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NEWS AMERICAS ESSROC, LEHIGH HANSON-BACKED at Iowa State University's Institute for Transporta- tion, the Essroc Italcementi Group, and Lehigh Hanson, recently began extensive research on the environmental benefits of using concrete made with a new cement product in the construction of highways. The cement used in the concrete is blended with photo-chemically-active tita- nium dioxide TEAM TESTS PHOTOCATALYTIC PAVEMENT The Missouri Department of Transporta- tion, in collaboration with the Federal High- way Administration, the National Concrete Pavement Technology Center a thinner top wearing-course of concrete containing cement blended with TX Active. The shoulder pavement element of this (TiO2) and is marketed under the trade names TX Active (Essroc, East) and TioCem (Lehigh Hanson, West); TiO2 is capable of reducing the environ- mental pollutants from vehicle exhausts. The research is intended to determine the benefits obtained from concrete paving materials made with cement blended with TX Active and to assess the overall impact of using this special concrete in highway construction projects. This research will occur in combination with an upcoming Missouri Department (MoDOT) of Transportation two-lift paving demonstration project on Highway 141 in the St. Louis urban area. Two innovative applications will be studied: a photocatalytic concrete main- line pavement, and a photocatalytic pervi- ous concrete shoulder pavement. The mainline pavement material will be applied using a two-lift paving strategy, which involves the placement of two wet- on-wet layers of concrete instead of a sin- gle, homogeneous layer. The lower, base-level layer is expected to be con- structed with less expensive materials (e.g., a low cementitious-material content base lift), which will then be overlaid with The Ohio Aggregates and Industrial Minerals Association recently awarded Cemex USA the 2011 Reclamation Achievement Award for the ongoing, successful reclama- tion of one of its partially active quarries in Fairborn. Min- ing at the site will be completed in 2012, and all reclamation efforts are scheduled for completion in 2014. Cemex received the same recognition in 2008 for the suc- cessful reclamation of its Beavercreek clay mine site in 4 research effort involves cement blended with TX Active. In this instance, the cement will be used in a pervious concrete appli- cation. Together, this set of mainline and shoulder paving materials are believed to represent one of the most technically ad- vanced and environmentally friendly con- crete pavement systems ever employed. The project is being constructed by St. Louis-based Fred Weber, Inc. After several weather delays, the first pour took place at the beginning of this week, consisting of mainline photocatalytic two-lift, measuring 24 ft. wide, 10 in. thick, and 1,500 ft. long. Scheduled for the first week of November, the second pour on the third lane with the same measurements. A week later, the schedule calls for a control section pour, measuring 36 ft. wide, 10 in. thick, and 1,500 ft. long. The third week of November is scheduled to see standard, 12-ft.-wide concrete shoulders put in place. Finally, pervious concrete control and pho- tocatalytic shoulders will be poured imme- diately following the standards shoulders. "The weather has really pushed con- struction back, and we will be fighting to get everything in yet this year," says John Kevern, Ph.D., LEED AP, assistant profes- sor of civil engineering, University of Mis- souri-Kansas City, and lead researcher, along with Dr. James Alleman of Iowa State. "The worst case is that we post- pone a few activities until first thing next spring and begin monitoring air and water impacts for one full year as soon as it's finished." CEMEX FAIRBORN QUARRY RECEIVES OHIO RECLAMATION AWARD Beavercreek, Ohio. "We are proud of our successful mine reclamation ef- forts in Fairborn and are honored to be recognized as an industry leader in nature conservation," said Karl Watson, Jr., president of Cemex USA. "This award is testament to our ongoing commitment to minimize our footprint and mitigate the impacts of our quarry operations in the com- munities in which we live, work, and operate." CEMENT AMERICAS • November/December 2011 • www.cementamericas.com