Investigation of Aggregate Shape Effects on Hot Mix Performance Using an Image Analysis Approach PDF Download
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Author: E. Tutumluer
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 262
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Book Description
Author: E. Tutumluer
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 262
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Book Description
Author: E. Tutumluer
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 262
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Book Description
Author: Brian D. Prowell
Publisher: Transportation Research Board
ISBN: 0309088259
Category : Technology & Engineering
Languages : en
Pages : 101
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Book Description
Author: T. Fletcher
Publisher:
ISBN:
Category : Aggregate
Languages : en
Pages : 8
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Book Description
Aggregate shape has a significant effect on the performance of asphalt mixes. Designing well-performing asphalt pavements requires developing methods to quantify rapidly and accurately the different aggregate shape properties, and most importantly, relate these properties to performance. Aggregate texture has been identified in several studies to be the shape property that has the most significant influence on asphalt mix performance. This study presents a new procedure for measuring aggregate texture using image analysis techniques. The main advantages of this new procedure are the ability to capture the different sizes of texture elements, to separate the true texture from the color variations on the aggregate surface, and to characterize both fine and coarse aggregates. The procedure is used to measure texture for a wide range of fine and coarse aggregates, and the results are compared with the laboratory performance of asphalt mixes. The analysis shows that the procedure yields detailed information on aggregate texture in a short time. The texture measurements have very good correlation with the resistance of asphalt mixes to permanent deformation measured in the laboratory using different wheel tracking devices.
Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
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Book Description
Author: J-S Chen
Publisher:
ISBN:
Category : Aggregate gradation
Languages : en
Pages : 7
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Book Description
This paper is aimed at quantifying coarse aggregate shape in an efficient manner and relating aggregate characteristics to mix properties. Digital image analysis was used to evaluate aggregate characteristics such as elongation, flatness, and other shape indices. The following particle shapes were selected for this study: cubical, rod, disk, and blade. Data showed that the morphological characteristics of coarse aggregate correlated well with the results of other indirect tests such as the particle index. Cubical particles possessed the best rutting resistance over the other shapes. Flaky and/or elongated aggregate in a mixture resulted in a lower resistance to shear deformation. The morphological characteristics of coarse aggregates found from image analysis were in good agreement with the engineering properties of hot-mix asphalt (HMA) mixtures. This paper presents a precise method to evaluate the aggregate characteristics in an HMA mix and demonstrates their effects on pavement performance.
Author:
Publisher:
ISBN:
Category : Road construction contracts
Languages : en
Pages : 34
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Book Description
Author: Chandrakant S. Desai
Publisher: CRC Press
ISBN: 1000966801
Category : Technology & Engineering
Languages : en
Pages : 459
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Book Description
Understanding the mechanical behavior of solids and contacts (interfaces and joints) is vital for the analysis, design, and maintenance of engineering systems. Materials may simultaneously experience the effects of many factors such as elastic, plastic, and creep strains; different loading (stress) paths; volume change under shear stress; and microcracking leading to fracture and failure, strain softening, or degradation. Typically, the available models account for only one factor at a time; however, the disturbed state concept (DSC) with the hierarchical single-surface (HISS) plasticity is a unified modeling approach that can allow for numerous factors simultaneously, and in an integrated manner. DSC/HISS Modeling Applications for Problems in Mechanics, Geomechanics, and Structural Mechanics provides readers with comprehensive information including the basic concepts and applications for the DSC/HISS modeling regarding a wide range of engineering materials and contacts. Uniformity in format and content of each chapter will make it easier for the reader to appreciate the potential of using the DSC/HISS modeling across various applications. Features: • Presents a new and simplified way to learn characterizations and behaviors of materials and contacts under various conditions • Offers modeling applicable to several different materials including geologic (clays, sands, rocks), modified geologic materials (structured soils, overconsolidated soils, expansive soils, loess, frozen soils, chemically treated soils), hydrate-bearing sediments, and more.
Author:
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 204
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Book Description
Author: Eyad Masad
Publisher: Transportation Research Board
ISBN: 0309098823
Category : Aggregates (Building materials)
Languages : en
Pages : 94
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Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 555: Test Methods for Characterizing Aggregate Shape, Texture, and Angularity examines a methodology for classifying aggregates based on the distribution of shape, texture, and angularity characteristics. The report also explores a test method that it is appropriate for use in central and field laboratories, which measures shape, texture, and angularity characteristics of aggregates used in hot-mix asphalt, hydraulic cement concrete, and unbound base and subbase layers of pavements. Appendixes for the report were published as NCHRP Web-Only Document 80"--Publisher's description.
