Concrete Products

JUL 2019

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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94 • July 2019 www.concreteproducts.com TECHNICAL TALK BY JEFF WINKE Concrete paving is pretty complex and achiev- ing quality, long-lasting results requires skill, the right equipment, and advanced technol- ogy. At its root, pavement is an outdoor floor ... a hardscape surface covering that is driven or walked on. One of the major advantages of concrete pavements is they are typically stronger and more durable than other types of surfaces. They also can be grooved to provide a tough, skid-resistant surface. A notable disadvantage is that they typically can be more time-consuming to construct. Thus, concrete contractors have turned to technology for production-enhancing effi- ciencies and improved results. According to the American Concrete Pave- ment Association, the role of technology has been significant to the growth and evolution Topcon raises concrete paving bar through Millimeter GPS of concrete paving: "Since 1892—when the very first concrete pavement was placed in America—concrete pavement technology has been changing, continually evolving to meet current and future needs." As part of this more than a century of improvement, the machines and meth- ods have evolved. Today, technology has improved productivity and quality of results. "We're seeing progressive contrac- tors ... early adopters embracing technology today, and the others realizing they will have to follow or settle for not being com- petitive," says Topcon Positioning Systems' Brian Lingobardo, systems manager, 3D road construction. "We have the technology to provide contractors with millimeter paving accuracy, which is astounding." Slipform pavers have become indispens- able in concrete paving because of their efficiency in the highly-automated produc- tion of highway pavements, airstrips, and other large surface sites. The track-mounted multipurpose machines are monster-size mas- ters in the production of a countless range of poured, in-place profiles. Controlling their performance to ensure desired results is where machine control developers step in. RIGID PAVEMENT: A GAME OF MM Topcon Positioning Systems offers a 3D paving capability through its Millimeter GPS system. According to Topcon, the product is the world's first GPS-based millimeter accurate control for pavers. The system uses satellite positioning together with a zone laser reference. Mounted on the paver is a control box designed to send control to the hydraulics independently. The color, graphi- cal screen displays the machine position on the job, and the sensors being used to control the left and right side of the pan, as well as the current elevation and slope. The system has machine control position- ing-zone laser receivers with integrated GPS antenna mounted on the rear of the paver. Other components on the paver include the machine control GNSS receiver and slope sensors to control the front or "draft" of the paver. The Topcon Millimeter GPS paver system features a laser that transmits a unique signal and operates similar to a standard rotating laser. Unlike a standard rotating laser that only works in a flat plane, the Topcon LZ-T5 transmits a Lazer Zone signal that creates a measuring area 33 feet (10 meters) in height. Therefore, positioned anywhere within the GLF Construction attributes material savings and yield gains to the Millimeter GPS paver system, whose machine control sensor, the LZ-T5, computes precise vertical information.

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