Observed arrival · 2026-11-06

ProofGrit makes construction-test calculations checkable

proofgrit.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

Software for small construction materials testing labs, with calculators and a workflow for turning test readings into reports.

Landing page captured for the 2026-11-06 issue.

For: Small U.S. construction materials testing labs
Worth noticing: Cylinder specimens below an L/D of 1.00 are flagged rather than silently accepted.

Field notes

The examples show sample outputs for ASTM C39 cylinder strength and ASTM D698 Proctor testing, alongside the inputs used. The page describes interpolated correction for short specimens and says values under an L/D of 1.00 are flagged. It also specifies rounding for reported strength, density, moisture, and compaction, and says acceptance decisions use the reported value.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

⊠LoginAccess appeared gated

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

One card from the complete issue

Trucking by Ear

327,539 arrived 1,000 judged 984 catalogued Enter the complete issue