Reducing Field Sample of Aggregate to Test Sample
Purpose: To obtain laboratory samples of aggregates from stockpiles.
Equipment: Shovel, scoop , boom.
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 bottom third of the volume of the pile.
2- Place the field sample on a hard, clean level surface.
3- Mix the material thoroughly by turning the entire sample three times.
4- Shovel the entire sample into a conical pile.
5- Carefully flatten the conical to a uniform thickness and diameter by pressing down the apex with a shovel. ( The diameter should be approximately four to eight times the thickness).
6- Divide the flattened mass into four equal quarters with a shovel.
7- Remove two diagonally opposite quarters. Brush the cleared spaces clean.
8-Mix and quarter the remaining materials until the sample is reduced to the desired size.
The sample splitters can be used instead of flattening the mass on a level surface.