A soil sample was compacted. The result of the standard proctor test shows that at 100% compaction, the soil weighs 132.3 pcf with optimum moisture content of 14%. Gs = 2.67 a) What is the saturated unit weight of the soil in pcf? b) What is the maximum dry unit weight of the soil (at zero air voids) in pcf?

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Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.