Two tests shall be made, and it is recommended that the two samples should not be tested concurrently. If such material is used the fact shall be stated in the report. Aggregates which have been artificially heated shall not normally be used. An airtight container of capacity similar to that of the basketĪ sample of not less than 2000 g of the aggregate shall be tested.A shallow tray of area not less than 650 cm 2.Two dry soft absorbent cloths each not less than 75 x 45 cm.A stout watertight container in which the basket may be freely suspended.A wire basket of not more than 6.3 mm mesh or a perforated container of convenient size, preferably chromium plated and polished, with wire hangers not thicker than one millimetre for suspending it from the balance.Oven - A well ventilated oven, thermostatically controlled, to maintain a temperature of 100 to 110☌.Balance - A balance or scale of capacity not less than 3 kg, readable and accurate to O-5 g and of such a type and shape as to permit the basket containing the sample to be suspended from the beam and weighed in water.Aggregates having more water absorption are more porous in nature and are generally considered unsuitable unless they are found to be acceptable based on strength, impact and hardness tests. Water absorption gives an idea of strength of aggregate.
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