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3.2 CONCRETE SAMPLING Making, curing and testing cubes should be carried out in the correct manner. Even small deviations from the standard procedures will usually lead to compressive strength results which are lower than the true strength of the concrete. For example, for each 1% air entrapped there will be a 4 to 5% loss of strength. The procedures for concrete cube making are given in British Standard (BS) 1881:1983 Testing Concrete. 3.2.1 EQUIPMENT ⚫ Sample tray ⚫ Mould for making test cube ⚫ Scoop ⚫ Trowel ⚫ Compacting bar ⚫ Cleaning rags ⚫ A bucket or barrow for transporting the samples ⚫ Curing tank 3.2.2 DESIGN MIX CALCULATION For the design mix, the Volumetric Method was used to achieve the design of the concrete. This method was recommended by an engineer from YTL Cement that I approached to enquire about the design mix. To calculate the amount of materials needed the density, mass and volume for each of the materials need to be taken into account. The amount of Ordinary Portland Cement needed to 28PDF Image | concretes that use polymers as a binder
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