Author : Gerald A. Huber
Publisher : ASTM International
Page : 237 pages
File Size : 36,49 MB
Release : 1995
Category : Asphalt emulsion mixtures
ISBN : 0803120028
Thirteen papers presented at the conference on [title], held in Phoenix, Arizona, December, 1994, discuss the products of the strategic highway research program, the Superpave method of mix design, and test methods for fatigue cracking and permanent deformation. Lacks an index. Annotation c. by Book
Author : Chris A. Bell
Publisher : Strategic Highway Research Program (Shrp)
Page : 228 pages
File Size : 46,23 MB
Release : 1994
Category : Technology & Engineering
ISBN :
The hardening or stiffening associated with heating asphalt 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 has been dedicated to developing accelerated performance tests for aging asphalt mixtures. Two test procedures developed at the Oregon State University utilize oven aging at 135 deg C and 85 or 100 deg C to simulate short- and long-term field aging. This report presents the results of the field validation of these two procedures.
Author : C. A. Bell
Publisher : Strategic Highway Research Program (Shrp)
Page : 106 pages
File Size : 33,8 MB
Release : 1994
Category : Technology & Engineering
ISBN :
Two major effects dominate aging of asphalt-aggregate mixtures: 1) loss of volatile components and oxidation in the construction phase (short-term aging) and 2) progressive oxidation of the in-place mixture in the field (long-term aging). Aging results in hardening (stiffening) of a mixture, which alters its performance both positively and negatively. This report presents the results of a preliminary investigation to evaluate aging methods for asphalt-aggregate mixtures. Short-term methods included oven aging and extended mixing, while long-term methods included oven aging and oxygen enrichment. The effects of temperature and aging duration are presented. The effects of aging were determined using the diametral resilient modulus test. Recommendations for short- and long-term aging are provided.
Author :
Publisher :
Page : 370 pages
File Size : 25,64 MB
Release : 1989
Category : Highway research
ISBN :
Author : C. A. Bell
Publisher :
Page : 204 pages
File Size : 23,42 MB
Release : 1994-04-01
Category :
ISBN : 9780309057707
Author : Douglas M. Marshall
Publisher : CRC Press
Page : 1944 pages
File Size : 21,52 MB
Release : 2015-10-26
Category : Political Science
ISBN : 113802693X
The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.
Author : Claribel Alvarez
Publisher :
Page : 44 pages
File Size : 24,74 MB
Release : 1994
Category : Pavements, Asphalt concrete
ISBN :
Author : Carl L. Monismith
Publisher : DIANE Publishing
Page : 81 pages
File Size : 50,24 MB
Release : 1998-07
Category :
ISBN : 0788171488
Summarizes research results concerned with the behavior of asphalt-aggregate mixes for pavements. An objective of this project was the development of a series of accelerated performance tests for asphalt-aggregate mixes together with methods for analyzing asphalt-aggregate interactions which significantly affect performance. Methodologies to define the fatigue, permanent deformation, thermal cracking, water sensitivity, and aging characteristics are described and use of these procedures in mix design/analysis stems which permit performance predictions under a variety of environmental and traffic loading conditions is illustrated.
Author :
Publisher : Strategic Highway Research Program (Shrp)
Page : 260 pages
File Size : 28,48 MB
Release : 1994
Category : Technology & Engineering
ISBN :
A primary objective for the Strategic Highway Research Program (SHRP) A-003A contract was to extend and verify the results obtained by other SHRP contractors on the performance-related characteristics of asphalt binders in paving mixes. This report specifically addresses validation of the following: 1) binder properties proposed by the A-002A contractor to predict asphalt-aggregate mix performance in terms of fatigue, permanent deformation, and thermal cracking; and 2) conditioning procedures that produce binder properties representative of those in a pavement immediately after construction and after several years of service. While water sensitivity requirements are not included in the binder specification, validation efforts in the water-sensitivity area are also described. Materials used in the investigation included 8 to 16 asphalt binders and 2 to 4 aggregates obtained from the SHRP Materials Reference Library.
Author :
Publisher :
Page : 692 pages
File Size : 44,47 MB
Release : 1998
Category : Air travel
ISBN :
