Concrete Products

DEC 2018

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 42 of 83 December 2018 • 41 COVER STORY SUPERIOR CONCRETE DC A trench drain at the mixer truck entrance captures runoff from two-thirds of the site subject to process water flow or exposure. Wa- ter drains to a four-pit weir with 56,000-gal. storage capacity. The final pit feeds an automated truck wash station fronting the truck charging alley plus a batch water line. Three tanks totaling near- ly 40,000 gallons' capacity can store settled process water as weir levels dictate. Leftover concrete is ribboned on pavement adjacent to the weir; broken up after a day; and, hauled to the sister Dulles plant for crushing into RC-6 grade recycled aggregate. Superior Concrete dedicates one-quarter acre to a permit-driven bio-retention pond, scaled to capture stormwater runoff from one- third of the site. The facility is rich in water-filtering vegetation: 34 shrubs of three different varieties; 1,100-plus perennial and grass plantings of five different varieties; and, seven perimeter willow oak trees. Prior to storm sewer discharge, captured water passes the plants, mulch and a specialized bio media filtering layer placed a top a #57 stone and pea gravel bed. The South Capitol Street elevation includes the mixer truck entrance, directly forward the charging alley; admixture tanks housed in ship- ping containers; and, maintenance shop (note page 43). Admixture and fly ash tankers unload at the front of the site, the latter feeding the first of two auxiliary silos. A companion slag cement vessel (right) is in the rear of the plant at the alley entry. The Workhorse reversing drum mixer (center) in the Stephens Eagle plant offers space, speed and maintenance related benefits compared to a tilt drum model. PHOTOS: Concrete Products, Superior Concrete Materials

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