DESIGN, CONTROL, AND INTERPRETATION OF TESTS FOR BITUMINOUS HOT MIX BLACK BASE MIXTURES

Research is reported which was made in an effort to discover a means of fabricating large "black base" specimens containing top size aggegate up to 1 - 3/4 inch, develop asphalt-voids ratio curves capable of establishing ranges of asphalt and voids contents applicable to both design and construction control in the field, formulate a type of strength test which is applicable to engineering interpretation and depict the advantages of asphalt over water as a stabilizing agent. The detrimental effects of moisture absorption upon strength and its relation to total percent voids examined, and it is concluded that mixtures containing less than 5 to 6 percent total voids will usually be unaffected by absorption of moisture. The pressure pycnometer was used in this investigation to obtain saturation in a minimum of time. A large, motorized gyratory press has been constructed with accessories for compacting large size specimens in one layer. Conclusions based on the study are presented.

• Corporate Authors:

  Texas State Department of Highways & Public Transportation

  P.O. Box 5051
  Austin, TX  United States  78763
• Authors:
  • McDowell, C
  • SMITH, A W
• Publication Date: 0

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 64 p.

Subject/Index Terms

• TRT Terms: Asphalt; Bitumen; Bituminous aggregates; Compactors; Control; Design; Hot mix asphalt; Instruments for measuring density; Materials tests; Moisture content; Stabilizers; Void ratios
• Uncontrolled Terms: Compaction equipment; Gyratory compactors; Pycnometers
• Old TRIS Terms: Bitumen tests
• Subject Areas: Design; Highways; Materials;

Filing Info

• Accession Number: 00096480
• Record Type: Publication
• Report/Paper Numbers: TP-8-71-E
• Files: TRIS, STATEDOT
• Created Date: Aug 13 1975 12:00AM