Brick Freeze-Thaw Durability Test Log (ASTM C67)
Log freeze-thaw cycling results for sampled brick under ASTM C67, with traceability, specimen prep, chamber parameters, and post-test damage recorded in one place. Use it to document Grade SW qualification and support pass/fail decisions.
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Overview
This template is a structured inspection and audit log for recording freeze-thaw durability testing on brick specimens under ASTM C67. It is built to capture the information that matters for severe weathering brick qualification: project and batch traceability, sample source, target Grade SW classification, specimen condition before cycling, chamber settings, cycle completion, and the visible and measurable results after testing.
Use it when you need a defensible record for product qualification, supplier approval, submittal review, or project acceptance where freeze-thaw resistance is part of the specification. The log helps you document not just whether the brick passed, but how the test was run and what each specimen looked like before and after cycling. That matters when a result is questioned, when a lot is retested, or when a lab report needs to be tied back to a specific shipment or production run.
Do not use this template as a general masonry inspection checklist or for unrelated material tests. It is not meant for routine visual site inspection, mortar QA, or unrelated durability methods. It also should not replace the ASTM C67 procedure itself; it is the record of what was tested, how it was conditioned, what the chamber did, and what defects or mass changes were observed. If a specimen was interrupted, mishandled, or tested outside the intended conditions, that should be documented here as an anomaly rather than hidden in a summary line.
Standards & compliance context
- This template supports documentation for ASTM C67 freeze-thaw testing and helps preserve the evidence needed for severe weathering brick evaluation.
- The record structure aligns with quality management expectations under ISO 9001-style traceability and non-conformance control practices.
- If the brick is used in a regulated building application, the results may also support project review under applicable building code, fire-life-safety, or authority having jurisdiction requirements.
- Acceptance criteria should come from the project specification, manufacturer submittal, or governing standard family rather than from the template itself.
- Any failed result should be routed through your formal corrective action or non-conformance process so the disposition is documented and retrievable.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Identification and Traceability
This section ties the result to the exact project, batch, sample source, and standard reference so the test can be audited later.
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Project, batch, and test lot identification recorded
Record the project name, brick batch or lot number, and test lot identifier.
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Sample source and manufacturer documented
Identify the manufacturer, plant, product line, and sampling location or source.
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ASTM C67 freeze-thaw test reference confirmed
Confirm the test is being performed and recorded under ASTM C67 procedures.
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Target classification for Grade SW severe weathering documented
Confirm the test objective is to support Grade SW severe weathering qualification or equivalent durability evidence.
Specimen Condition and Preparation
This section records how many specimens were tested and what condition they were in before cycling, which is critical to interpreting durability results.
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Number of specimens tested
Enter the total number of brick specimens included in the test set.
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Specimens visually inspected before cycling
Confirm each specimen was inspected for pre-existing cracks, chips, spalls, or other defects before testing.
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Specimen dimensions recorded
Record measured dimensions or reference dimensions for the specimens used in the test.
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Pre-test specimen condition documented with photos
Attach photographs showing specimen condition before freeze-thaw cycling.
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Conditioning method and saturation state documented
Describe the conditioning method used before cycling, including moisture state or saturation procedure.
Freeze-Thaw Cycling Parameters
This section documents the actual test conditions, including chamber limits, cycle count, dwell times, water exposure, and calibration status.
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Test chamber temperature range within specified limits
Record the chamber temperature range observed during cycling.
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Freeze-thaw cycle count completed
Enter the number of cycles completed for the test set.
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Cycle duration and dwell times recorded
Document freeze and thaw dwell times, ramp times, and any hold periods used in the test sequence.
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Water exposure or immersion conditions documented
Record whether specimens were immersed, sprayed, or otherwise exposed to water during cycling and describe the method.
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Calibration status of chamber and measurement devices verified
Confirm temperature sensors, timers, and any balance or measurement devices were within calibration at time of test.
Post-Test Results and Defects
This section captures the observable evidence of freeze-thaw damage and any mass change so the outcome is based on measured and visible results.
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Visible cracking, spalling, or disintegration observed
Indicate whether any visible cracking, spalling, scaling, or disintegration was observed after cycling.
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Mass change recorded
Record the mass change for the specimen set before and after testing.
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Individual specimen damage summary documented
Summarize the condition of each specimen or identify any outliers, failures, or notable damage patterns.
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Post-test photographs captured
Attach photographs showing the final condition of the specimens after freeze-thaw cycling.
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Test anomalies or interruptions recorded
Document any chamber malfunction, power interruption, specimen handling issue, or other anomaly affecting results.
Compliance Review, Disposition, and Sign-Off
This section closes the loop by stating whether the brick met acceptance criteria and how any failure or corrective action was handled.
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Results meet project acceptance criteria for severe weathering brick
Confirm whether the observed results meet the specified acceptance criteria for Grade SW or project-defined durability requirements.
