Modern asphalt rollers can incorporate technology that guarantees paving jobs meet strict specifications for compaction and smoothness. Connectivity between machines is becoming an increasingly important part of the process.
Connected rollers that share information across a job site can complete their work faster and with better results. At the same time, the data collected by each roller can be stored, analyzed, and used in many ways – as part of future bids, for quality control purposes, and for training new labour.
Interest in connected compaction is growing
For BOMAG, connected compaction has grown steadily over the past several years. It started with the BOMAP app, providing users with access to various equipment and project details. It expanded with BOMAP Connect, which brings the entire compaction equipment fleet together.
Chaunce Edwards, product manager with SMS Equipment, explains that BOMAP Connect aims to ensure that roller crews reach their target density and compaction levels across each project in a user-friendly manner. Based on an Android tablet and a downloadable app, this brand-agnostic system uses sensors on the BOMAG machine – and other brands – to collect data.
“Historically, operators would rely on experience or have a foreman who would say they had to hit a certain area five or six times to reach their target,” Edwards describes. “What the BOMAP system does is . . . as we’re compacting an area, it will paint out a grid and determine how many times you have been over a certain area.”
As rollers move across those locations, the colours on the map change, providing operators with a visual indication of the compaction quality in those areas. A ten-point scale is used to determine the level of compaction – a 7 or 8 is a good target, while a 10 is over-compacted.
Knowing the level of compaction on each part of the job site ensures neither over- nor under-compaction takes place. The result, Edwards says, is that you burn less fuel and reduce the environmental footprint of the job. Costs are reduced, and overall efficiency is improved.
Live compaction data can also help you recognize potential problems before they occur. Edwards offers the example of a roller crew that can reach a compaction level of 8 across most sites but only a 4 in a particular location. This may be an indicator of a failing utility below the road or a problem spot in the gravel base that should be investigated before the job is completed.
When set up on a tablet in the machine, BOMAP Connect uses the tablet’s GPS signal to plot the machine’s location. Accuracy can be improved by adding a GPS antenna to the machine, giving position accuracy up to 20 centimetres. This is more than enough accuracy for a roadway or similar project, Edwards says. Millimetre accuracy can be achieved by connecting to base stations on the site.
“Most of our customers have found that the 20 centimetre accuracy works for them. Generally, we are overlapping passes slightly anyways to ensure overall coverage,” he notes.
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