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EARTHWORK LEVEL 1 STUDY GUIDE
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EARTHWORK LEVEL 1 STUDY GUIDE
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EARTHWORK LEVEL 1 STUDY GUIDEWhat is the purpose for the Sampling, Testing, and Reporting Guide?
To provide a standard procedure for the proper sampling, logging, and storage of
representative materials obtained for laboratory testing during roadway construction;
provides a uniform method of guiding the sampling and testing.
What is a layer of material of not more than 6 inches compacted thickness for full width
where a sample is gotten from?
Lift
What is a single lift of finished material compacted not to exceed 500 feet?
Lot
What are the two items used to describe soil?
Color and Texture
Who performs the tests and collects the samples?
Project Personnel (PP)
Why sampling in the field?
To test the actual materials that are in the field.
What are we sampling?
The intention is to retrieve a sample of each type of material; many types are brought
onto or found on the job.
What type of sample do we want to get?
Representative samples
How do we ship samples?
Use containers that preclude sample loss, contamination, or damage and attach sample
identification
What is the document that itemizes the minimum requirements for sampling and
testing?
Sampling Testing and Reporting Guide (STRG)
When sampling material from the roadway, what is the minimum number of samples
taken to be combined to form the representative sample?
, Three
Moisture acts as a lubricant in the soil material thus permitting what?
Maximum densification (Less voids)
The reduction of voids creates what kind of changes in the material?
Increase in unit weight, decrease in compressibility, and decrease in permeability
What test is a laboratory test which establishes a density standard that a Contractor
must achieve a certain percent of, in the field for a given material?
Proctor Test
What are the two types of Proctor Tests?
Modified (used for subgrade and MSE walls) and Standard (used for embankment and
structure)
What is the weight of material occupying a unit volume?
Unit Weight
AASHTO T-99 refers to which Proctor?
Standard
FM 1 T-180 refers to which Proctor?
Modified
How many times can standard counts be redone?
Per the manufacturer's recommendation
How many minutes do you allow a gauge to warm up?
Per the manufacturer's recommendation
What is the "Density" we are measuring?
In place Dry Density of soil for comparison to the Maximum Dry Density determined by
the Proctor Test.
Can the Density be more than 100% of Maximum Dry Density reported in the Proctor
Test?
Yes, if the compactive effort applied in the field is greater than the compactive effort
applied in the lab.
How many more inches should the drill rod be driven than your test?
Two inches
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