concr_mix_lightweight_strength: Concrete Mix Design for Structural Lightweight Concrete

In iemisc: Irucka Embry's Miscellaneous Functions

Concrete Mix Design for Structural Lightweight Concrete

Description

Calculates the amount of cement, sand, gravel, and water needed for a test batch volume of structural lightweight concrete using the weight method. Note: Currently, this function only works with air-entrained concrete as the author has not found a table to compute the weight of concrete for nonair- entrained concrete.

Usage

concr_mix_lightweight_strength(
  fc,
  slump_use = NULL,
  max_size_aggr,
  FM,
  sgf_coarse,
  dry_rod_wt_aggr,
  absorp_coarse,
  absorp_fine,
  entrainment = c("Nonair", "Air"),
  construction_type = c("Beams and reinforced walls", "Building columns", "Floor slabs"),
  slump_value = c("Maximum", "Maximum + 1", "Minimum", "Minimum + 1"),
  exposure = c("Mild", "Moderate", "Extreme"),
  structure_type = c("Thin section", "Other"),
  severe_exposure = c("Wet", "Sea water"),
  trial_batch = c("1 cubic yard", "1 cubic foot", "0.5 cubic foot", "0.2 cubic foot",
    "All")
)

Arguments

fc	numeric vector that contains the concrete compressive strength (psi)
slump_use	numeric vector that contains the amount of slump (in)
max_size_aggr	numeric vector that contains the maximum aggregate size (in)
FM	numeric vector that contains the "Fineness Modulus of sand" (dimensionless)
sgf_coarse	numeric vector that contains the "specific gravity factor" of the coarse aggregate (dimensionless)
dry_rod_wt_aggr	numeric vector that contains the dry rodded weight of aggregate ["oven-dry loose weight of coarse aggregate"] (lb/ft^3)
absorp_coarse	numeric vector that contains the absorption of the coarse aggregate (whole number percent)
absorp_fine	numeric vector that contains the absorption of the fine aggregate (whole number percent)
entrainment	character vector that contains either Air or Nonair entrainment
construction_type	character vector that contains the intended type of construction
slump_value	character vector that contains the slump value (Maximum, Maximum + 1, Minimum, or Minimum + 1). It is "+ 1 in. for methods of consolidation other than vibration"
exposure	character vector that contains the exposure value (Mild, Moderate, or Extreme) for use with Air entrained concrete mixes
structure_type	character vector that contains the severe exposure value ["Thin sections (railings, curbs, sills, ledges, ornamental work) and sections with less than 1 in. cover over steel" or "All other structures"] for use with Air entrained concrete mixes with severe exposure
severe_exposure	character vector that contains the severe exposure value ("Structure wet continuously or frequently and exposed to freezing and thawing" or "Structure exposed to sea water or sulfates") for use with Air entrained concrete mixes with severe exposure
trial_batch	character vector that contains the volume of the trial batch mix to return (1 cubic yard, 1 cubic foot, 0.5 cubic foot, 0.2 cubic foot, or All)

Value

the amounts of cement, sand, gravel, and water in lb, rounded to the hundredth, as a list to make 1 yd^3, 1 ft^3, 0.5 ft^3, or 0.2 ft^3 of structural lightweight concrete or as a data.table containing all batch volumes.

Author(s)

Irucka Embry, Hans Werner Borchers for the interp1 and interp2 functions from pracma

Source

1. r - Error when doing bilinear interpolation with 'interp2 pracma'; any better way for 2D interpolation? - Stack Overflow answered and edited by Zheyuan Li on Dec 8 2016. See https://stackoverflow.com/questions/41032225/error-when-doing-bilinear-interpolation-with-interp2-pracma-any-better-way.

2. r - data.table 1.10.0 - why does a named column index value not work while a integer column index value works without with = FALSE - Stack Overflow answered and edited by Matt Dowle on Dec 8 2016. See https://stackoverflow.com/questions/41032225/error-when-doing-bilinear-interpolation-with-interp2-pracma-any-better-way.

References

ACI Committee 211, Standard Practice for Selecting Proportions for Structural Lightweight Concrete (ACI 211.2-98), American Concrete Institute, Farmington Hills, MI, 18 pages. 1998, 211.2-98.

See Also

concr_mix_normal_strength for Concrete Mix Design for Normal Strength (Normal-weight) Concrete

Examples

library(iemisc)

# Example A from Section 3.2.3 using the 'Weight method (specific gravity
# pycnometers)' from ACI Committee 211
# Design a concrete mix for 3500 psi concrete strength, 'floor slab of a
# multistory structure subjected to freezing and thawing during
# construction', and a maximum size of aggregate = 3/4 in, with Fineness
# Modulus of sand = 2.80, 'the oven-dry loose weight of coarse aggregate' =
# 47 lb/ft^3 with a specific gravity factor = 1.50, and a absorption of
# 11.0\% for the coarse aggregate and 1.0\% for the fine aggregate.

concr_mix_lightweight_strength(fc = 3500, max_size_aggr = 3 / 4, FM = 2.80,
sgf_coarse = 1.50, dry_rod_wt_aggr = 47, absorp_coarse = 11.0,
absorp_fine = 1.0, entrainment = "Air", construction_type = "Floor slabs",
slump_value = "Maximum", exposure = "Extreme", structure_type = "Other",
severe_exposure = "Wet", trial_batch = "1 cubic foot")

iemisc documentation built on June 22, 2024, 9:45 a.m.