TryBuildCalcConcrete Mix Design Verification Checklist
🕒 Last updated: June 28, 2026
Essential Checklist+−
Complete these critical checks before approving the work or proceeding to the next construction stage.
✓24 Inspection Points
✓5 Verification Categories
✓Design Brief & Target Strength+-
- Specified concrete grade confirmed from structural drawing — M20, M25, or as specified
- Target mean strength calculated — target = specified strength + margin for production variability
- Exposure class confirmed — determines minimum cement content and maximum w/c ratio
- Durability requirements identified — sulphate resistance, chloride resistance, or frost resistance
- Mix type confirmed — nominal mix (prescriptive) or design mix (performance-based)
- Workability target specified — slump or VeBe time for the method of compaction
- Mix design reviewed and approved by structural engineer before use in structural elements
✓Material Properties for Mix Design+-
- Cement grade and specific gravity confirmed for mix design inputs
- Coarse and fine aggregate specific gravity measured and used in calculations
- Aggregate bulk density measured — used for volume batching conversion
- Aggregate water absorption measured — mix water adjusted for absorption
- Sieve analysis performed on both aggregates — grading within applicable code limits
✓Mix Proportioning+-
- Water-cement ratio selected based on target strength — governing code's exposure limit confirmed
- Water content selected from a design-mix reference table for the given workability and aggregate size
- Cement content calculated from w/c ratio and water content — minimum and maximum checked
- Coarse and fine aggregate proportions determined — volume of each calculated
- Absolute volume of all mix components sums to 1.0 m³
✓Trial Mix & Validation+-
- Trial mix produced before first production pour — workability and strength confirmed
- Trial mix batch size at least 1/10 of the mixer capacity — not a small hand-mixed sample
- Slump tested immediately after trial mix — result compared to target workability
- Trial mix strength test results meet target mean strength at 28 days before production approval
- Mix design card issued to batching plant or site mixing team — quantities per batch confirmed
✓Standards & Documentation+-
- Mix design follows a recognized design-mix procedure — steps documented and traceable to a code
- Mix design complies with the governing code's minimum requirements for grade and exposure class
Full QC Checklist+−
Verification checklist for concrete mix design — covering target strength, water-cement ratio, material selection, mix proportioning, trial mix, and on-site quality control. Use the Essential Checklist for critical mix design and batching checks; expand to Full QC Checklist for complete mix design quality assurance from design through production.
✓30 Inspection Points
✓5 Verification Categories
✓Design Brief & Target Strength+-
- Specified concrete grade confirmed from structural drawing — M20, M25, or as specified
- Target mean strength calculated — target = specified strength + margin for production variability
- Exposure class confirmed — determines minimum cement content and maximum w/c ratio
- Durability requirements identified — sulphate resistance, chloride resistance, or frost resistance
- Mix type confirmed — nominal mix (prescriptive) or design mix (performance-based)
- Workability target specified — slump or VeBe time for the method of compaction
- Mix design reviewed and approved by structural engineer before use in structural elements
✓Material Properties for Mix Design+-
- Cement grade and specific gravity confirmed for mix design inputs
- Coarse and fine aggregate specific gravity measured and used in calculations
- Aggregate bulk density measured — used for volume batching conversion
- Aggregate water absorption measured — mix water adjusted for absorption
- Sieve analysis performed on both aggregates — grading within applicable code limits
- Fineness modulus of fine aggregate calculated — typically 2.60–3.10 for concrete sand
- Maximum aggregate size confirmed before mix design — affects void ratio and cement content
✓Mix Proportioning+-
- Water-cement ratio selected based on target strength — governing code's exposure limit confirmed
- Water content selected from a design-mix reference table for the given workability and aggregate size
- Cement content calculated from w/c ratio and water content — minimum and maximum checked
- Coarse and fine aggregate proportions determined — volume of each calculated
- Absolute volume of all mix components sums to 1.0 m³
- If admixture included in mix design — water reduction credited and cement reduced accordingly
✓Trial Mix & Validation+-
- Trial mix produced before first production pour — workability and strength confirmed
- Trial mix batch size at least 1/10 of the mixer capacity — not a small hand-mixed sample
- Slump tested immediately after trial mix — result compared to target workability
- Trial mix strength test results meet target mean strength at 28 days before production approval
- Mix design card issued to batching plant or site mixing team — quantities per batch confirmed
- Production concrete slump tested regularly — deviations reported immediately
- Mix design proportions displayed at batching plant — batcher can verify each batch
✓Standards & Documentation+-
- Mix design follows a recognized design-mix procedure — steps documented and traceable to a code
- Mix design complies with the governing code's minimum requirements for grade and exposure class
- Mix design report prepared and signed — engineer name, date, material sources, and trial results
Inspection Notes+-
Use the latest drawings, measured site inputs, supplier quotations, and material test information.
Complete all critical checks before ordering, accepting delivery, or approving the related work stage.
Record deviations and confirm rectification where required.
Inspection Notes
Use the latest drawings, measured site inputs, supplier quotations, and material test information.
Complete all critical checks before ordering, accepting delivery, or approving the related work stage.
Record deviations and confirm rectification where required.
Related Calculators & Guides
Concrete Mix Design CalculatorEstimate cement, sand, aggregate, water, and optional cost from ratio or grade inputs.Concrete Cement CalculatorEstimate cement bags and concrete material quantities for site planning.Concrete Mix Ratios ExplainedReview nominal mix ratios before comparing them with design mix assumptions.Concrete Grades M5 to M40Review concrete grades, strength, mix ratios, and typical applications.
FAQ
Use it after collecting the calculator inputs and again before placing orders, accepting delivery, or approving the related work stage.
No. It supports verification only. Final material approval, construction quality, and compliance must follow approved drawings, project specifications, applicable standards, and qualified professional review.