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Admixture helps Thomas Concrete ‘shrink’ emergency bridge work schedule

The Georgia Department of Transportation approved the use of Premier Construction Products Group’s PREVent-C, a shrinkage-reducing and crack control admixture, among accelerated construction techniques on the Interstate 85 over Piedmont Road Bridges contract. Completed ahead of schedule, the six-week emergency project stemmed from a late-March fire that doomed twin structures carrying upwards of 250,000 vehicles daily.

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Twin-shaft mixers

Wiggert DWM models suit ready mixed and precast concrete operations requiring high output of quality mixes. Equipped with counter rotating shafts, the powerful twin-shaft series delivers fast mixing action and rapid discharge; handles mix designs with coarse aggregates; and, is available in five sizes ranging from 2- to 6-yd. output. Features of the German-engineered mixer include wear-resistant Ni-Hard arms and shovels, replaceable Armor Plate wear liners, plus an oversized discharge gate. The latter shortens cycle time and is hydraulically actuated, with all critical components mounted externally to avoid exposure to the concrete mix.

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Bulk tanker disk fluidizer/aerator

Company specializes in fluidizers that promote dry powder discharge from bulk trailers; its unique aerators can be specified when ordering new equipment or retrofitted to existing applications with convenient kits. Silo or tanker fluidizers enable a uniform flow of most dry bulk materials through aeration and vibration. The tanker fluidizer disk distributes air along the trailer, freeing up product evenly and efficiently, while minimum back pressure ensures energy is directed within the container walls.

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Protective liners lengthen pipe, structure service life

Sure-Grip Liners extend the life of tanks, pipes and other structures by combining thermoplastics’ flexibility and chemical resistance with the strength of concrete, thereby providing long-term protection. The product suits new cast-in-place construction, rehabilitation projects, plus pipe, manholes and other precast elements. Liners with V-shaped 13-mm tall Ultra Grip anchors are designed for concrete structures subject to high groundwater backpressure; Sure-Grip with 19-mm tall anchors are geared to rehabilitation of structures requiring a thicker grout layer.

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6-in. concrete masonry unit wall flashing

Company has added a 6-in. size to its BlockFlash series of embeddable flashing solutions for managing moisture in exterior, single-wythe concrete masonry unit walls. BlockFlash uses patented flashing pans to collect moisture in the wall and channel it to the exterior through integrated weep spouts, which are gray in color to blend in with standard mortar. Drainage mesh placed in every block cell in the course immediately above the pans provides hundreds of clear pathways for water to flow around mortar droppings inside the cells and reach the pans.

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