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

Michael Henry, German Pardo, Tsugio Nishimura, Yoshitaka Kato

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトルAdvances in Concrete Structural Durability - Proceedings of the 2nd International Conference on Durability of Concrete Structures, ICDCS 2010
出版社Hokkaido University Press
ページ191-200
ページ数10
ISBN(印刷版)9784832903609
出版ステータスPublished - 2010
外部発表はい
イベント2nd International Conference on Durability of Concrete Structures, ICDCS 2010 - Sapporo, Japan
継続期間: 2010 11 242010 11 26

出版物シリーズ

名前Advances 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
国/地域Japan
CitySapporo
Period10/11/2410/11/26

ASJC Scopus subject areas

  • 土木構造工学
  • 海洋工学
  • 建築および建設

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