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The target volume the mix design was intended to produce. Any volume unit works, as long as the measured yield below uses the same one.
For a full-load trial batch this is usually the truck's rated capacity.
The actual volume the trial batch produced, measured per ASTM C138 and stated in the same unit as the design volume above.
Computed from the batch's total mass divided by its measured unit weight — see the Concrete Unit Weight Calculator.
The quantity of one ingredient — cement, say — used in the trial batch.
Run this once per ingredient (cement, water, each aggregate) to get the full corrected mix design.
Adjusted ingredient quantity
785.7 lb
- Correction factor
- 1.02
They open the calculator with your figures already in it
Concrete Trial Batch Yield Adjustment Calculator: 786 lb — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- ASTM C138 trial batch adjustment procedure: correction factor = design volume / actual measured yield, applied to every ingredient quantity in the mix
Inputs used
- Design Batch Volume
- 1
- Actual Measured Yield
- 0.98
- Original Ingredient Quantity
- 770 lb
Intermediate steps
- Correction factor
- 1.02
What this calculation does not cover
- The correction factor rescales every ingredient by the same amount, so it fixes the batch size and nothing else. It does not tell you why the yield missed — air content, aggregate moisture, scale calibration and assumed specific gravities all move yield, and scaling the mix up carries whatever caused the miss into the corrected quantities.
- Aggregate moisture is not handled. Design quantities are normally stated at saturated surface-dry condition, and the water actually batched has to be corrected for free moisture in the sand and stone; that adjustment is separate from this one and still has to be applied.
- The answer is only as good as the yield measurement behind it. An out-of-calibration measure, an under-consolidated sample or a mis-read scale gives a false yield, and this calculation multiplies that error into every ingredient weight in the mix.
- It assumes the trial batch was actually proportioned the way the design specified. If an ingredient was mis-weighed or a bag was short, the measured yield describes a different mix, and correcting it to the design volume locks that error in at production scale.
- This is not a mix design and it is not a compliance check. Corrected quantities still have to be proved by testing — slump, air content and strength cylinders — before the mix is released to production.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.1.1
Regulatory standards & verification citations1
- ASTM C138 trial batch adjustment procedure: correction factor = design volume / actual measured yield, applied to every ingredient quantity in the mix
Which documents these citations point at
Standards referenced: ASTM C138 (ASTM International, United States).
Cite this page
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