5 Questions
Explain the principle of compaction and its impact on soil densification.
The principle of compaction involves the application of mechanical energy to reduce air void spaces in the three-phase soil model, leading to densification of soils. It reduces the air content but not the water content.
What are the advantages of increasing compaction in soil?
Increasing compaction leads to the following advantages: increase in soil strength and bearing capacity, decrease in potential for settlement, controlled undesirable volume changes, decrease in hydraulic conductivity, and increase in stability of embankment slopes.
Differentiate between compaction and consolidation.
Compaction involves the reduction of air void spaces in soils to increase their density, while consolidation refers to the gradual settlement of soils under load.
What factors does the standard Proctor test consider in determining compaction?
The standard Proctor test considers dry density (rd), water content (w), compactive effort (energy E), and soil type (gradation, presence of clay etc.) in determining compaction.
What equipment and methods are used in the standard Proctor test?
The standard Proctor test uses ASTM D 698 standards, a 1/30 ft3 (943.3 cm3) mold with a diameter of 4 inches (101.6 mm), a 5.5 lb (2.45 kg) hammer, and a 12-inch (305 mm) drop.
Test your knowledge on soil compaction and the advantages of using soil as a construction material. Learn about the general associated problems with in situ soils in this quiz.
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