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Non-conformance or corrective action documented if failed
If the test did not meet criteria, document the non-conformance, disposition, and any corrective action required.
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Reference report number or laboratory record entered
Enter the linked report number, lab record ID, or chain-of-custody reference for traceability.
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Inspector or laboratory sign-off completed
Capture the signature of the responsible inspector, technician, or laboratory representative.
How to use this template
- Create a record for the specific project, batch, and test lot, then enter the brick manufacturer, sample source, ASTM C67 reference, and target Grade SW classification.
- Count and identify each specimen, record dimensions and pre-test condition, and attach photos that show the brick before freeze-thaw cycling begins.
- Document the conditioning method, saturation state, chamber temperature range, cycle count, dwell times, water exposure details, and calibration status for the chamber and measuring devices.
- Run the test and note any interruptions, deviations, or anomalies as they occur so the final record reflects the actual test conditions rather than a cleaned-up summary.
- After cycling, record cracking, spalling, disintegration, and mass change for each specimen, then add post-test photos and a specimen-by-specimen damage summary.
- Complete the compliance review by stating whether the results meet the project acceptance criteria, then route any failure for non-conformance, corrective action, and final sign-off.
Best practices
- Record the exact sample source and lot identifiers before testing so the result can be traced back to the correct production run.
- Photograph every specimen before and after cycling, and keep the images tied to the specimen ID rather than the batch as a whole.
- Capture the conditioning method and saturation state in plain language, because freeze-thaw results are highly sensitive to how the brick was prepared.
- Verify chamber calibration and measurement device status before the run, and note the verification date in the log rather than relying on a separate file.
- Document mass change to the same units and precision for every specimen so results can be compared across lots.
- Treat interruptions, temperature excursions, and water exposure deviations as test anomalies, not as minor notes, because they can affect validity.
- Separate cosmetic surface blemishes from true freeze-thaw damage, and describe observable defects such as cracking, spalling, or disintegration specifically.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this brick freeze-thaw durability test log cover?
This template records the full ASTM C67 freeze-thaw test trail for sampled brick, from project and lot identification through specimen preparation, cycling conditions, and post-test damage. It is designed to document whether brick intended for severe weathering use meets the project’s acceptance criteria. The log also captures calibration status, anomalies, and final disposition so the record stands on its own.
When should I use this template instead of a general material inspection form?
Use it when you need a dedicated record for freeze-thaw durability testing of brick, especially when evaluating Grade SW severe weathering brick. A general inspection form usually misses critical details like cycle count, saturation state, chamber limits, and mass change. If you only need receiving inspection or visual masonry QA, this template is more detailed than necessary.
Who should complete the log?
A qualified laboratory technician, quality inspector, or materials engineer should complete it, depending on your testing workflow. The person recording results should be able to verify specimen identity, observe defects, and confirm that the chamber and measuring devices were in calibration. Final sign-off should come from the lab lead, QA manager, or project authority responsible for acceptance.
How often is this log used?
It is typically completed for each test lot, batch, or sampled shipment that requires freeze-thaw qualification. If a project has multiple brick sources or production runs, each source should have its own record rather than combining results. Re-testing is also appropriate after a formulation change, manufacturing change, or failed initial result.
Does this template align with ASTM C67 requirements?
Yes, it is structured to capture the evidence normally needed to document an ASTM C67 freeze-thaw evaluation without inventing extra steps. It helps you record the specimen condition, cycling parameters, and observed deterioration that drive the result. You should still follow the current ASTM C67 procedure and any project-specific acceptance criteria when performing the test.
What are the most common mistakes when using a freeze-thaw test log?
Common mistakes include missing the specimen source, failing to note the saturation or conditioning method, and not recording the actual cycle count completed. Another frequent issue is documenting only a pass/fail outcome without describing cracking, spalling, mass change, or interruptions. Photos taken after the fact, rather than at the time of inspection, also weaken the record.
Can I customize this log for different brick products or project specs?
Yes, and you should. You can add fields for manufacturer lot codes, project acceptance thresholds, specimen dimensions, or client-specific reporting references. If your project uses additional durability checks or a different grading scheme, keep the ASTM C67 fields intact and add the extra criteria as separate sections.
How does this compare with ad-hoc lab notes or spreadsheets?
Ad-hoc notes often leave gaps in traceability, especially when multiple specimens, cycles, or observers are involved. This template gives you a consistent structure for the same data points every time, which makes review, audit, and comparison between lots much easier. It also reduces the chance that a failed specimen or test interruption is overlooked.
What should I do if the brick fails the acceptance criteria?
Record the non-conformance clearly, including the observed defects, affected specimens, and any test anomalies that may have influenced the result. Then route the result for corrective action, supplier review, or project disposition according to your QA process. Keep the laboratory record and reference report number linked so the failure can be traced later.
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