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Aggregate Weight Verification Checklist

Use this checklist before ordering or accepting aggregate to verify site dimensions, density, compaction, wastage, moisture condition, truck capacity, and supplier unit.

✓50 Inspection Points
✓8 Verification Categories
✓Site Measurement Verification+
  • Length and width measured on site, not taken from architectural drawings alone.
  • Depth or thickness measured from the finished surface level, not from a reference mark.
  • For L-shaped or irregular areas, the area has been split into sub-rectangles and totalled.
  • For sloping ground, average depth has been used across the area.
  • Measurements have been cross-checked by a second person before entering into the calculator.
  • Site dimensions account for any formwork, shuttering, or edge beam width that reduces aggregate area.
✓Aggregate Type and Density Verification+
  • Aggregate type selected matches the material being ordered (e.g. 20mm granite, not generic coarse aggregate).
  • Bulk density value is appropriate for the source quarry and grading — not assumed from a different source.
  • If supplier has provided a tested bulk density, that value has been entered instead of the default.
  • For M sand, density reflects the actual manufactured source (values vary 1,650–1,850 kg/m³ by manufacturer).
  • For RCA (Recycled Concrete Aggregate), structural engineer approval is obtained before use in concrete.
  • Aggregate size matches the structural drawing specification (12mm / 20mm / 40mm as required).
  • IS 383:2016 classification of selected aggregate is appropriate for the intended application.
✓Compaction Factor Verification+
  • Compaction factor has been applied if the aggregate will be mechanically or manually compacted after placing.
  • Compaction factor is set to 0% for concrete batching aggregate (no compaction of loose aggregate before mixing).
  • GSB layers use a minimum 12% compaction factor per IRC SP:49 standard practice.
  • WMM layers use a minimum 10% compaction factor.
  • Backfill layers use compaction factor appropriate to compaction equipment available on site.
  • Compaction factor is not double-counted if volume was already measured in loose condition.
✓Wastage Factor Verification+
  • Wastage factor is at least 5% for any manually handled or poured aggregate work.
  • Wastage factor reflects site conditions — open-air sites with wind exposure use higher wastage for fine aggregate.
  • For trench or foundation backfill with irregular geometry, wastage is set to at least 8%.
  • For machine-laid road sub-base (GSB / WMM), wastage is between 5–7%.
  • Wastage factor accounts for residue left on truck beds after unloading.
  • Wastage has not been set to 0% unless the application genuinely has no handling loss (e.g. batching plant direct delivery into weigh hopper).
✓Moisture Condition Verification+
  • Moisture condition reflects the actual state of aggregate being delivered — not assumed to be dry during monsoon months.
  • If aggregate is sourced from a river or wet stockpile, Wet condition is selected.
  • For concrete batching mix design, SSD (Saturated Surface Dry) condition is used.
  • For backfill and sub-base ordering by weight, dry condition is used so order quantity is not overstated.
  • Supplier has been asked whether their quoted weight is for dry or wet aggregate before placing the order.
✓Order Quantity and Supplier Unit Verification+
  • Order quantity (with wastage) is used for the purchase order, not the base dry weight.
  • Supplier's quoted unit (tonne / quintal / brass / truck load) has been cross-checked against calculator output.
  • 1 brass = 100 cubic feet = 2.83 m³ has been used for brass-to-tonne conversion with supplier.
  • Truck capacity confirmed with the transporter — not assumed as 10 tonnes without verification.
  • If truck loads result in a fraction (e.g. 3.2 loads), procurement is rounded up to 4 full loads.
  • Partial truck load surcharges or minimum order quantities have been checked with supplier.
  • Aggregate rate quoted is per dry tonne — clarified with supplier if quote is per wet tonne.
✓Application-Specific Checks+
  • For concrete slab aggregate: coarse and fine aggregate quantities are calculated separately using the Concrete Mix Calculator.
  • For GSB sub-base: layer thickness matches the structural or road drawing, not a site assumption.
  • For plinth filling: finished floor level (FFL) and natural ground level (NGL) difference has been verified from drawings.
  • For trench backfill: depth used is the clear trench depth after pipe / duct placement, not the full excavation depth.
  • For filter media or drainage aggregate: void content and permeability requirements checked with design engineer.
  • For WMM road base: aggregate grading matches IRC Grade I or Grade II as specified in the road design report.
✓Before Placing the Order+
  • Final calculated quantity (with wastage) has been reviewed and approved by the site engineer or owner.
  • Aggregate supplier's source quarry and IS 383:2016 test certificate have been requested.
  • Delivery schedule confirmed — aggregate should not be stockpiled on site for more than 2–3 weeks to avoid segregation and contamination.
  • Storage area on site is prepared — clear, level, and away from soil contamination or surface water.
  • Number of truck loads and delivery sequence planned to avoid site congestion.
  • Payment terms and unit rate confirmed in writing before first delivery.
  • Calculator screenshot or export saved for project records.
Inspection Notes+
Use this checklist with the latest site measurements and supplier quotation.
Confirm whether the supplier quotes by tonne, brass, cubic feet, or truck load before finalizing order quantity.
Record compaction, wastage, moisture condition, and truck capacity assumptions for project records.
Common Mistakes+

Ordering Finished Volume Instead of Loose Quantity

Compacted layers usually need more loose material than the finished in-place volume. Add the correct compaction allowance for GSB, WMM, backfill, or sub-base work.

Using Generic Density Without Supplier Confirmation

Bulk density changes with source, grading, moisture, and aggregate type. Use supplier or lab-tested density when available.

Assuming Every Truck Is 10 Tonnes

Truck payload varies by vehicle and local loading practice. Confirm actual vehicle capacity and whether partial loads or minimum order quantities apply.

Related Calculators & Guides

Aggregate Weight CalculatorCalculate aggregate weight, tonnes, truck loads, wastage, compaction, and material cost.Aggregate Density CalculatorCheck aggregate bulk density, specific gravity, void content, and particle density.Concrete Mix Design CalculatorEstimate cement, sand, aggregate, water, and mix proportions.

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