C-Tech EDC-3A, Product Manual, Page: 4 / 7

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mixture along with the tray in the oven for heat insulation. Fetch out the preheat test mold and
sleeve from the oven, wipe the sleeve, base and the bottom of the hammer by cotton yarn with
a little grease. Install the test mold on the base, and pad a round small oil absorbent paper,
shovel the mixture into the mold from four direction according to quartering, pound 15 times
along the surroundings and 10 times in middle with slotting tool or large screwdriver. After pound,
flat the asphalt mixture to a convex circular surface. For large Marshall specimens, the mixture
should be added in twice, the pound times each time the same as above.
③ . Insert the thermometer to near the center of the mixture, and check the temperature of the
mixture.
④ . After the mixture temperature meets the requirements of compaction temperature, fix the mold
along with base on the compaction table, pad a round paper with small absorbent above the
mixture, and then insert the compaction head equipped with compaction rammer and guide rod
into the mold, turn on the compactor to start test.
IV. Operation
Before test, firstly connect through three-phase 380V power, and check whether the input and
working output aviation plug connected firmly.
① . Turn on the power switch. The upper screen is a counter that records the current compaction
times, and the lower screen shows the preset compaction times. According to actual needs,
press SET to preset the compaction times, and use + or - to adjust the value. Press RESET to
reset the counter.