AS NZS 2891.5:2015 pdf free download – Methods of sampling and testing asphaltMethod 5: Compaction of asphalt by Marshallmethod and determination of stability and flow一Marshall procedure

AS NZS 2891.5:2015 pdf free download – Methods of sampling and testing asphaltMethod 5: Compaction of asphalt by Marshallmethod and determination of stability and flow一Marshall procedure.
(e) Place the mould in the oven for suflicient time for the test portion to reach the specified compaction temperature. If the test portion has not reached the specified temperature within 60 minutes discard the test portion.
6.2 Plant produced mix
Plant produced mix shall he prepared as follows:
(a) Unless otherwise specified, obtain a bulk sample of asphalt in accordance with
ASINZS 2891.1.1.
(b) Preheat the specimen mould assembly in the oven.
(c) Obtain a representative test portion of the asphalt of sufficient mass to obtain a compacted specimen height of approximately 63.5 mm but within the allowable range of 57 mm to 70 mm by either—
(i) sample division of freshly produced asphalt that is at a temperature to facilitate sample division; or
(ii) placing a sample container in an oven, at a temperature not exceeding 160°C’ to reheat the sample. The sample shall not be in the oven for more than 3 h in total. When the sample is at a temperature to facilitate sample division remove the sample container from the oven and transfer the sample to a mixing tray or howl and prepare test portions.
NOTE: The cxpcctcd bulk density of the compacted asphalt may be used to calculate the mass necessary to give the desired specimen height.
(d) Place the test portion in the mould and spade the asphalt with a heated spatula 15 times around the perimeter and 10 times over the interior.
(e) Place the mould in the oven for sufficient time for the test portion to reach the specified compaction temperature. If the test portion has not reached the specified temperature within 60 mm discard the test portion.
7 COMPACTION OF SPECIMENS
The compaction procedure shall be as follows:
(a) Remove the mould from the oven. Place a thermometer in the mould and verify that the temperature of the asphalt in the mould is within the tolerance for the compaction temperature specified in Tables 1, 2 or 3. Record the temperature.
(b) Place a circular paper disc on top of the asphalt and transfer the mould assembly to the compaction pedestal.
(C) At a rate of 60 to 70 blows per minute, compact the mix using the specified number of blows of the compaction hammer with the hammer axis held vertically. Invert the mould and apply the same number of blows to the other end of the specimen.
10 TEST REPORT
The following shall he reported:
(a) Average stability, in kN. to the nearest 0.1 kN.
(b) Average flow, in mm, to the nearest 0. I mm.
(c) The number of blows.
(d) The mix identification.
(e) If the mix is a reheated bulk sample.
(f) If required, the Marshall quotient, in kN per mm, to the nearest 0.1 kN per mm.
(g) Reference to this Australian Standard, i.e. AS’NZS 2891.5.