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American Concrete Institute Announces Awards

Wednesday, November 7, 2018

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The American Concrete Institute recently announced the winners of the 2018 Excellence in Concrete Construction Awards, with the highest honor going to the Viaduct Over River Almonte in Garrovillas de Alconétar, Cáceres, Extremadura, Spain.

According to the ACI, this award is given annually to a project that demonstrates excellence in concrete innovation and technology. The Viaduct Over River Almonte stood out due to being the largest railway bridge in Spain, yet remaining delicate in appearance.

Viaduct Over River Almonte

The new high-speed rail line, currently under construction and slated to connect Madrid and the Extremadura, a western Spanish region that borders Portugal, will cross the River Almonte on a 3,270-foot-long long viaduct, a concrete arch bridge with a 1,264-foot-long main span.

The structure’s aerodynamic appearance can largely be attributed to a four-legged arch configuration; 11,603 psi high-performance concrete; an efficient building method, featuring temporary towers and stays; and an innovative monitoring system. The viaduct also lays claim to being the world’s largest concrete arch bridge for high-speed rail service. Designed to respond in an improved manner to the effects of crosswind, the viaduct itself was completed in 2016, with construction originally beginning in 2011. A bespoke barrier forces birds to fly upward and above the overhead mast line.

Images: American Concrete Institute

In mid-October, the American Concrete Institute announced the winners of the 2018 Excellence in Concrete Construction Awards, with the highest honor going to the Viaduct Over River Almonte in Garrovillas de Alconétar, Cáceres, Extremadura, Spain.

Construction work was managed by Adif, the Administration of Railway Infrastructure, a state-owned company that operates under the Ministry of Public Works and Transportation, according to Princeton.

Other Awards

In addition to the Infrastructure category, much of the other awards are commercial in nature, including Decorative Concrete, High-Rise Buildings, Mid-Rise Buildings, Low-Rise Buildings and Repair & Restoration.

In High-Rise, the first-place winner was the Reston Station OB1 Tower in Reston, Virginia. According to ACI, Reston Station features an exposed concrete frame, with the tower sloping outward from the base to a roof area of 300,000 square feet.

The exterior columns are all angled and form giant "X" shapes as they rise from the platform slab on the east and west façades. Columns with limb-like forms are visible on the north side of the structure—these included structural steel cores and were constructed using about 400 cubic yards of a 10,000 psi, self-consolidating concrete mixture.

Other exterior columns were constructed using a 10,000 psi mixture over the full height of the building. This mixture had normal consistency, so it was consolidated using internal and external vibrators to ensure a high-quality architectural concrete finish. Interior columns had a maximum concrete strength of 12,000 psi at the base, decreasing to 7,000 psi at the upper levels. Slab mixtures included high-early strength, 5,000 psi concrete, and 7,000 psi lightweight concrete.

In High-Rise, the first-place winner was the Reston Station OB1 Tower in Reston, Virginia. According to ACI, Reston Station features an exposed concrete frame, with the tower sloping outward from the base to a roof area of 300,000 square feet.

A full breakdown of the awards includes:

Decorative Concrete

  • 1st Place: Roofing of the Montpellier-South of France TGV Station in Montpellier, Herault, France.
  • 2nd Place: Water Garden in Santa Monica, California.

High-Rise Buildings

  • 1st Place: Reston Station OB1 Tower in Reston, Virginia.
  • 2nd Place: Nexus Shopping and Business in Setor Marista, Goiânia, GO, Brazil.

Infrastructure

  • 1st Place: Viaduct Over River Almonte in 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.
  • 2nd Place: Design & Build of South Marina Yacht Club at Lusail in Doha, Qatar.

Mid-Rise Buildings

  • 1st Place: 1200 Intrepid Avenue in Philadelphia, Pennsylvania.
  • 2nd Place: Royal Alberta Museum in Edmonton, Alberta, Canada.

Repair & Restoration

  • 1st Place: Provo City Center Temple in Provo, Utah.
  • 2nd Place: Ford Theaters Off Season Improvements Phase 2 & 3 in Hollywood, California.

In order to be eligible for winning an Excellence in Concrete Construction Award, projects need to be winners at a local ACI chapter level, and then submitted by that chapter, or chosen by one of the Institute’s international partners.

The vetting process involved an expert panel of judges assessing each project based on architectural and engineering merit, creativity, innovative construction techniques and use of materials, ingenuity, sustainability and resilience, and functionality.

The winners were announced during the Institute’s Concrete Convention & Exposition on Oct. 15, in Las Vegas. Further details about winning projects can be found at ACIExcellence.org. Entries for next year’s Excellence in Concrete Construction Awards are being accepted now through April 2, 2019.

   

Tagged categories: American Concrete Institute; Awards and honors; Bridges; concrete; Infrastructure; Rail

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