Permeability Equipment for Porous Friction Surfaces PDF Download
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Author: Daniel L. Standiford
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
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Book Description
Hydroplaning is the loss of traction between tire and pavement due to the presence of a layer of water. This loss of traction can result in loss of vehicle control. A porous friction surface (PFS) applied over an existing pavement permits the water to drain laterally and vertically away from the tire path, effectively lowering hydroplaning potential. Equipment used to measure pavement drainage (permeability) is discussed with respect to usage on porous friction surface. Background information on hydroplaning, flow theory, and PFS field performance as they are affected by permeability are also presented. Pavement permeability equipment is divided into two groups: static test devices and dynamic test devices. Static test devices measure pavement permeability up to the hydrodynamic pressure range. Dynamic test devices measure pavement permeability in the hydrodynamic pressure range. Two dynamic test devices and four static devices are considered for measuring PFS permeability. Permeability tests are recommended to measure PFS permeability for maintenance purposes and construction control. Dynamic devices cited in this report could possibly estimate hydroplaning potential; further research must be done to determine this. Permeability devices cannot be used to accurately estimate friction of a pavement surface, however, decreased permeability of a pavement infers a decrease in friction. A static test device, is recommended to measure PFS permeability.
Author: Daniel L. Standiford
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
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Book Description
Hydroplaning is the loss of traction between tire and pavement due to the presence of a layer of water. This loss of traction can result in loss of vehicle control. A porous friction surface (PFS) applied over an existing pavement permits the water to drain laterally and vertically away from the tire path, effectively lowering hydroplaning potential. Equipment used to measure pavement drainage (permeability) is discussed with respect to usage on porous friction surface. Background information on hydroplaning, flow theory, and PFS field performance as they are affected by permeability are also presented. Pavement permeability equipment is divided into two groups: static test devices and dynamic test devices. Static test devices measure pavement permeability up to the hydrodynamic pressure range. Dynamic test devices measure pavement permeability in the hydrodynamic pressure range. Two dynamic test devices and four static devices are considered for measuring PFS permeability. Permeability tests are recommended to measure PFS permeability for maintenance purposes and construction control. Dynamic devices cited in this report could possibly estimate hydroplaning potential; further research must be done to determine this. Permeability devices cannot be used to accurately estimate friction of a pavement surface, however, decreased permeability of a pavement infers a decrease in friction. A static test device, is recommended to measure PFS permeability.
Author: Thomas D. White
Publisher:
ISBN:
Category : Pavements, Bituminous
Languages : en
Pages : 126
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 284
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Book Description
Author: Thomas D. White
Publisher:
ISBN:
Category : Friction materials
Languages : en
Pages : 64
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Book Description
Author: Boris Faybishenko
Publisher: John Wiley & Sons
ISBN: 1118877209
Category : Science
Languages : en
Pages : 262
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Book Description
Despite of many years of studies, predicting fluid flow, heat, and chemical transport in fractured-porous media remains a challenge for scientists and engineers worldwide. This monograph is the third in a series on the dynamics of fluids and transport in fractured rock published by the American Geophysical Union (Geophysical Monograph Series, Vol. 162, 2005; and Geophysical Monograph, No. 122, 2000). This monograph is dedicated to the late Dr. Paul Witherspoon for his seminal influence on the development of ideas and methodologies and the birth of contemporary fractured rock hydrogeology, including such fundamental and applied problems as environmental remediation; exploitation of oil, gas, and geothermal resources; disposal of spent nuclear fuel; and geotechnical engineering. This monograph addresses fundamental and applied scientific questions and is intended to assist scientists and practitioners bridge gaps in the current scientific knowledge in the areas of theoretical fluids dynamics, field measurements, and experiments for different practical applications. Readers of this book will include researchers, engineers, and professionals within academia, Federal agencies, and industry, as well as graduate/undergraduate students involved in theoretical, experimental, and numerical modeling studies of fluid dynamics and reactive chemical transport in the unsaturated and saturated zones, including studies pertaining to petroleum and geothermal reservoirs, environmental management and remediation, mining, gas storage, and radioactive waste isolation in underground repositories. Volume highlights include discussions of the following: Fundamentals of using a complex systems approach to describe flow and transport in fractured-porous media. Methods of Field Measurements and Experiments Collective behavior and emergent properties of complex fractured rock systems Connection to the surrounding environment Multi-disciplinary research for different applications
Author: United States. Bureau of Reclamation
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 356
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1064
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Book Description
Author: United States. Naval Facilities Engineering Command
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 60
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Book Description
Author:
Publisher:
ISBN:
Category : Airports
Languages : en
Pages : 34
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Book Description
Author: Qiao Dong
Publisher: Springer Nature
ISBN: 9819913004
Category : Technology & Engineering
Languages : en
Pages : 305
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Book Description
This book aims to introduce the knowledge, tests, and designs of materials in civil engineering. The scope of this book includes the fundamental mechanical and physical properties of materials; properties, tests, and gradation designs of aggregates; production, composition, hydration, properties, and tests of lime and cement; composition, tests, and design of cement concrete; mechanisms, properties, and design of inorganic binder stabilized material; properties, tests, and grading of asphalt; composition, properties, tests, and designs of asphalt mixture; and properties, treatments, tests, and selections of steel. This book can be used as a textbook or a reference book for undergraduate students, graduate students, and professionals in the field of civil, pavement, bridge, geotechnical, and environmental engineering. In this book, many charts on the key properties are used to help explain the mechanisms of materials. Step-by-step examples are presented to help understand both the knowledge and practices of material design such as the aggregate gradation design, cement concrete design, asphalt grading, and asphalt mixture design. The tests, designs, and specifications of civil engineering materials in China are introduced in detail.
