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Quartering fresh concrete
Quartering is the alternative method of reducing the size of a bulk fresh concrete sample. The bulk sample should be shovelled to form a cone, and turned over to form a new cone, this being done three times. The third cone should be flattened to an even layer 75 - 100 mm thick and then divided into four equal quadrants with two diagonally opposite quarters being discarded. The procedure is then repeated on the remainder until the desired size of sample remains. A similar process can be used for sub-dividing aggregate.
Acknowledgement:
Concrete Society
