Grading Indexes of Recycled Coarse Aggregate

Content of attached old mortar, apparent density, water absorption ratio and crushing value are key factors governing the behavior of recycled coarse aggregate (RCA). Relation between water absorption ratio and old mortar content attached to the virgin aggregate part of RCA was investigated. An equation to describe relation of water absorption ratio and old mortar content was then put forward and compared with that in references. Relation between apparent density and water absorption ratio of RCA was investigated. The result indicates that water absorption ratio correlates linearly and negatively with apparent density when the apparent density is lower than 2500 kg/m3. Correlation between water absorption ratio and crushing value was also analyzed. In addition, grading indexes of RCA including apparent density, variation coefficient of apparent density, crushing value, old mortar content, Los Angeles loss and water absorption ratio were determined and specified. Three levels of RCA were recommended for different situations.

• Record URL:
  • https://doi.org/10.1061/47624(403)5
• Record URL:
  • http://ascelibrary.org/doi/abs/10.1061/47624%28403%295
• Availability:
  • Find a library where document is available. Order URL: http://ascelibrary.org/doi/book/10.1061/9780784476246
• Supplemental Notes:
  • Copyright © 2011 ASCE
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Li, Jiusu
• Conference:
  • GeoHunan International Conference 2011
  • Location: Hunan , China
  • Date: 2011-6-9 to 2011-6-11
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: References;
• Pagination: pp 33-39
• Monograph Title: Road Pavement and Material Characterization, Modeling, and Maintenance

Subject/Index Terms

• TRT Terms: Absorption; Aggregate gradation; Coarse aggregates; Crushing; Mechanical properties; Recycled materials
• Uncontrolled Terms: Water absorption
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I36: Aggregates;

Filing Info

• Accession Number: 01347776
• Record Type: Publication
• ISBN: 9780784476246
• Files: TRIS, ASCE
• Created Date: Aug 8 2011 2:20PM