PERFORMANCE OF UNIFORMLY GRADED AGGREGATES IN BITUMINOUS CONCRETE

This paper reports a comparative study of the stability of uniformly graded (UG) and well graded (WG) aggregate mixes for bituminous concrete, and attempts to determine an equivalent pavement thickness for UG mixtures. The materials selected for the study were: (1) four types of UG; (2) one type of WG conforming to Indian Roads Congress (IRC) specifications; (3) well-graded sand; (4) fly ash as mineral filler; and (5) bitumen (80/100). The 'minimum voids' concept was used to proportion the mix. For each aggregate type, three samples were tested for an assumed bitumen content. The five mixtures could be classified into two groups: (1) having higher stability at higher bitumen content; and (2) lower stability at lower bitumen content. It was found that the performance of UG aggregates decreases appreciably with grain size. The equivalent thickness of a UG aggregate can be obtained from its grade, using a table. The use of UG aggregate for bituminous concrete, as illustrated here, ensures good quality control, because it involves only one type of aggregate.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1790571
• Corporate Authors:

  Indian Roads Congress

  Jamnagar House, Shahjahan Road
  New Delhi,   India  110 011
• Authors:
  • NARASIMHA, V I
  • SUNDARAJAN, T
• Publication Date: 1995-3

Language

• English

Media Info

• Features: References;
• Pagination: p. 23-7
• Serial:
  • Indian Highways
  • Volume: 23
  • Issue Number: 3
  • Publisher: Indian Roads Congress
  • ISSN: 0376-7256

Subject/Index Terms

• TRT Terms: Aggregates; Bitumen; Bituminous mixtures; Durability; Fly ash; Mechanical stability; Pavements; Quality assurance; Samples; Sand; Test procedures; Thickness
• ITRD Terms: 4577: Aggregate; 4963: Bitumen; 4967: Bituminous mixture; 5910: Durability; 4580: Fly ash; 2955: Pavement; 9123: Quality assurance; 6251: Sample (mater); 4105: Sand; 5930: Stability; 6288: Test method; 5933: Thickness
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00713422
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Nov 22 1995 12:00AM