Which combination of records provides complete traceability for a concrete batch's materials?

• A. Admixture label, batch ticket, and mix design.
• B. Vendor invoice, delivery ticket, and color sample.
• C. Weather log, project schedule, and safety plan.
• D. Calibrations, maintenance logs, and equipment list.

Answer: (A)

Complete traceability of a concrete batch’s materials requires records that tie the batch to the exact materials and amounts used, based on the approved plan. An admixture label identifies the specific additive and its dosage for that batch, the batch ticket records the actual materials and quantities that went into the mix (including cement, aggregates, water, and any additives) along with the batch identifier, and the mix design specifies the approved proportions and material types to be used. Together, these three documents create a clear, verifiable trail from design to production, so inspectors can confirm what was planned, what was actually used, and that the batch meets the specified requirements.

Other options don’t provide the same complete material traceability. A vendor invoice, delivery ticket, and color sample may show what was delivered or observed color, but they don’t guarantee the exact mix proportions or confirm the batch’s adherence to the design. Weather, project schedule, and safety plan focus on conditions and planning rather than material provenance. Calibrations, maintenance logs, and equipment lists pertain to equipment reliability and readiness, not the materials and their quantities in the concrete.