Concrete Products

NOV 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 43 of 63

42 • November 2017 FEATURE ENVIRONMENTAL AWARDS CENTRAL REGION FIRST PLACE CEMSTONE PRODUCTS CO. UMORE PARK PLANT • ROSEMOUNT, MINNESOTA Over the past decade, Cemstone Products has raised the bar on green- field plant development, most recently evidenced in this two-year old ready mixed operation. Located in the University of Minnesota Out- reach, Research, and Education (UMORE) Park ancillary use facility, it is screened by a large berm and a dense row of trees along the county highway. The plant itself is housed in a precast concrete enclosure, while exterior aggregate bins are below ground. Batching, wash out and rinse down areas are kept in a tight trian- gle, affording increased operational efficiency and easing conveyance of process water to a weir pit recycling system. Gray water is used to wash out truck drums and in batching of fresh concrete. Presently, 20 percent of all batching water at the UMORE Park Plant is recycled gray water. Cemstone officials aim to increase that figure to 25 percent; at current batching volume, that would equate to annual fresh-water savings of more than 1 million gallons. The plant recently adopted the Carbon Cure Technologies process. It imparts about one pound of recycled, liquid carbon dioxide per yard of ready mixed. The CO 2 effect on cement optimization lowers net carbon by 30-40 lbs./yd. The UMORE Park Plant, notes Cemstone, "is striving to exceed customer expectations while continuing to find and implement innovative, environmentally friendly practices such as water recycling and carbon footprint reduction." Robust vegetation comfortably shields UMORE Park Plant operations from the most visible elevation. Returned concrete is brought to an adjacent aggregates processing yard, where the material is recycled. The Carbon Cure technology op- timizes cement dosage in ready mixed concrete production. Environmental Manager Pat Bergin trains site staff on weir usage and proper stormwater inspection methods, along with taking readings from well and dust collector pressure meters. Cemstone Products is eyeing metric creation and tracking processes for EMS programs at UMORE Park and sister ready mixed operations in the Upper Midwest.

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