Vibratory amplitude recalibration · Tier 4 Final emissions audit · asphalt mat density verification with nuclear-gauge logs for paving contractors.
Each tier names the audit scope, drum / hydraulic checks, and documentation pack your project engineer of record can file with the owner.
| Tier | Inclusion | Drum / Hydraulic Audit | Documentation |
|---|---|---|---|
| T1 Highway Overlay | 24/7 dispatch · vibration circuit warranty window | Quarterly amplitude chart verify · scraper & spray-bar check | ISO 9001 audit pack + Tier 4 NOx log |
| T2 Base Course Soil | Scheduled padfoot / smooth shell rotation | Monthly centrifugal-force spot check · gradeability test | Proctor density trend chart |
| T3 Airport / Bridge Deck | Annual oscillation drum re-certification | Edge bevel gauge · anti-bounce sensor verify | Deck vibration limit report for structural engineer |
| T4 Municipal Night Work | Pre-season combination-roller calibration | Tire pressure remote · LED night package verify | Noise & mat density night-shift log |
Highway paving fleets lose density windows when amplitude drifts outside the manufacturer chart. Sakai field engineers bring calibrated accelerometers, sample vibration-circuit oil to ISO 4406 cleanliness targets, and leave a signed amplitude sheet on the roller before the next night shift. Soil compaction contracts get padfoot shell wear measured against lift thickness so embankment Proctor values stay inside the geotechnical specification instead of guessing pass counts.
Airport and bridge-deck work adds oscillation-mode verification so structural engineers can file vibration limits. Municipal night packages confirm low-idle Tier 4 Final behavior and LED coverage so urban overlays meet both density and community noise constraints. Every tier ends with a documentation pack your procurement manager can attach to the monthly owner report without rewriting vendor emails into formal language.
Lane kilometers, mix type (SMA / polymer / base), and roller class written into the service contract before the first site visit.
DPF / SCR sample under load to ISO 8178 C1 cycle — submitted to the project EHS officer with serial-linked NOx / PM logs.
Drum accelerometer check, spray-bar flow, scraper clearance, and nuclear-gauge density spot checks against Gmm / Proctor targets.
MTBF / MTTR plus ISO 4406 hydraulic cleanliness trend, signed by the Sakai compaction reliability lead for the fleet file.
Twenty-eight pages covering amplitude windows, density audit SOPs, and Tier 4 Final sampling for paving fleets.
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