NETTCP Soil and Agg
What do you need to do to prep a sample for a washed sieve analysis?
• Dry until constant weight
• Dry in an oven at 230±9°F
How long do you wash the sample for?
Until the water is clear
What sieves do you use for washing?
A sieve between #8-16 and a 200 sieve
What is lost during washing process?
The fine aggregates
What is the procedure for drying after washing?
After washing, place the sample into the oven to dry at 230±9°F until constant weight.
Record final weight to determine how much of the sample(fine) was lost.
How do you calculate dry weight after washing?
(Initial dry weight - Final dry weight)/(Initial dry weight)
Procedure for sieve analysis after washing, drying, and weighing
Make sure sieves are in correct order
How long do you run the sieve shaker?
Depends on sieving adequacy
• Holes in the sieves
• machine shaking ability
• shaking ability on machine
What is the frequency for sieve shaking by hand?
150 strokes per min
How do you determine if you have too much material on a sieve?
Check the table
• determines max amount of mass per sieve
, What type of brush should you use and when?
Use a fine brush for sieves less than 30
Use a stiff brush for sieves greater than 30
How do you prepare a sample for the proctor test?
• Dry in a 140°F Oven until friable
• Pass the sample through the appropriate sieve
What is the volume of a 4 in. mold size?
0.0333 cubic feet
What is the volume of a 6 in. mold size?
0.075 cubic feet
What methods use standard proctor test?
Method A and C
What methods use the modified proctor test?
Method B and D
What is the standard proctor test?
• 5.5 lb. rammer
• 25 blows per layer
• 3 layers
What is the modified proctor test?
• 10 lb. rammer
• 56 blows per layer
• 5 layers
What sieves do you use for each method of the proctor test?
#4 for Method A and B
3/4 in. for Method C and D
How do you take the sample after proctor?
• Cut the soil in half after removing it from mold
• Rid of a half and take slice of face of other half
Pneumatic Roller
Effective on any soil
What do you need to do to prep a sample for a washed sieve analysis?
• Dry until constant weight
• Dry in an oven at 230±9°F
How long do you wash the sample for?
Until the water is clear
What sieves do you use for washing?
A sieve between #8-16 and a 200 sieve
What is lost during washing process?
The fine aggregates
What is the procedure for drying after washing?
After washing, place the sample into the oven to dry at 230±9°F until constant weight.
Record final weight to determine how much of the sample(fine) was lost.
How do you calculate dry weight after washing?
(Initial dry weight - Final dry weight)/(Initial dry weight)
Procedure for sieve analysis after washing, drying, and weighing
Make sure sieves are in correct order
How long do you run the sieve shaker?
Depends on sieving adequacy
• Holes in the sieves
• machine shaking ability
• shaking ability on machine
What is the frequency for sieve shaking by hand?
150 strokes per min
How do you determine if you have too much material on a sieve?
Check the table
• determines max amount of mass per sieve
, What type of brush should you use and when?
Use a fine brush for sieves less than 30
Use a stiff brush for sieves greater than 30
How do you prepare a sample for the proctor test?
• Dry in a 140°F Oven until friable
• Pass the sample through the appropriate sieve
What is the volume of a 4 in. mold size?
0.0333 cubic feet
What is the volume of a 6 in. mold size?
0.075 cubic feet
What methods use standard proctor test?
Method A and C
What methods use the modified proctor test?
Method B and D
What is the standard proctor test?
• 5.5 lb. rammer
• 25 blows per layer
• 3 layers
What is the modified proctor test?
• 10 lb. rammer
• 56 blows per layer
• 5 layers
What sieves do you use for each method of the proctor test?
#4 for Method A and B
3/4 in. for Method C and D
How do you take the sample after proctor?
• Cut the soil in half after removing it from mold
• Rid of a half and take slice of face of other half
Pneumatic Roller
Effective on any soil
