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GSSI, Hamm AG Present RealTime Density Scan for Asphalt

GSSI and Hamm AG collaborate to introduce RealTime Density Scan for asphalt compaction. The sensor integrates with Smart Compact, offering real-time quality control for smoother, more durable roads. Partners aim to revolutionize industry standards with accurate, innovative technology.

Mon March 31, 2025 - National Edition
GSSI


GSSI has reached a long-term agreement with Hamm AG to integrate a key new sensor to its digital compaction assistant Smart Compact for tandem rollers.

The agreement enables a new era in asphalt compaction technology for real-time quality control (QC) and for quality assurance (QA) on asphalt paving jobs.

Hamm and GSSI have worked closely to create RealTime Density Scan, a high-speed, accurate sensor that can handle the harsh paving conditions of vibration, dirt, moisture and temperature under a roller. Roller operators have the compaction control they need to ensure uniform densities and to create longer lasting roads using less energy.

"Given the trajectory of Density Profiling Systems in the industry, the natural next step in the PaveScan ecosystem was to integrate this technology into asphalt rollers," said GSSI President Chris Green. "This agreement with Hamm combines the long-standing strengths of each company to provide customers with a truly innovative solution on a large scale. We couldn't be more excited about working with Hamm and the future of DPS."

GSSI has been working on the core GPR sensors and algorithms required to deliver accurate results across a large range of compaction scenarios for a number of years.

"This is a hard problem to solve at the accuracies required," said GSSI CTO David Cist. "DOTs pay bonuses for good density because their research shows that each 1 percent change in compaction can extend or shorten road life by 10 percent or more. Since water is the enemy of all roads, getting good densities over the entire job is key to longer road life, since it seals out salt and water. However, the problem has always been that paving contractors have meager feedback for rolling asphalt to the right density. Knowing surface temperature, roller pass count and stiffness are all great, but they can never be combined to give the density values contractors need at the accuracy DOTs pay for. Gauges and cores provide only spot density values, typically too late and too sparse to assure longevity."

PaveScan technology has been used by numerous domestic and international DOTs for many years, according to GSSI. The first few years of this work was primarily focused on quality assurance — making sure the road meets specifications after the job is done. The next step was to work with DOTs and contractors around the world to design a system that allows for real-time process control which enables contractors to fix problems during the job, rather than just pay for them after the job is over. This is a win-win for everyone involved. Extensive testing, across a variety of conditions, consistently shows that PaveScan products in the plant and on the asphalt mat provide actionable density information at all stages of the process, something that hasn't been possible before.

A growing portion of GSSI's business is what it calls industrial integration in diverse fields, from measuring whiskey barrels to refractory bricks.

"Our job is to create the best GPR sensors in the world and then work with partners to create innovative solutions that have the potential to revolutionize industries," said Green. "Every problem is unique, but the goal is always the same, make something that customers quickly decide that they can't live without."




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