scr_mix_calcs: Produce a soil with a known silt-to-clay ratio

In evanmascitti/soiltestr: Functions for Laboratory Soil Testing

Produce a soil with a known silt-to-clay ratio

Description

Compute air-dry component masses to use based on silt-size and clay-size mass percentages and extant water contents \loadmathjax In general, the return value of this function will be further processed and passed to sand_w_scr_mix_calcs(). This would be useful when blending with sand to yield a 3-component mixture with known sand content and SCR

Usage

scr_mix_calcs(
  final_OD_kg,
  scr,
  silt_silty,
  clay_silty,
  silt_clayey,
  clay_clayey,
  w_silty,
  w_clayey
)

Arguments

final_OD_kg	oven-dry mass of particles < 53 microns in final mixture (in kg)
scr	silt-to clay ratio, computed as \mjeqn\fracpercent silt-sizepercent clay-size
silt_silty	percent silt in the silty soil (decimal)
clay_silty	percent clay in the silty soil (decimal)
silt_clayey	percent silt in the clayey soil (decimal)
clay_clayey	percent clay in the clayey soil (decimal)
w_silty	gravimetric water content of silty soil (decimal)
w_clayey	gravimetric water content of clayey soil (decimal)

Value

a list of length 4. Elements include:

1. tibble with two columns: the air-dry mass of component A (the silty soil) and component B (the clayey soil)

2. A tibble with two columns: the oven-dry mass fraction of each component comprising the new mix (summing to 1)

3. The sand-size content (as a decimal) of the new mixture on an oven-dry basis

4. The gravimetric water content (as a decimal) of the new mix.

Examples

# this generates component masses which yield 100 kg of
# combined silt-size and clay-size particles.

new_fines_mix_data <- scr_mix_calcs(
  final_OD_kg = 100,
  scr = 2,
  silt_silty = 0.9,
  clay_silty = 0.06,
  silt_clayey = 0.43,
  clay_clayey = 0.54,
  w_silty = 0.001,
  w_clayey = 0.04
)
new_fines_mix_data

evanmascitti/soiltestr documentation built on Oct. 6, 2022, 5:32 p.m.