Performance of Gravel Aggregates in Superpave Mixes with 100/95 Angularity PDF Download
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Author: Thomas Bennert
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 286
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Book Description
Author: Thomas Bennert
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 286
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Book Description
Author: Christopher L. Ericson
Publisher:
ISBN:
Category : Gravel
Languages : en
Pages : 168
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Book Description
The current aggregate requirement for aggregate angularity that the NYSDOT requires for their Superpave Hot Mix Asphalt (HMA) is 100/98. With this requirement, many of the gravel quarries in New York State cannot meet that specification. As a result, quarries that are further away from the job site have to transport the aggregates which in turn increases the cost of construction. This paper investigates a multitude of test methods to determine whether the NYSDOT can further lower their Superpave aggregate angularity requirement. Also, this paper delves into "grade bumping."
Author: Brian D. Prowell
Publisher: Transportation Research Board
ISBN: 0309088259
Category : Technology & Engineering
Languages : en
Pages : 101
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Book Description
Author: Erich M. Purcell
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 98
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Book Description
With the recent introduction and acceptance of Superpave design criteria for hot mix asphalt, designers have had difficulty meeting the minimum voids in the mineral aggregate (VMA) requirements. VMA is affected by compactive effort, gradation, and aggregate angularity. This research focused on the effects of fine aggregate angularity on VMA and rutting. Two 12.5-mm Superpave gradations, one coarse and one fine, were developed using 100% crushed limestone. Once the baseline gradations were established, laboratory samples were produced with increasing natural sand percentages. The percentage of natural sand directly replaced the limestone on each sieve allowing the gradation to remain constant and the effect of fine aggregate angularity to be observed independent of gradation. The resultant VMA and fine aggregate angularity of each blend was compared. In an effort to meet Superpave criteria, designers in Kansas have been using chat sand, a flaky fine aggregate of almost pure silica that is a byproduct of lead and zinc mining, to boost VMA.
Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
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Author: Leonardo T. Souza
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 180
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Book Description
Author:
Publisher: Transportation Research Board
ISBN: 0309155649
Category : Asphalt concrete
Languages : en
Pages : 285
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Book Description
Author:
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 80
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Book Description
Author: Ronald J. Cominsky
Publisher: National Research Council
ISBN:
Category : Transportation
Languages : en
Pages : 140
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Book Description
This report summarizes the research devoted to three key aspects of the Superpave Level I mix design: volumetric mix design criteria for aggregates and mixes; compaction; and mix conditioning. The first chapter describes the Delphi group process that was used to select aggregate properties and specification values included in the Level I mix design procedure. Chapter 2 addresses the rationale for the selection of the gyratory compactor, its relations to field control, and validation. The final chapter summarizes the research associated with the development and validation of laboratory conditioning procedures for asphalt concrete mixes. It describes the procedures used to simulate both short- and long-term aging, as well as moisture sensitivity under repeated loading.
Author: Robert N. Jester
Publisher: ASTM International
ISBN: 080312418X
Category : Asphalt
Languages : en
Pages : 223
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Book Description
A major result of the research conducted under the Strategic Highway Research Program from 1987 to 1993 was the development of the Superpave (Superior Performing Asphalt Pavement) system for the comprehensive design of asphalt pavements. These 14 contributions describe the experience to date in the
