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The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil: ... The procedure is defined in ASTM Standard D 4318. If the soil is ...
The formal procedure is described in ASTM D6913-04(2009). [8] ... If the Atterberg limits plot in the"hatched" region on the graph near the origin, the soils are ...
Coarse-grained soils, mainly gravels or sands, are graded as either well graded or poorly graded. Poorly graded soils are further divided into uniformly-graded or gap-graded soils. Fine-grained soils, mainly silts and clays, are classified according to their Atterberg limits. [1] [6]
Atterberg limits The Atterberg limits define the boundaries of several states of consistency for plastic soils. The boundaries are defined by the amount of water a soil needs to be at one of those boundaries. The boundaries are called the plastic limit and the liquid limit, and the difference between them is called the plasticity index.
Albert Mauritz Atterberg (19 March 1846 – 4 April 1916) was a Swedish chemist and agricultural scientist who created the Atterberg limits, which are commonly referred to by geotechnical engineers and engineering geologists today. In Sweden he is equally known for creating the Atterberg grainsize scale, which remains the one in use.
The common procedures in use today for identifying the preconsolidation pressure in an overconsolidated soil were also due to Casagrande. In relation to his work on Atterberg limits, the "A-line" on plasticity charts may well be named after him. [1]
The wind bends palm trees as the Eaton Fire moves through the area on Jan. 8, 2025, in Altadena, CA. Fueled by intense Santa Ana Winds, the Palisades Fire has grown to over 2,900 acres, and 30,000 ...
The consolidation curve for a saturated clay showing the procedure for finding the preconsolidation pressure. Using a consolidation curve:(Casagrande 1936) [6] Choose by eye the point of maximum curvature on the consolidation curve. Draw a horizontal line from this point. Draw a line tangent to the curve at the point found in part 1.