EFFECTS OF SELECTED ASPHALTS AND ANTISTRIP ADDITIVES ON TENSILE STRENGTH OF LABORATORY-COMPACTED MARSHALL SPECIMENS--A MOISTURE SUSCEPTIBILITY STUDY

The results are presented of a two-and-a-half-year research effort to study the following: the major causes of stripping problems in South Carolina; the moisture susceptibility of selected asphalt cements and aggregates in typical South Carolina paving mixtures; the prevention of moisture induced stripping of asphaltic concrete; and the performance of selected sources of paving grade asphalt cements and antistrip additives in laboratory-compacted Marshall specimens tested in indirect tension. The details are described of the research investigations (field study, laboratory study) and the test results. The management of moisture susceptibility is discussed. For the South Carolina aggregates tested in this program (granitic and siliceous mixtures), antistrip additives are necessary to protect against loss of strength from moisture susceptibility. A procedure is described to get moisture into the mixture, which is rapid and can be used in laboratory and field determinations of moisture susceptibility. Also, a program (ACMODAS) is described which provides a good tool for predicting the consequences of moisture susceptibility measured from indirect tension tests and for projecting the reduction in pavement life and benefits. It is stated that the use of these two procedures for testing and analysis, together with good construction practice, should eliminate much of the moisture-induced damage in flexible pavements.

• Supplemental Notes:
  • Preprint of a paper prepared for presentation at the annual meeting of the Association of Asphalt Paving Technologists, February 17-19, 1986, in Clearwater, Florida.
• Corporate Authors:

  Clemson University

  College of Engineering
  Clemson, SC  United States  29631
• Authors:
  • Busching, H W
  • Amirkhanian, S N
  • Burati, J I
  • Alewine, J M
  • Fletcher, M O
• Publication Date: 1986

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Aggregates; Antistrip additives; Asphalt; Asphalt cement; Asphalt concrete; Computer programs; Flexible pavements; Moisture content; Pavements; Performance; Service life; Stripping (Pavements); Tensile strength; Tension
• Uncontrolled Terms: Causes; Moisture susceptibility
• Old TRIS Terms: Indirect tension; Marshall specimens; Pavement life
• Subject Areas: Design; Geotechnology; Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00458168
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1986 12:00AM