Concrete Products

FEB 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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64 • February 2017 www.concreteproducts.com A precast operator under fourth- and fifth-gen- eration management is on the ground floor of one of western Pennsylvania's largest construc- tion undertakings since World War II. Reaching beyond its signature drainage and utility struc- tures, plus Reinforced Earth-licensed products, Concrete Concepts Inc. (CCI) of McKees Rocks, Pa., secured a contract covering 2,065 lagging panels for site walls along the Ohio River. The west bank structures front the southern edge of a 400-acre, Beaver County, Pa., brownfield to be reclaimed over the next five years as a Shell Chemical Appalachia, LLC, petrochemical com- plex with ethane cracker. Two walls running in staggered 4- to 40-ft. heights and more than 2,000 ft. in length follow natural and new plant contours. Specifications underscore Shell Chemical's aesthetic, environ- mental and concrete performance objectives: CCI cast the 9-in. thick panels with integrally colored mixes, ensuring the finished wall har- monizes with its surroundings. That aspect is especially apparent from Vanport Township, directly across the river along the east bank, or approaching the site in the Interstate 376 bridge westbound lanes. Reinforced with epoxy-coated rebar, the panels range from 2- x 5-ft. to 4- x 8-ft.; those deeper than 2 feet have false joints to project a uniform 2-ft. joint across a 47,000-sq.-ft. face. Standard and sloping top panels are uniformly 8-ft. and 5-ft. wide and vary in height. Panels are either solid or bear small diameter weep holes or larger square block outs for wall drain- age and/or tieback connections. The precast schedule included 31 standard and 250-plus unique panel sizes. "It took a lot of coordinated effort between our engineering staff and the contractor to create the panel arrangement that incorporat- ed the different features of the wall, from the multiple rows of tiebacks, to the even 2-ft. joint spacing, to the sloping top contour of the wall, resulting in the amount of panel types we had," says CCI President David Bryan. A spring and summer 2016 casting window saw peak production days net 500 square feet of product. CCI developed a self-consolidating mix with Sika ViscoCrete polycarboxylate high range water reducers, eyeing a 28-in. spread. The pro- ducer tapped Shale Green pigment from the new Chromix Admixtures Naturescapes series. L.M. Scofield, which was acquired by the Swiss par- ent of Sika Corp. just as panel production began, FEATURE BY DON MARSH Building a Wall Concrete Concepts forms a natural mask for petrochemical complex Construction of the site walls along the west bank of the Ohio River proceeded in mid- 2016. CCI delivered the final panel load earlier this year. PLANT, SITE PHOTOS: Concrete Products

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