00933749

Component

https://doi.org/10.3141/1795-04

http://scholar.google.com...mark&publication_year=2002

Bituminous crack sealants were analyzed by viscometry, fluorescence microscopy, infrared spectroscopy, thermogravimetry, modulated differential scanning calorimetry, and low-temperature tensile testing. The results indicate that sealants are blends of bitumen, oil, copolymer, and filler. Upon blending, these components produce a three-phase system that consists of a polymer-modified bitumen (PMB) matrix, a filler, and a filler-PMB interface. Spectroscopy and microscopy indicate that the PMB phase is rich in styrene-butadiene copolymer, that the filler is recycled rubber, sometimes mixed with calcium carbonate, and that the interface depends on the filler and the oil content in the sealant. The physicochemical methods were used to predict the short- and medium-term performance of sealant mixtures. The short-term performance predicted from viscometry and microscopy correlated well with the 1-year field performance of the sealants. Sealants showed two glass transition temperatures (Tg's), and a reasonable correlation was also found between low Tg and medium-term performance in a wet-freeze climate. However, because Tg measurements do not account for stress relaxation and aging effects, correlation was not perfect.

This paper appears in Transportation Research Record No. 1795, Maintenance of Pavements and Structures.

English

p. 33-39

2002

Transportation Research Record

0309077222

Figures (7) ; References (21) ; Tables (3)

Calorimeters; Copolymers; Fillers (Materials); Infrared spectroscopy; Pavement cracking; Performance; Physicochemical properties; Polymer asphalt; Recycled materials; Sealing compounds; Styrene butadiene rubber; Tension tests; Thermogravimetric analysis

Fluorescence microscopy; Glass transition temperature; Viscometry

Geotechnology; Highways; Maintenance and Preservation; Materials; Pavements; I23: Properties of Road Surfaces; I35: Miscellaneous Materials; I61: Equipment and Maintenance Methods

TRIS, TRB, ATRI

Nov 15 2002 12:00AM

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• INTEGRATING PAVEMENT PRESERVATION INTO A LOCAL AGENCY PAVEMENT MANAGEMENT SYSTEM
• INTEGRATION OF AGENCY RULES WITH THE PRESERVATION OPTIMIZATION MODEL IN THE PONTIS BRIDGE MANAGEMENT SYSTEM
• KENTUCKY TRANSPORTATION CABINET MOVES ITS BRIDGE PAINTING INTO THE 21ST CENTURY
• PERFORMANCE OF LOUISIANA'S CHIP SEAL AND MICROSURFACING PROGRAM, 2002
• PHENOMENA AND CONDITIONS IN BRIDGE DECKS THAT CONFOUND GROUND-PENETRATING RADAR DATA ANALYSIS
• TEN-YEAR FIELD PERFORMANCE EVALUATION OF JOINT RESEALING PROJECT
• TESTING CALCIUM NITRITE CORROSION INHIBITOR IN CONCRETE