Astm D4546-21 Pdf [hot] Jun 2026

The standard describes laboratory test methods used to measure the vertical deformation of a soil specimen. It is specifically designed for cohesive soils that have the potential to change volume significantly upon wetting. These soils are often referred to as "expansive soils" (like bentonite or high-plasticity clays) or "collapsible soils" (such as certain silts or loess).

A: No. ASTM D2435 tests primary consolidation under existing moisture. ASTM D4546 tests the change caused by adding water. D4546 must not be performed on saturated samples; D2435 can be. Astm D4546-21 Pdf

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No. ASTM D2435 covers consolidation (time-dependent compression of saturated soils). ASTM D4546 specifically covers volume change due to wetting, not load. D4546 must not be performed on saturated samples;

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ASTM D4546-21 describes three alternative test methods to measure the magnitude of (volume increase) or collapse (sudden volume decrease upon wetting) of soils when subjected to changes in water content under one-dimensional (vertical) loading conditions.