Durability and environmental impact of concrete combining various waste and recycled materials

Michael Henry, German Pardo, Tsugio Nishimura, Yoshitaka Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Utilization of waste and recycled materials in concrete is necessary to rcducc environmental impact but may have an adverse affect on mechanical properties. This paper investigated the effect of various combinations of fly ash, blast furnace slag, and low-grade recycled aggregates in concrete at three different water-binder ratios on mechanical and environmental performance. The balance between durability and environmental impact for a given strength level similar to normal-use concrete was also examined using analytic hierarchy process. Results showed that increasing the water-binder ratio and volume of recycled aggregate reduced compressive strength and increased air permeability and drying shrinkage. However, compared to normal-use concrete similar or better performance could be achieved, which was attributed to improvement of low-grade recycled aggregate performance when combined with fly ash. Similarly, CO2 emissions and volume of raw materials were lower than the normal-use concrete for all mixes. Concrete mixes with low air permeability and low CO2 footprint had the best balance of durability and environmental impact, as decreasing raw material volume tended to more greatly reduce durability.

Original languageEnglish
Title of host publicationAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010
PublisherHokkaido University Press
Pages191-200
Number of pages10
ISBN (Print)9784832903609
Publication statusPublished - 2010
Event2nd International Conference on Durability of Concrete Structures, ICDCS 2010 - Sapporo, Japan
Duration: 2010 Nov 242010 Nov 26

Publication series

NameAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010

Conference

Conference2nd International Conference on Durability of Concrete Structures, ICDCS 2010
CountryJapan
CitySapporo
Period10/11/2410/11/26

Keywords

  • Air permeability
  • Blast furnace slag
  • Environmental impact
  • Fly ash
  • Low-grade recycled aggregate
  • Shrinkage

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Building and Construction

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  • Cite this

    Henry, M., Pardo, G., Nishimura, T., & Kato, Y. (2010). Durability and environmental impact of concrete combining various waste and recycled materials. In Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010 (pp. 191-200). (Advances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010). Hokkaido University Press.