ABSTRACT
Compaction is the mechanical densification of soil. It is accomplished by forcing the soil particles together, expelling air from the soil structure. Soil is compacted to improve its strength and minimize settlement. The amount of shrinkage depends on the soil type, the soil moisture content, and the amount of compactive effort applied. If the natural moisture content of the soil is not near the optimum value, water should be added to or removed from the fill material as it is being spread and compacted. The tamping-foot compactor uses its static weight and kneading action for compaction and is effective with clay and silty clay soils. The feet sink into the loose material kneading and tamping the soil at the bottom of the lift. Vibratory compactors are manufactured in a variety of sizes and types. A contractor is constructing a compacted fill that will be used to support concrete slab foundations for a complex of large warehouses.
