Recommendations for Minimizing Poor Quality Coarse Aggregate in Asphalt Pavements PDF Download
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Author: John Pat Harris
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 68
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Book Description
Author: John Pat Harris
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 68
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Book Description
Author: E. Tutumluer
Publisher:
ISBN: 9780309390453
Category : Aggregates (Building materials)
Languages : en
Pages : 92
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Book Description
Author: John P. Harris
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 128
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Book Description
The primary objective of this project was to examine the effects of poor quality coarse limestone aggregate on hotmix asphalt performance and to determine how much of the poor quality limestone can be used before adversely affecting performance. A Type C aggregate composed of a high quality limestone from one quarry was blended with soft and absorptive limestone aggregates from two other quarries in different proportions using a PG 64-22 asphalt binder. The individual aggregates were run through Los Angles abrasion, Micro-Deval, magnesium sulfate soundness, specific gravity, and absorption tests. Molded bituminous samples were tested with the Hamburg wheel tracker, dynamic modulus, and the overlay tester.
Author: Magdy Abdelrahman
Publisher:
ISBN:
Category : Aggregate
Languages : en
Pages : 14
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Book Description
The demand for pavement facilities that can handle increasing loads escalates the need for high quality aggregate material. While once plentiful, quality aggregate sources are starting to diminish. When aggregates are eliminated locally by resource depletion as well as land development that prohibits mining, the cost of construction can rise significantly. The cost of transporting quality aggregate materials from other places that comply with specifications can be very expensive. Coarse aggregate specifications for pavement mixtures for many states are outdated, with some sections dating back to around the 1930s. Specifications do not reflect the current level of knowledge concerning testing methodologies of desirable aggregate properties for pavement applications, especially at the local and low volume level. There is a need to evaluate the quality of aggregates based on the suitability of property-based testing requirements. A better understanding of testing requirements used to evaluate material properties can lead to a better utilization of local aggregate materials and reduce the reliance on diminishing high quality sources. This study investigates what property-based testing requirements have been established in current specifications as well as new areas of testing that need to be developed. A questionnaire of professionals defined a set of testing requirements for different pavement applications, which were then compared to the currently specified testing requirements. The results concluded that gaps exist in how professionals define quality aggregate compared to what current specifications define as quality aggregate. This creates the need for the inclusion of more property-based testing that could better characterize aggregates based on pavement performance. This type of characterization could open up the possibility of utilizing local materials that are normally rejected for lower volume applications.
Author: Ken Skorseth
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
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Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author:
Publisher: Transportation Research Board
ISBN: 0309155649
Category : Asphalt concrete
Languages : en
Pages : 285
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Book Description
Author: Prithvi S. Kandhal
Publisher: Transportation Research Board
ISBN: 9780309062596
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
Author: ASTM Committee D-4 on Road and Paving Materials
Publisher: ASTM International
ISBN: 0803120249
Category : Asphalt
Languages : en
Pages : 147
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Book Description
Author:
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 104
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Book Description
Author: United States. Federal Aviation Administration
Publisher:
ISBN:
Category : Airports
Languages : en
Pages : 196
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Book Description
