ASTM D4546-21 defines standard procedures for measuring one-dimensional swell or settlement in cohesive soils, providing three distinct methods to assess expansive or collapsible behavior under varying pressures. This standard is crucial for geotechnical engineering, enabling accurate predictions of soil reaction to wetting to prevent foundation and structural failure. The official PDF can be purchased on the ASTM International website.
ASTM D4546-21 establishes laboratory test methods (A, B, and C) to determine the one-dimensional swell or collapse of soils, crucial for assessing foundation stability. This updated standard focuses on measuring free swell, swell pressure, and hydrocompression to predict soil behavior under moisture changes. To access the full standard document, visit ASTM International. astm d454621 pdf
The change in height divided by the height immediately prior to wetting. Percent Heave ( HVncap H cap V sub n ): Method A (Free Swell): The specimen is loaded
The ASTM D4546-21 standard has a wide range of applications in geotechnical engineering, including: If you actually meant a different standard number
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By following the ASTM D4546-21 protocol, engineers can quantify these risks and design structures to accommodate or mitigate them, saving millions in potential repairs.
ASTM D4546-21: Standard Test Methods for Low-Pressure Air Dryer Systems