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CMP 305 Final Exam|Questions with 100% Correct Verified answers
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CMP 305 Final Exam|Questions with100% Correct Verified answers
Four basic compaction forces - ✔✔- Static weight
- Manipulation (kneading)
- Impact
- Vibration
All Compactors Use.... - ✔✔Static Weight
Most effective Compaction Method for Cohesive Soils - ✔✔-
Manipulation (Kneading) and Pressure
Most effective Compaction Method for Noncohesive Soils - ✔✔- Vibration
OMC - ✔✔Optimum Moisture Content
Greatest Influencer on Compaction - ✔✔Water Content
5 Factors That Influence Degree of Soil Compaction - ✔✔- Soils chemical
and physical properties
- Soils moisture content
,- Amount of energy induced
- Compaction method
- Thickness of lift
Lift - ✔✔one layer of one type of soil
Procter Test (def) (types) - ✔✔- Evaluates soils moisture density relation
under a specified compaction effort.
- Standard and Modified
Modified Procter Tests - ✔✔- Requires 4x as much labor
- Compactive effort is 4x the standard test
- Used for high design load
Test details for Modified vs Standard Proctored Test - ✔✔Test details
- Number of layers: M=5, S=3
- Wt of hammer: M=10, S=5.5
- Ht of hammer: M=18", S=12"
OMC for Modified vs Standard Proctored Test - ✔✔- M: 5-12%
- S: 10-15%
As OMC decreases Compactive effort... - ✔✔Increases
, Method of Describing which proctor Test is to be Used - ✔✔-
Minimum Dry Density
- 100%= Standard = 105pcf
- 95%= Modified = 99.8pcf
Semi-Direct Soil Exploration Types - ✔✔- Auger Drilling
- Rotary Drill
- Wash-boring
- Drilling Rock
- Cone Penetrometer
Auger Drilling (2 types) - ✔✔- Solid: Dry Regions, auger is removed for sample
- Hollow: Sample through auger, faster, *use in Michigan*
-Dis: Disturbed sample
Rotary Drill (Auger with clay slurry) - ✔✔- Slurry moves soil up,
stabilizes sides by coating the sides of the hole.
Wash-boring - ✔✔- Drill with jet water
- Floats material out
- Casing required
- ADV: Small unit
- DIS: Disturbed sample, water content
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