ENGINEERING PROPERTIES OF MANGANESE-TREATED ASPHALT MIXTURES

An experimental program was conducted to evaluate the engineering properties and moisture susceptibility characteristics of manganese-treated asphalt mixtures over a range of temperatures. The experimental program involved three aggregates, two asphalt sources, three grades of asphalt cement, three levels of manganese treatment, and two air void contents. Tests were conducted at 32 deg F, 75 deg F, 104 deg F, and 140 deg F. The mixtures were cured 28 days at 140 deg F; however, resilient moduli were measured at various times during the 28-day curing period. Test methods were the static and repeated-load indirect tensile test, Marshall stability test, and Hveem stability test. Properties evaluated were tensile strength, resilient modulus of elasticity, Marshall stability and flow, and Hveem stability. In addition, the ratios of dry and wet tensile strengths and moduli were evaluated with respect to moisture susceptibility. On the basis of the results and conditions of this test program, it appears that the temperature susceptibility of the treated asphalt cement was reduced. Thus softer grades of asphalt cement treated with the manganese additive produced a mixture with less stiffness and strength at 32 deg F, higher strengths and stiffnesses at 104 deg F, and higher stabilities at 140 deg F compared to the untreated control mixtures containing a more viscous grade of asphalt cement. This should reduce the tendency for cracking at low temperatures and improve or maintain stability at higher temperatures. Stiffness increased with time during the curing period but appeared to be approaching a constant value after 28 days. An analysis of tensile strength or resilient modulus indicated no significant improvement in moisture or stripping resistance.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1985/1034/1034-007.pdf
• Record URL:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Characteristics of Bituminous Paving Mixtures to Meet Structural Requirements. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Kennedy, Thomas W
  • Epps, Jon
• Publication Date: 1985

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 56-65
• Monograph Title: Asphalt materials, mixes, construction, and quality
• Serial:
  • Transportation Research Record
  • Issue Number: 1034
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Additives; Asphalt mixtures; Hveem test; Manganese; Marshall test; Modulus of elasticity; Moisture content; Pavement stripping; Properties of materials; Stiffness; Tensile strength
• Uncontrolled Terms: Susceptibility
• Old TRIS Terms: Marshall stability marshall stability & flow test flow
• Subject Areas: Construction; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00459232
• Record Type: Publication
• ISBN: 0309039509
• Files: TRIS, TRB
• Created Date: Oct 31 1986 12:00AM