GEOSYSTEM - Version 4 -Grain Size Sieve and Hydrometer Testing Software

Data may be entered as either raw testing data or as final calculated test results (i.e., sieve size and percent passing): this allows you to chart pre-calculated grain size tests without having access to the original testing data. From your data GrainSize calculates fineness modulus, percentage diameters (e.g., D₁₀, D₃₀ and D₆₀), coefficient of uniformity (C_u) and curvature (C_c), and fractional components (e.g., the percentage of cobbles, gravel, sand, silt and clay in the material tested). Fractional components can be calculated based on the cobbles/gravel/sand/silt/clay particle sizes dictated by the user`s choice of ASTM, AASHTO, Wentworth, Burmister or Australian (AS 1726) standards.

Several different sieve testing methods (i.e., weighing each sieve and its retained material, or weighing a cumulative pan) are supported, and sieves may be entered as numbered (e.g., #10), inch-sized (e.g., 1") and/or millimeter-sized (e.g., 75mm.).

Hydrometer support includes automatic interpolation of hydrometer temperature correction values from a single correction reading, which eliminates the ASTM D 422 Section 7.2 multiple correction values requirement. Both 151H and 152H hydrometers are supported.

Interactive curve shaping facility lets you remove poor data points from the grain size distribution curve.

Grain size test data can be printed in a variety of different formats, including one that includes all of your raw test readings (this is handy for archiving your test data in paper form). Additionally, if the GEOSYSTEM Boring Log Drafting program is licensed, grain size values such as percent passing the #200 sieve are available for inclusion on boring log reports.