Reducing Field Sample of Aggregate to Test Sample ASTM C 702, D75
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 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.
Note
The sample splitters can be used instead of flattening the mass on a level surface.
Detailed statement is attached below along with photographs of equipment's used in test.
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 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.
Note
The sample splitters can be used instead of flattening the mass on a level surface.
Detailed statement is attached below along with photographs of equipment's used in test.
