Farmington Hills, Michigan, USA (October 15, 2018)—The American Concrete Institute (ACI) announced the winners of the 2018 Excellence in Concrete Construction Awards, who were honored during the Institute’s Concrete Convention & Exposition, October 15, 2018, in Las Vegas, Nevada, United States of America. 

The highest honor was presented to Viaduct Over River Almonte in Garrovillas de Alconétar, Cáceres, Extremadura, Spain. This award is given annually to one project that demonstrates excellence in concrete innovation and technology and stands out above all other entries.

A new high-speed rail line is under construction between Madrid and the Extremadura, a western Spanish region bordering Portugal. The line will cross over the River Almonte on a 996-meter-long (3,270-foot-long) viaduct—a concrete arch bridge with a main span of 384 meters (1,260 feet). Designed to carry 350 kilometers per hour (218 miles per hour) rail traffic, the viaduct had to meet rigorous dynamic, serviceability and safety criteria; and it required complex, staged calculations based on nonlinear material and nonlinear geometry behaviors. Nevertheless, it is aerodynamic and slender, largely due to key design features, including a four-legged arch configuration; 80 Megapascal (11,603 pounds per square inch), high-performance concrete; an efficient erection method, with temporary towers and stays; and an innovative monitoring system.

The viaduct’s 384 meter (1,260 foot) main span makes it the largest railway bridge in Spain and the world’s largest concrete arch bridge for high-speed rail service. Its design combines structural efficiency, out-of-plane stability, aesthetics and improved response against cross wind effects. The design is also environmentally friendly, as the bridge comprises durable materials, has been designed for expedient maintenance, and will include a bespoke barrier that will force birds to soar upward and above the overhead mast line. The bridge arch comprises high-performance, self-consolidating concrete. The complex erection procedure required the development of singular construction devices. The bridge was constructed using a ground-breaking instrumentation and monitoring system that provides information regarding the behavior of the structure during construction and service.

The ACI Excellence in Concrete Construction Awards were created to honor the visions of the most creative projects in the concrete industry, while providing a platform to recognize concrete innovation, technology, and excellence across the globe. To be eligible for participation, projects needed to be winners at a local ACI chapter level and submitted by that chapter or chosen by one of ACI’s international partners. 

An independent panel of esteemed industry professionals judged projects and selected winners based on architectural and engineering merit, creativity, innovative construction techniques or solutions, innovative use of materials, ingenuity, sustainability, resilience, and functionality. Additional winning projects were selected from among several possible categories, and included:

Decorative Concrete

  • 1st Place: Roofing of the Montpellier-South of France TGV Stationin Montpellier, Herault, France 
  • 2nd Place: Water Gardenin Santa Monica, California, USA

High-Rise Buildings

  • 1st Place: Reston Station OB1 Towerin Reston, Virginia, USA
  • 2nd Place: Nexus Shopping and Businessin Setor Marista, Goiânia, Brazil

Infrastructure

  • 1st Place: Viaduct Over River Almontein Garrovillas de Alconétar, Cáceres, Extremadura, Spain
  • 2nd Place: Viroflay Underground Train Station– in Meudon, Hauts-de-Seine, France

Low-Rise Buildings

  • 1st Place: University of Iowa Visual Arts Building, in Iowa City, Iowa, USA
  • 2nd Place: Design & Build of South Marina Yacht Club at Lusail (BP15)in Doha, Qatar

Mid-Rise Buildings

  • 1st Place: 1200 Intrepid Avenuein Philadelphia, Pennsylvania, USA
  • 2nd Place:Royal Alberta Museumin Edmonton, Alberta, Canada

Repair & Restoration 

  • 1st Place: Provo City Center Templein Provo, Utah, USA
  • 2nd Place: Ford Theaters Off Season Improvements (phases 2 & 3) in Hollywood, California, USA

The winning project details can be found at ACIExcellence.org. Entries for the 2019 Excellence in Concrete Construction Awards are being accepted now through April 2, 2019. Visit concrete.org for more information.