Properties of HPC with recycled aggregates

The utilization of recycled aggregates can minimize environmental impact and slow the huge consumption of natural resources used for concrete applications. However, recycled aggregates are not suitable for use in the production of High Performance Concrete (HPC) due to their relatively high absorption capacity, unstable properties and the weaker strength of recycled aggregates. Such inadequacies can be overcome through carefully examining the characteristics of recycled aggregates and then adopting proper mixture proportions. In this paper, recycled aggregates generated from demolished-construction wastes, were examined and the Densified Mixture Design Algorithm (DMDA) was applied in the design of HPC. Results show that HPC specimens containing recycled aggregates can be designed to have a slump of more than 180 mm and a slump-flow larger than 550 mm. However, HPC specimens with high amounts of recycled aggregates and cement added lose their high-flowing and self-consolidating characteristics after 1 h due to their greater water absorption. Local standards of durability were satisfied at the age of 91 days by concrete resistivity and chloride ion penetration.

• Availability:
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• Authors:
  • Tu, Tsung-Yueh
  • Chen, Yuen-Yuen
  • Hwang, Chao-Lung
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 943-50
• Serial:
  • Cement and Concrete Research
  • Volume: 36
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Admixtures; Concrete aggregates; Durability; Environmental impacts; High performance concrete; Recycled materials; Sustainable development; Workability
• Uncontrolled Terms: Concrete additives; Recycled-aggregate concrete
• Subject Areas: Environment; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01025055
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 2006 9:29AM