Procedure. Take 500 grams of fine aggregate overdried at a temperature of 100 to 110 degrees Celsius for 24 hours. This weight measure as W1. The cooled sand takes in an airtight container. So this weight measure as W2. The water content of the sample calculate as. Wc = (W1W2)X 100/W1. In a pan, 250 grams of sand takes.
Purpose: To obtain laboratory samples of aggregates from stockpiles. Equipment : Shovel, scoop, boom. Procedure: 1 Obtain a sample of aggregate (about 50 kg) from three places in the stockpile: from the top third, at the midpoint, and from the b ottom third of the volume of the pile. 2 Place the field sample on a hard, clean level surface. 3 Mix the material thoroughly by .