BENEFICIAL USE OF SULPUR IN SULPHYR-ASPHALT PAVEMENTS. VOLUME 1: EVALUATION OF SAND-ASPHALT-SULPHUR MIXTURES UNDER REPETITIVE LOADING CONDITIONS
In an attempt to evaluate selective sand-asphalt-sulphur (S-A-S) mixture designs under repetitive loading conditions and provide a source of technical information and recommended procedures in the use of asphalt and sulphur as binders, laboratory evaluation and theoretical analysis was carried out, and the literature, patent review and manuals (generated under Phase 1) were updated. Basic engineering properties associated with highway pavement construction of S-A-S composites were evaluated through a laboratory program of mixture design, specimen preparation and testing. A limited theoretical analysis was performed of the fatigue life of a S-A-S pavement compared to a conventional asphaltic concrete system. A literature and data bank was set up, and preliminary specifications, design, construction and quality control recommendations were prepared. S-A-S pavements made with poorly graded sands have been shown to be as good as or better than conventional asphaltic concrete. Processing should be accomplished at between 250 and 300 deg. F. No deterioration in properties was noted after 28 days of post-cure. Properties of 80.5:6:13.5 weight percent of S-A-S mixture gave good results. The design properties of a mix can be tailored to predetermined parameters. The study results also indicate that the thermal properties of S-A-S are compatible with conventional A/C. Preliminary eleastic-layer analysis indicated fatigue life at low-to-moderate rates of loading to be better than asphaltic concrete and relatively equal at high rates. Observations are also made with regard to the mean hydrogen sulphide concentratioins, the preparation of S-A-S, and the economics of the use of S-A-S.
- Sponsored by Bureau of Mines and the Sulphur Institute.
Arlington, TX United States 76011
- Gallaway, B M
- Saylak, D
- Publication Date: 1974-8
- Features: Appendices; Figures; References; Tables;
- Pagination: 71 p.
- TRT Terms: Accelerated tests; Asphalt concrete; Asphaltic sand; Economics; Evaluation; Fatigue (Mechanics); Hydrogen sulfide; Information systems; Laboratory studies; Mix design; Patents; Properties of materials; Quality control; Repeated loads; Reviews; Specifications; Sulfur; Theory
- Uncontrolled Terms: Fatigue life
- Old TRIS Terms: Data systems
- Subject Areas: Economics; Highways; Materials;
- Accession Number: 00097486
- Record Type: Publication
- Report/Paper Numbers: Final Rpt.
- Files: TRIS
- Created Date: Aug 13 1975 12:00AM