Trimble Roadworks Adds GPR Sensor for Asphalt Compaction Data

Why It Matters

Real‑time compaction data lets contractors adjust roller patterns instantly, reducing costly rework and penalties while enhancing pavement longevity. This capability strengthens project profitability and safety for highway agencies.

Key Takeaways

• Trimble Roadworks now integrates GSSI PaveScan RS sensor.
• Real-time dielectric profiling replaces post‑project core sampling.
• Early compaction alerts reduce rework and penalties.
• Global aftermarket resale expands sensor availability for contractors.

Pulse Analysis

Asphalt compaction quality has long been measured by periodic core samples taken after a paving job is complete. While cores provide accurate density readings, they are labor‑intensive, disruptive, and offer only a snapshot of a much larger surface. Contractors therefore rely on experience and roller patterns to infer compaction, which can lead to over‑ or under‑compaction and subsequent pavement distress. The industry has been seeking a non‑destructive, continuous monitoring solution that delivers actionable data without halting production.

Trimble Roadworks now incorporates GSSI’s PaveScan RS ground‑penetrating radar (GPR) sensor, delivering high‑speed dielectric profiling on every roller pass. By measuring the percentage of air voids, the system translates radar reflections into real‑time compaction metrics that appear directly within the Roadworks interface. This integration eliminates the need for post‑project coring, allowing crews to spot low‑density zones instantly and adjust roller speed, pressure, or pass overlap. The combined platform also benefits from Trimble’s SITECH dealer network, which will resell the GPR units globally, ensuring broader field availability.

The ability to verify compaction as it happens has immediate financial and safety implications. Early detection reduces rework, avoids penalties tied to specification non‑compliance, and shortens project schedules, directly boosting contractor margins. For highway agencies, consistent pavement performance translates into lower maintenance costs and extended service life. Moreover, the non‑destructive nature of GPR improves crew safety by limiting exposure to heavy equipment and core‑drilling activities. As more contractors adopt real‑time GPR monitoring, the standard for asphalt quality assurance is poised to shift toward continuous, data‑driven processes.