SKIP VERSUS CONTINUOUS GRADATIONS OF AGGREGATES FOR ASPHALT PAVING MIXTURES

The materials selected for this comparative study are described as continuously graded aggregates whereby a quantity of every size of stone from the largest to the smallest is present, and skip gradings consisting of a combination of several single sizes with certain particular sizes omitted. The dolerite aggregate selected for study is described as angular, non-absorbent and with a specific gravity of 2.68, crushing value of 15.0, impact value of 15.0 and Los Angeles abrasion value of 14.9. The filler had a specific gravity of 2.70, and an 80-100 pen grade of asphalt was used as the binder. The characteristics of the materials are presented and the test procedure adopted to prepare the Marshall specimens is described. Test results obtained for Marshall stability, flow, voids in the mineral aggregate, air voids and density values are analysed, and the relationships explained in a series of graphs. It was concluded that skip graded mixtures are capable of satisfying all the Marshall design criteria. (TRRL)

• 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:
  • Sahu, C S
  • RAO, S K
• Publication Date: 1978-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 20-30
• Serial:
  • Indian Highways
  • Volume: 6
  • Issue Number: 9
  • Publisher: Indian Roads Congress
  • ISSN: 0376-7256

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt mixtures; Binders; Bituminous mixtures; Continuously graded aggregates; Density; Dolerite; Gap graded aggregates; Marshall test; Mix design; Properties of materials; Specific gravity; Test procedures; Void ratios
• Uncontrolled Terms: Marshall mix design
• Old TRIS Terms: Continuous grading; Marshall stability marshall stability & flow test flow; Void
• ITRD Terms: 4577: Aggregate; 4967: Bituminous mixture; 4598: Continuously graded aggregate; 5908: Density; 4597: Gap graded aggregate; 6290: Marshall; 5938: Porosity; 5925: Properties; 6288: Test method
• Subject Areas: Geotechnology; Highways; Materials; I36: Aggregates;

Filing Info

• Accession Number: 00310078
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 22 1980 12:00AM