Building Materials Manufacturing worked example

Aggregate Blend Ratio with selected aggregate fraction in the blend of 18 tons: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop selected aggregate fraction in the blend to 18 tons, then walk the calculation through step by step. Calculate the percentage share of sand, gravel, recycled aggregate, or specialty aggregate in a blend.

The inputs for this scenario

  • Selected aggregate fraction in the blend: 18 tons (the input this scenario stresses; the baseline uses 35)
  • Total aggregate blend weight: 100 tons (held at the documented default)
  • Percent conversion multiplier: 100 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw aggregate blend ratio = selected aggregate fraction in the blend รท total aggregate blend weight.
  • Aggregate Blend Ratio works out to 18 % blend share at these inputs, and this is the headline figure for the scenario.
  • Raw aggregate blend ratio works out to 0.18 value at these inputs.
  • Percent conversion multiplier works out to 100 x at these inputs.
  • Total aggregate blend weight works out to 100 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where selected aggregate fraction in the blend sits at 35 tons and the headline result is 35 % blend share, this scenario comes in 48.57% below the baseline at 18 % blend share.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to selected aggregate fraction in the blend, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It is a weight-share ratio only; it says nothing about gradation curve fit, moisture content, or specific-gravity differences between fractions, which still must be checked separately.

Results at a glance

  • Aggregate Blend Ratio: 18 % blend share (headline result)
  • Raw aggregate blend ratio: 0.18 value
  • Percent conversion multiplier: 100 x
  • Total aggregate blend weight: 100 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Aggregate Blend Ratio calculator, set selected aggregate fraction in the blend to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.