Concrete Products

JUN 2017

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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Page 40 of 51 June 2017 • 39 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. Fea- tures 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. An optional "weigher frame" section is integrated into the DWM mixer top cover and shipped as a single unit. It includes a cement weigh hopper, aggregate holding or weighing hopper, and galvanized water weigher. The configuration suits precast batch plant retro- fits or converting a ready mixed plant from transit or dry to central mixed. — Advanced Concrete Technologies, Inc., Greenland, N.H., 603/431-5661; INNOVATIONS EQUIPMENT & PRODUCTS Twin-shaft mixers 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 reha- bilitation of structures requiring a thicker grout layer. The protective liners are easily fabri- cated to the shape of the concrete structures on-site. They are mounted to the formwork quickly and safely by means of end profiles and tear-off profiles. After the concrete sets, the protective liner system is extrusion welded to provide a leak-proof solution. By using this installation method, liners and the formwork can be erected at the same time. Liners are available in a variety of resin (HDPE, PP, PVDF and ECTFE), thicknesses and sheet/roll dimensions. SureFit options include an anti-skid surface for floors, coex- truded signal layer for damage detection, and self-cleaning surface for reduced sedi- mentation in pipe inverts. — Agru America Inc., Georgetown, S.C., 800/373-2478; www. Protective liners lengthen pipe, structure service life

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