Poke vibrators

45 Atlas 150

Electric-powered Smart models have a radius of action 12 times the diameter of the poker heads rather than the standard 10, equipping them to work faster to remove air in fresh concrete. They are available with 1-7/8-in. and 2-3/16-in. poker heads. Their radii of action enables work in areas as large as 22 inches in diameter, which minimizes the number of dips. The pokers also operate with high centrifugal force and amplitude to provide as many as 12,000 vibrations per minute.

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Galvanized pipe, safety-wise proximity switch signal Skako Atlantis evolution

44 Skakoi 150

Skako Concrete continues North American market integration of its Danish parent company’s seven-model Atlantis planetary mixer (AM) line. Premiering at last month’s Precast Show in Orlando, the 4-yd. 3750 joins five smaller models currently available—the AM 750 to 3000—to be followed by the 5-yd. 4500 later this year.

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Voeller Mixers extends low-profile planetary line

43 Voelleri 150

The Precast Show 2015 saw Voeller Mixers unveil the latest addition to its Planetary Mixer series: a 3-yd. model powered by a single, 125-hp motor. It joins 1-, 4- and 5-yd. models, each designed with a) motors at the base of the vessel to eliminate headroom requirements and suit hard to fit batch plant conditions; and b) v-belt drive transmission, a signature component of the manufacturer’s Cyclo Mixer pan models.

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Concrete maturity monitor accelerates forming schedules, satisfies inspectors

42 ACRI 150

Concrete maturity can be determined by profiling temperature within the hardening. This benefits the project in both quality and speed of construction as adequate hydration can be determined and forms/shoring removed once target strength development is confirmed. The challenge is making sure that the temperature data is accurate and reliable, especially in the minds of engineers, quality control representatives and owner representatives who are responsible for finished slabs and structures.

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Shop drawing simplification boosts precast fabrication productivity

40 Drawing 600

Professionals throughout the construction value chain perennially confront the question: What are the obstacles to incorporating productivity-advancing processes and innovations the manufacturing industry has employed for years? A building is usually a one-of-one custom made product. A lack of repetitive building designs makes productivity gains in production of structural and architectural elements economically impractical if not impossible—adding time, increasing costs and compounding errors with each and every project.

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Precast ‘crushable’ concrete equal to security applications

34 table 600

“Crushable” concrete for better protection against terrorists … improved designs for precast rockfall barriers … corrosion of precast concrete barrier connections … lightweight, high-performance, self-consolidating concrete for bulb-T beams. They’re all part of new research presented earlier this year during the 94th annual Transportation Research Board annual meeting, which drew 12,000-plus design, engineering and allied professionals to Washington, D.C.

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