# Unit weight of soil

Unit weight of soil is the ratio of the total weight of the soil to the total volume of the soil. It is also called weight density or bulk density and has units of kN/m 3 or lb/ft 3 . There are different types of unit weight of soil depending on the moisture content and the void ratio of the soil. Here are some definitions of the common types of unit weight of soil: - Bulk unit weight: This is the unit weight of the soil when it contains both solid particles and water. It is also called moist unit weight and is denoted by γ or γm¹². - Dry unit weight: This is the unit weight of the soil when it contains only solid particles and no water. It is denoted by γd and is obtained by dividing the weight of the solid particles by the total volume of the soil¹². - Saturated unit weight: This is the unit weight of the soil when it is completely saturated with water, meaning that all the voids or spaces between the solid particles are filled with water. It is denoted by γsat and is obtained by dividing the weight of the solid particles and water by the total volume of the soil¹². - Submerged unit weight: This is the unit weight of the soil when it is submerged in water, meaning that the weight of the soil is reduced by the buoyant force of water. It is also called effective unit weight and is denoted by γ' or γb. It is obtained by subtracting the unit weight of water from the saturated unit weight of the soil¹². For more information, you can check out these web pages: Unit Weights and Densities of Soil | Geotechnical Engineering Review, Unit Weight of Soil - Bulk | Dry | Saturated and Submerged Unit Weight, Soil Unit Weight Technical Note - ABG Geosynthetics, Chapter 2 Phase Relations. Source: Conversation with Bing, 2/28/2024 (1) Unit Weights and Densities of Soil | Geotechnical ... - MATHalino. https://mathalino.com/reviewer/geotechnical-engineering/unit-weights-and-densities-soil. (2) Unit Weight of Soil - Bulk | Dry | Saturated and Submerged Unit Weight. https://expertcivil.com/unit-weight-of-soil-bulk-dry-saturated-and-submerged-unit-weight/. (3) Unit Weights and Densities of Soil | Geotechnical ... - MATHalino. https://mathalino.com/reviewer/geotechnical-engineering/unit-weights-and-densities-soil. (4) Unit Weight of Soil - Bulk | Dry | Saturated and Submerged Unit Weight. https://expertcivil.com/unit-weight-of-soil-bulk-dry-saturated-and-submerged-unit-weight/. (5) Soil Unit Weight Technical Note - ABG Geosynthetics. https://abg-geosynthetics.com/technical/soil-properties/unit-weight/. (6) Chapter 2 Phase Relations - Geoengineer.org. https://www.geoengineer.org/storage/education/2290/general_file_collection/7907/siva-phases.pdf. (7) Chapter 2 Phase Relations - Geoengineer.org. https://bing.com/search?q=Define unit weight of Soil,also define bulk saturated and submerged density.