ASTM D4546-21 defines laboratory methods for measuring one-dimensional, wetting-induced swell or collapse of soils to evaluate ground movement. The standard outlines three methods—Method A, B, and C—to determine parameters such as swell pressure, free swell, and consolidation under specific loading conditions. For technical details and to purchase the standard, visit the official ASTM International
% change in height=(Δhhpre-wetting)×100% change in height equals open paren the fraction with numerator delta h and denominator h sub pre-wetting end-sub end-fraction close paren cross 100 astm d454621 pdf
Conclusion
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