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      THE ROLE OF HVFA CONCRETE IN THE SUSTAINABILITY OF THE URBAN BUILT ENVIRONMENT

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          Abstract

          Although fly-ash as a partial replacement for cement has been utilized for many years, its use has been almost exclusively used in low volume percentages such as 10% or 20% cement replacement. This paper looks at high volume percentage replacements from 40% to 70%. A mini-mix study revealed that 50% and 60% cement replacement percentages were the best candidates for full scale testing. The environmental benefits included a 25% reduction in smog, human health, and fossil fuel reduction compared to the same element built with 100% Portland cement mix. The economic benefits included a 15% capital cost reduction and a 20% life-cycle cost reduction when compared with a 100% Portland cement mix. Full scale testing included a complete mix design in addition to the construction of four concrete infrastructure products. The products built included an alley panel and curb and gutter sections in the City and county of Denver, a precast manhole and lid, and a twin tee prestressed girder. Although cement products are just one of many materials used in the construction of the built environment, its production has a large impact on the environment. Lowering the embodied energy of multiple types of construction materials will have a significant effect on sustainable urban development. Symbiotic recycling of waste material, such as fly ash in concrete, back into the built environment can help reduce materials on the input side and pollution on the output side of the bulk material flow of an urban city. 4

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          Most cited references 14

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          “New Materials and Technologies Available for Use in Industrial Infrastructure: An Overview, Prepared for the DOE, Office of Energy Efficiency and Renewable Energy, March 25, 2003.”

          (2003)
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            “TRACI: The Tool for the Reduction and Assessment of Chemical and Other Environmental Impacts

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              ”High-Performance, High-Volume Fly Ash Concrete: Materials, Mixture Proportioning, Properties, Construction Practice, and Case Histories.”

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1552-6100
                1943-4618
                1943-4618
                Fall 2006
                : 1
                : 4
                : 129-140
                Author notes

                1.PhD candidate, University of Colorado at Denver, 1200 Larimer Street, Denver, Colorado 80217, mark.reiner@ 123456ewb-usa.org (corresponding author).

                2.Associate Professor, University of Colorado at Denver, 1200 Larimer Street, Denver, Colorado 80217.

                3.Associate Professor, University of Colorado at Denver, 1200 Larimer Street, Denver, Colorado 80217.

                4.Reprinted from the Journal of Engineering for Sustainable Development: Energy, Environment, & Health, Summer 2006 V1 N1 ( www.collegepublishing.us/jesdhome.htm).

                Article
                jgb.1.4.129
                10.3992/jgb.1.4.129
                ©2006 by College Publishing. All rights reserved.

                Volumes 1-7 of JOGB are open access and do not require permission for use, though proper citation should be given. To view the licenses, visit https://creativecommons.org/licenses/by-nc/4.0/

                Page count
                Pages: 12
                Product
                Categories
                RESEARCH ARTICLES

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