Better Roads

January 2014

Better Roads Digital Magazine

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RoadScience 6 January 2014 Better Roads IC workshops/IC equipment demos, Veda data management software, pilot project selection and IC-related technical documents. Phone and email support is available Monday through Friday from 8 a.m. to 5 p.m. CST. Call the IC Support Hotline at 512-659 1231 or email In addition to phone and email support, the IC TSSC also provides local assistance, workshops, equipment demos, and an online library of technical documents and other resources. For more information, visit TanGO with BOMAG BOMAG Americas Inc. will introduce technologically advanced oscillation technology at ConExpo-Con/Agg at booth No. 50675. Oscillation compacts asphalt or soil with a horizontal effort, without introducing vertical vibrations into adjoining structures or bridge decks. BOMAG's Tangential Oscillation, dubbed TanGO, will be shown on its new BW161ADO-4 tandem roller. BOMAG TanGO oscillation makes use of the physical laws of vibration generation to its best effect, the maker says. The careful coordination of exciter system to drum weight ratios is the basis for BOMAG's tangential oscillation. Target applications for this compaction technology are on bridge structures and for working in close proximity to buildings. Usage for intermediate and finish rolling are additional proven applications. With tangential oscillation always applied horizontally, it maintains continuous ground contact, and efficient compaction results are often able to be seen immediately after a few roller passes. The interaction of TanGO oscillation from the rear drum and traditional vibration power from the front Photo courtesy of BOMAG AMERICAS premature belt failure. Guide lugs keep the belt centered for maximum performance. Mobil-Trac undercarriage delivers traction on heavily tacked surfaces, and the large ground contact area minimizes base disturbance on soft materials. The operator always has full control for steering and the ability to push trucks. Cat Compaction Control is featured on new Cat soil compactors, tandem vibratory compactors and pneumatic rollers and is one element of a suite of intelligent compaction technologies. For soil compactors, the basic system provides compaction measurement using either Compaction Meter Value (CMV) or Machine Drive Power (MDP) technology, with the ability to boost the system with GPS mapping capability. For tandem vibratory rollers and pneumatic compactors, the system provides pass-count information and GPS mapping, enabling the operators to achieve more homogeneous and effective compaction by making sure the right number of passes is made. Features beyond pass-count information are available, including infrared sensors on the front and rear to continuously measure asphalt temperatures. The accumulated data may be stored for later analysis so processes can be examined, adjusted and archived. MDP, an exclusive technology, is available on new Cat B-Series soil compactors, and is unique in that it measures compaction with the vibe system on or off. MDP measures rolling resistance as an indication of soil stiffness. It measures closer to the depth that the machines are able to compact. It also measures closer to lift thickness. The measurements are less impacted by the dampening effect of cohesive soils, so it can be used on padfoot machines. Cat Compaction Control, whether using CMV or MDP measurement, can also use a Global Navigation Satellite System – such as GPS – to provide positioning information to map pass count, coverage and compaction measurement details. This data can be stored for review at a later time. Visit Caterpillar Inc. at its indoor booth No. 10915 in the North Hall and outdoor booth No. 1015 in the Gold Lot or at The Federal Highway Administration (FHWA) offers intelligent compaction (IC) advice. Along these lines, the FHWA now offers IC phone and e-mail support as part of its national effort to deploy IC throughout the US. The IC Technical Support Service Center (TSSC) will answer all IC-related questions, including those regarding specifications, BOMAG TanGO oscillation makes use of the physical laws of vibration generation to its best effect.

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