Term
| Factors Affecting Compaction |
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Definition
-moisture content
-soil type
-compaction effort |
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Term
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Definition
the densification of soil by removal of air, which requires mechanical energy
when water is added to the soil during compaction, it acts as a softening agent and the soil particles slip over each other into a densely packed position |
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Term
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Definition
energy per unit volume
when changed, the moisture unit weight curve will also change
1. As the compaction effort is increased, the maximum dry unit weight of compaction is also increased
2. As the compaction effort is increased, the optimum moisture content is decreased to some extent |
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Term
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Definition
1. Smooth wheel roller
2. Pneumatic rubber tired roller
3. Sheepsfoot roller
4. Vibratory roller |
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Term
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Definition
suitable for proof-rolling sub-grades and for the finishing operation of fills with sandy clayey soils
100% coverate with ground contact pressures as high as 310-380 kN/m2 |
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Term
| Pneumatic Rubber-Tired Rollers |
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Definition
closely spaced with four to six tires in a row
70% coverage with 600 to 700 kN/m2 |
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Term
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Definition
drum with a large number of projections
most effective in compacting clayey soils |
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Term
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Definition
| very efficient in compacting granular soils, can be attached to other types of rollers |
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Term
| Determination of Field Unit Weight after Compaction |
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Definition
1. Sand Cone Method
2. Rubber Balloon Method
3. Nuclear Method |
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