grainSize: Grain-Size Distribution Functions

Description Usage Arguments Details Value Note Author(s) See Also Examples

Description

These functions compute diferent aspects related to grain-size distributions of soil.

Usage

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size.from.sieve(sieve, metric)
grainSize.plot(sieve = NA, size = NA, percent, metric)
percentComponents(sieve = NA, size = NA, percent, metric)
Dsize(N, sieve = NA, size = NA, percent, metric)
grainSize.coefs(percent, sieve = NA, size = NA, D10 = NA,
                D30 = NA, D60 = NA)

Arguments

sieve

vector of sieve numbers according to ASTM D422

size

vector of grain sizes (in or mm)

percent

vector of percent passing

metric

logical variable: TRUE for metric units (mm), FALSE for English units (in)

N

the percent corresponding to the desired D-size

D10

D-size corresponding to 10 percent passing

D30

D-size corresponding to 30 percent passing

D60

D-size corresponding to 60 percent passing

Details

Value

Note

The Dsize function uses logarithmic interpolation to calculate the D-size from the provided grain-size distribution. Log-linear extrapolation is used for grain sizes beyond the range of the data, and a warning is provided.

Author(s)

James Kaklamanos <kaklamanosj@merrimack.edu> and Kyle Elmy <ElmyK@merrimack.edu>

See Also

USCS, AASHTO, Plasticity

Examples

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##  Example 1:  Grain-size distribution

##  (a) Define data
sieve.example <- c(3/8, 4, 10, 20, 40, 140, 200)
percent.example <- c(95.72, 90.23, 81.49, 66.36, 50.00, 8.51, 4.82)

##  (b) Percent gravel, sand, and fines
percentComponents(sieve = sieve.example, percent = percent.example,
                  metric = TRUE)

##  (c) Plot grain-size distribution
grainSize.plot(sieve = sieve.example, percent = percent.example,
               metric = TRUE)

##  (d) Calculate D50
Dsize(N = 50, sieve = sieve.example, percent = percent.example,
      metric = TRUE)

##  (e) Coefficients of uniformity and curvature
grainSize.coefs(sieve = sieve.example, percent = percent.example)


##  Example 2:  coefficients of uniformity and curvature
grainSize.coefs(D60 = 0.10, D30 = 0.03, D10 = 0.002)  

geotech documentation built on May 29, 2017, 11:52 a.m.

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