This guide explains why compaction matters, how soils respond to compactive effort, which machines to use for which soils, and how to verify results with Proctor testing, field density tests, and stiffness methods.
In soil science and agronomy, soil compaction is usually a combination of both engineering compaction and consolidation, so may occur due to a lack of water in the soil, the applied stress being internal suction due to water evaporation [1] as well as due to passage of animal feet.
Understanding and managing soil compaction is crucial for maintaining soil health and optimizing land use. What is Soil Compaction? Soil compaction is a physical process in which soil particles are pressed together, reducing the pore spaces between them.
Soil compaction occurs when soil particles are pressed together, reducing pore space between them (Figure 1). Heavily compacted soils contain few large pores, less total pore volume and, consequently, a greater density. A compacted soil has a reduced rate of both water infiltration and drainage.
Soil compaction squeezes out air and water, stressing roots and soil life. Learn what causes it, how it affects plants, and how to prevent or reverse it.
Densification of soils during construction of embankments and subgrades is achieved by compaction. Higher density of embankments and subgrades is achieved by compacting the soil by rollers usually in layers, known as lifts.
Compaction occurs when particles are pressed together to reduce the space between them. Highly compacted soils contain very few spaces resulting in soil with higher unit weight.
Soil compaction is one of the basic processes for increasing soil density. Through this process, mechanical pressure eliminates air voids. Moreover, this procedure increases soil stability, durability, as well as bearing capacity. That’s why it is a critical step in infrastructure development.