PROPERTIES OF CONCRETE MADE WITH CRUSHED CONCRETE AS COARSE AGGREGATE

Effects of using recycled concrete of different qualities as coarse aggregate upon the strength and deformation of concrete are reported. Tests on the aggregates showed that the recycled concrete aggregates have lower specific gravity and higher absorption capacity than the original crushed granite aggregate. The resistance to mechanical action such as impact, crushing and abrasion for the recycled concrete aggregates is also lower. The effects of using recycled concrete aggregates instead of natural aggregates in concrete are: reduction in compressive strength up to 25%; reduction in modulus of elasticity up to 30%; improvement in dumping capacity up to 30%; and higher amounts of drying shrinkage and creep. Available methods of predicting the modulus of elasticity on the basis of compressive strength for conventional concrete overestimate the modulus of elasticity for recycled-aggregate concrete. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • RAVINDRARAJAH, R S
  • Tam, C T
• Publication Date: 1985-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 29-38
• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Volume: 37
  • Issue Number: 130
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Absorption; Aggregates; Coarse aggregates; Compression; Concrete; Creep; Crushed aggregates; Crushing; Damping (Physics); Deformation; Density; Drying; Forecasting; Materials tests; Modulus of elasticity; Physical properties; Recycled materials; Recycling; Shrinkage; Strength of materials; Tests; Waste disposal; Wear
• Uncontrolled Terms: Aggregate testing; Concrete properties; Concrete strength
• Old TRIS Terms: Concrete creep; Concrete shrinkage
• ITRD Terms: 6758: Absorption; 4577: Aggregate; 4559: Coarse aggregate; 5532: Compression; 4755: Concrete; 4732: Creep (mater); 5176: Crushing; 5559: Damping; 5595: Deformation; 5908: Density; 5184: Drying; 5919: Modulus of elasticity; 4573: Recycling (mater); 4743: Shrinkage; 5544: Strength (mater); 6255: Test; 5293: Wear
• Subject Areas: Geotechnology; Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00396959
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 25 2004 2:39AM