Compaction / Distribution Report

Inputs

Project / Location

Material / Layer

Proctor Standard Density (kg/m³)

Required Compaction (%)

Field Density Readings (kg/m³) — one per line

Estimation only. All compaction results must be verified by a licensed geotechnical engineer. Terms

Summary

—

average compaction (%)

Readings—

Min compaction—

Max compaction—

Passing readings—

Failing readings—

Pass rate—

→

Connected workflow Put these results in a daily report Your compaction average carries in as a QC sample — pass/fail status included.

Compaction Distribution Report

Record the field density and the Proctor maximum dry density from the lab.

Compaction % = field density ÷ Proctor density × 100.

Compare the result with the required percentage to mark Pass or Fail.

Formula Used

Compaction % = (Field Density ÷ Proctor Maximum Dry Density) × 100
Pass/Fail = Compaction % ≥ Required %

When to Use This Calculator

Use this for processing nuclear density gauge or sand cone test readings into a formatted compaction distribution report for QA/QC documentation and submittal.

When Not to Use This Calculator

This does not replace certified lab Proctor testing or licensed geotechnical sign-off. Use only as a field summary tool — final acceptance must follow your project's QA/QC specification.

Frequently Asked Questions

What's a typical required compaction percentage? ▾

Subgrade is commonly 95-98%, granular base 98-100%, and structural fill 95-98% of Standard Proctor — but always follow your specific project specification.

What if some readings fail? ▾

Failing readings typically require additional compaction passes and re-testing of that specific location before acceptance. Document the failure and retest per your QA/QC procedure.