Identify the actual material change
“The cement changed” is not a complete trial brief. Record manufacturer, cement designation, source, lot or delivery reference, receipt date and the available certificate for both materials. Note changes in SCM identity or proportion separately. A cement trade name alone may not identify the tested batch.
Keep the current PCE grade and lot in the same record. If both cement and admixture changed, label both changes; do not attribute the outcome to one supplier from the combined comparison. Ask each supplier to confirm document identity and whether the provided evidence covers the material actually delivered.
Agree a comparison with the technical team
The following is a proposed enquiry matrix, not a laboratory procedure or an instruction to run unapproved batches. The producer or responsible laboratory should choose applicable methods, quantities and acceptance criteria.
| Combination | Buyer question |
|---|---|
| Old cement + current PCE | What is the traceable reference result? Identify retained material or historical evidence and its limitations. |
| New cement + current PCE | What response changed under comparable documented conditions? |
| New cement + candidate PCE | Does the candidate satisfy the same agreed criteria, rather than only improve one flow reading? |
If old cement is unavailable, disclose that a simultaneous reference cannot be repeated. Historical results may support context, but a different season, mix or test method weakens direct comparability.
Specify what the report needs to show
Request batch identities, product-mass and binder basis, water accounting, mixing record, sampling times and concrete temperature. Ask for the relevant fresh and hardened results against the agreed target. NRMCA’s testing service lists fresh-concrete and strength checks as distinct measurements; initial flow alone is not the whole evaluation.
Record other admixtures too. Sika’s general admixture guide calls for specific compatibility testing where multiple admixtures are used. Its guidance is background, not an approval of AdmixChem grades or a universal dose instruction.
Require the laboratory to flag changed variables, missing measurements and deviations. A neat summary table should not hide a different binder content or a later sampling time.
Turn the results into a supplier request
Send the candidate supplier the new cement identity, current PCE documents, traceable comparison and required operating window. Request a named grade and a sample matched to the document revision. Ask which application evidence is available and what remains to be evaluated locally.
Keep the quotation conditional on the agreed evaluation. State estimated purchase quantity, destination, packaging preference, required lead time and quote currency. If the supplier offers several grades, ask what target each is intended to address rather than treating all PCE liquids as interchangeable.
Keep the decision boundaries visible
Record who reviews the results and what evidence is still missing before purchase approval. The compatibility guide owns the general diagnostic sequence; the document checklist helps compare grade identity and report scope.
For an HFC-1001 enquiry, retain the additional questions in its grade-specific checklist. No generic retest record confirms structural suitability, demoulding time or a safe adjustment to a delivered load. Those decisions remain with the responsible technical team and applicable project requirements.
Prepare your enquiry
Old/new cement identities, current PCE grade, comparable report, unresolved target, sample quantity and destination.
Request the exact grade, current document availability, sample terms, net package mass, quotation validity and delivery terms. Suitability and performance remain subject to applicable documents and agreed evaluation.
Sources and scope
Sources provide general background or measurement scope. The buyer checklists are our editorial recommendations, not reproduced test standards or proof of product performance. Reviewed 9 October 2026.