Determine the USCS symbol for fine-grained soils — USCS.fine.symbol • GMisc

Classifies silt and clay soils according to the Unified Soil Classification System (USCS / ASTM D2487) using the Atterberg limits and the A-line.

Usage

USCS.fine.symbol(LL, PL = NA, PI = NA)

Arguments

LL: Numeric. Liquid limit (percent).
PL: Numeric. Plastic limit (percent). Default NA; used to compute PI when PI is not provided.
PI: Numeric. Plasticity index (percent). Default NA; computed as LL - PL when not supplied.

Value

A character string with the USCS group symbol (e.g. "CL", "MH", "CL-ML").

Details

This function is taken from the "geotech" package from James Kaklamanos

See also

Other soil mechanics, classification: Dsize(), USCS(), USCS.coarse.symbol(), grainSize.coefs(), percentComponents(), size.from.sieve()

Examples

USCS.fine.symbol(LL = 40, PL = 20)
#> [1] "CL"
USCS.fine.symbol(LL = 60, PI = 25)
#> [1] "MH"