This note is a compact reference note that brings together practical definitions, typical value ranges, and commonly used empirical correlations for sand, with frequent pointers to the original literature and a consistent reminder that correlations have limits and should only be applied within their intended scope. The content is organized into four parameter groups, each presented as its own table: (1) dilatancy and strength parameters—including relative density, critical-state and peak friction, dilatancy measures, and CPT-based correlations—intended for simpler strength and deformation descriptions; (2) critical-state and critical-state–based parameters, such as the critical-state void ratio and the state parameter , used to interpret whether a sand is likely contractive or dilative and to support more state-aware assessments; (3) small-strain stiffness parameters for the Hardening Soil Small (HSS) framework, centered on Gmax and strain-dependent stiffness reduction; and (4) intergranular strain overlay parameters used with hypoplastic models when full calibration data are not available. Taken together, the tables function as a practical parameter-selection cheat sheet that links common index and test inputs (e.g., CPT, triaxial results, grain-size descriptors) to parameters used in Mohr–Coulomb (MC), Hardening Soil (HS), Hardening Soil Small (HSS), and hypoplasticity (HP) models, while emphasizing careful, context-aware application and encouraging readers to consult the primary sources.
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