Field evaluation of roller integrated intelligent compaction monitoring
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Field evaluation of roller integrated intelligent compaction monitoring

  • 2016-05-01

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      DOTD conducted a demonstration project to evaluate intelligent compaction (IC). The project developed specifications, which allo wed and incorporated the IC rollers on the project. The specification went through th e competitive bidding process and produced a wide range of cost numbers. The item for the soil roller had a range of bids from $15,000 to $95,000. The item for the asphalt roller ha d a range in bids from $7,000 to $100,000. The range may be attributed to the lack of knowle dge and familiarity within Louisiana regarding the intelligent compaction technology. This proj ect sought to increase the knowledge base of IC in Louisiana. DOTD/LTRC hosted a showcase on the pilot pr oject, which provided presentations from researchers, FHWA, and manufacturers. Th e showcase highlighted the US 90 Frontage Roads project, which collected both soil and as phalt data with two different rollers. The project was well attende d and well received. Manufacturer equipment and software training/su pport are critical to th e success of an IC project, which includes good co mmunication throughout. In this case, the contractor had relationships with each roller ma nufacturer, and LTRC was able to interact with roller and manufacturer. Initial setup of roller and GPS connections was a challenge with both project rollers, as LTRC local roller representatives a nd the contractor were generally learning about the details of the technology for the first time. National roller represen tatives were helpful, but could not be on site at all times. The cont ractor’s survey staff became proficient in the two systems; and needed GPS knowledge; capable , accurate, and reliable GPS equipment; as well as the ability to connect properly and effect ively with the rollers’ on-board software. The contractor can realize some advantages through the utilizati on of the rollers. Operators can adjust patterns and time based on real-time reactions/display, and the roller display can show and track coverage, passes, and comp action effort (measurement values) hopefully speeding production and assis ting with quality control. Weak areas can be visually identified on the roller’s real-time screen through installed software for rework. Through the use of the IC technology, by the co ntractor, the Departme nt can also realize some advantages. The rollers continuous covera ge records (vs. point tests at roughly 1000-ft. spacing) can speed construction with contractor’s use (appr opriate passes/energy). The technology promotes consistent and uniform paveme nt layers, which can be visually verified by the roller real-time screen.
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