reach for big machines. Is it possible to have several runs on thin layers and achieve what big machine can do?





RE: Compaction Rate with a vibrating plate
Moving the Earth, the workbook of Excavation 4th Ed
Nichols, Day
McGraw Hill 1999
doesn't make specific statement of what the kinds of small tampers and vibrators can get in terms of compaction, but says in the section that a compaction meter by MBW can measure the degree of compaction attained, "say 95 percent of optimum density". For the Vibrating Plate Tamper (not the "Frog", which is smaller) says "Compaction maybe obtained for some distance around the plate, by vibratory settling"; and further in the text a chart for compaction selection is given, where the recommended equipment for compaction is selected on the sole basis of the kind of soil to be compacted. Vibratory plates are only recommended for non cohesive soils up to a maximum mix of clay of 50% clay. This is the same range recommended for static rollers. For the contrary range, 100% clay to a mix with 50% sand, rammers and rammer plates are recommended. For mixes of sands and clays in-between, rammers with extension plates and vibratory rollers are recommended.
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
So, I agree, you'll have to be very close to "optimum", but I think the only way you can identify the optimum moisture content is to do a test pad.
f-d
¡papá gordo ain't no madre flaca!
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
RE: Compaction Rate with a vibrating plate
The plan is to spread almost 4" layers at a time, water it and pass over few times by the plate vibrator, the machine I have in mind is (6057 lbs. of force). The compacted material will always have to be wet to mitigate the risk from the naturally Air Borne Asbestos.
RE: Compaction Rate with a vibrating plate
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Although this won't provide the research papers used to develope the table, it does set out the level of compaction 'expected'. The process to use this will be to look at Table 6/2 and pick out the most similar grading to what you have, then look up this class in Table 6/1, this will then indicate the 'compaction method' which can be looked up in Table 6/4.
The basis of the research work was to measure the performance of the compaction plant and the end-performance of the material (in consideration of the proposed end-use). This was then used to develope the material class system, appropriate testing and outline specification limits. Therefore by following this procedure in reverse, the discussion of which is the appropriate method of laboratory compaction needed to identify the correct MDD for checking % compaction is dealt with as the method specified in Table 6/4 was derived from full scale compaction trials in a research environment. Very useful where you have a single-sized material that will not behave like a 'nice simple clay'.
RE: Compaction Rate with a vibrating plate