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Sampling of Trial Mix

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This process is usually conducted at the approved batching plant . When the trial mix of concrete ( with a nominal load ) produced from the batching plant is sufficiently mixed inside the mixer or the drum of a concrete truck , the mix is then discharged with a chute for testing . 3 separate increments should be obtained with a scoop by passing across the stream of concrete at about the first 1/6 , 1/2 and 5/6 of the load and put into a bucket . Pour these sampled concrete onto a levelled tray of approximate size 900mm x 900mm x 60mm high edges and thoroughly mix it together . After passing the slump test and temperature test , the mix is then evenly spread out inside the tray and divide to 4 quarters on plan . Remove away one set of opposite quarters in either direction , the remaining 2 quarters will then be thoroughly mixed up again for sampling of the test cubes .

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