A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Laboratory Aging of Asphalt-Aggregate Mixtures: Field Validation
The hardening or stiffening associated with heating asphalt has been researched since the first use of asphalt in the United States around 1900, but little research has been accomplished on asphalt-aggregate mixtures. This hardening is referred to as aging and occurs in two stages: short-term aging which occurs during mixture mixing and placement, and long-term aging which occurs throughout the life of the pavement. A portion of the Strategic Highway Research Program (SHRP) has been dedicated to developing Accelerated Performance Tests (APTs) for aging of asphalt-aggregate mixtures. Two test procedures developed at Oregon State University utilize oven aging at 135 deg. C and 85 deg. C or 100 deg. C (275 deg. and 185 deg. or 212 deg. F) to simulate short- and long-term field aging. This report presents the results of the field validation of these two procedures. The short-term procedure of 4 hours at 135 deg. C (275 deg. F) prior to compaction is adequate for the majority of the field mixtures evaluated and conservative for some mixtures. Long-term oven aging for 2 days at 85 deg. C (185 deg. F) or 1 day at 100 deg. C (212 deg. F) after compaction and in addition to the short-term treatment appears representative of young mixtures (0 to 3 years old), in the field. Long-term oven aging for 4 to 8 days at 85 deg. C (185 deg. F) or 2 to 4 days at 100 deg C (212 deg. F) appears representative of older (older than 3 years) mixtures in the field and conservative for some mixtures. (Copyright (c) 1994 National Academy of Sciences.)
Laboratory Aging of Asphalt-Aggregate Mixtures: Field Validation
The hardening or stiffening associated with heating asphalt has been researched since the first use of asphalt in the United States around 1900, but little research has been accomplished on asphalt-aggregate mixtures. This hardening is referred to as aging and occurs in two stages: short-term aging which occurs during mixture mixing and placement, and long-term aging which occurs throughout the life of the pavement. A portion of the Strategic Highway Research Program (SHRP) has been dedicated to developing Accelerated Performance Tests (APTs) for aging of asphalt-aggregate mixtures. Two test procedures developed at Oregon State University utilize oven aging at 135 deg. C and 85 deg. C or 100 deg. C (275 deg. and 185 deg. or 212 deg. F) to simulate short- and long-term field aging. This report presents the results of the field validation of these two procedures. The short-term procedure of 4 hours at 135 deg. C (275 deg. F) prior to compaction is adequate for the majority of the field mixtures evaluated and conservative for some mixtures. Long-term oven aging for 2 days at 85 deg. C (185 deg. F) or 1 day at 100 deg. C (212 deg. F) after compaction and in addition to the short-term treatment appears representative of young mixtures (0 to 3 years old), in the field. Long-term oven aging for 4 to 8 days at 85 deg. C (185 deg. F) or 2 to 4 days at 100 deg C (212 deg. F) appears representative of older (older than 3 years) mixtures in the field and conservative for some mixtures. (Copyright (c) 1994 National Academy of Sciences.)
Laboratory Aging of Asphalt-Aggregate Mixtures: Field Validation
C. A. Bell (author) / A. J. Wieder (author) / M. J. Fellin (author)
1994
222 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Highway Engineering , Materials Degradation & Fouling , Transportation & Traffic Planning , Transportation , Accelerated life tests , Aging(Materials) , Hot mix paving mixtures , Asphalt pavements , Highway maintenance , Bituminous concretes , Aggregates , Mechanical properties , Field tests , Road materials , Resilience , Pavement condition , Mathematical models
Laboratory aging of asphalt-aggregate mixtures : field validation /C.A. Bell; Marco J. Fellin
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