ROLE OF CHEMICAL AND MINERAL ADMIXTURES ON PHYSICAL PROPERTIES AND FROST-RESISTANCE OF RECYCLED AGGREGATE CONCRETE

Recycling demolished concrete as an alternative source of coarse aggregates for the production of new concrete can help solve the growing waste disposal crisis and the problem of depleted natural aggregates. However, to make such recycling feasible, the strength and durability of the recycled aggregate concrete (RAC) must be assured. Even though much is known about the mechanical properties of recycled aggregate concrete, an important question remains about its freeze-thaw durability, and it appears that widespread utilization of such concrete will be limited until this question is addressed. This study was an attempt to investigate and compare how the frost resistance of the RAC and natural aggregate concrete (NAC) is affected by using mineral and chemical admixtures in their production. From the strength point of view, the recycled aggregate compared well with the natural aggregate in all cases, and therefore, could be considered for various potential applications. From the frost resistance point of view, the recycled aggregate had negative effects on durability performance. However, with the use of chemical admixtures, particularly air entrainment, the RAC was found to be as durable as the NAC.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Salem, R M
  • BURDETTE, E G
• Publication Date: 1998-9

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 558-563
• Serial:
  • ACI Materials Journal
  • Volume: 95
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Air entrainment; Coarse aggregates; Concrete; Concrete aggregates; Durability; Freeze thaw durability; Frost susceptibility; Natural aggregates; Pavements; Recycled materials; Recycling; Strength of materials
• Old TRIS Terms: Aggregate characteristics; Recycled pavements
• Subject Areas: Geotechnology; Highways; Pavements; I36: Aggregates;

Filing Info

• Accession Number: 00757789
• Record Type: Publication
• Contract Numbers: 19472021, 2302, 2673
• Files: TRIS
• Created Date: Dec 27 1998 12:00AM