Permanent Deformation Characteristics Of Dense Graded Mixes Using Asphalt Pavement Analyzer
DOWNLOAD
Download Permanent Deformation Characteristics Of Dense Graded Mixes Using Asphalt Pavement Analyzer PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Permanent Deformation Characteristics Of Dense Graded Mixes Using Asphalt Pavement Analyzer book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Permanent Deformation Characteristics Of Dense Graded Mixes Using Asphalt Pavement Analyzer
DOWNLOAD
Author : Jesús A. Sandoval-Gil
language : en
Publisher:
Release Date : 2004
Permanent Deformation Characteristics Of Dense Graded Mixes Using Asphalt Pavement Analyzer written by Jesús A. Sandoval-Gil and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Asphalt categories.
The Asphalt Pavement Analyzer (APA) device was used to characterize the impact of various mix factors on the development of permanent deformation in dense-graded mixes given a standard compactive effort. Factors included two aggregate sizes, three VMA levels, two fines contents, three binder contents and four binder types. All specimens received the same compactive effort (100 gyrations) using the Superpave Gyratory Compactor (SGC). For some tests, testing temperatures followed the standard APA test protocol (64C) and for some others, the test temperature was set at the high temperature of standard performance asphalt binder grade (e.g. 70C for a PG 70-22 asphalt binder). Statistical results showed that increased binder content increased permanent deformation in the 19.0 mm dense graded mixes prepared with the PG 64-22 binder irrespective of the other mix parameters. These effects were not noted in the mixes prepared with PG 70-22 and PG 76-22 binders, when tested at 64C. However, the same effect was noted when mixes prepared with PG 70-22, PG 70-22 Modified and PG 76-22 binders were tested at the high temperature of standard performance asphalt binder grade. All mixes prepared with the stiffer binders showed very low permanent deformation when tested at the standard 64C regardless of the value of the other mix parameters. The statistical analysis of permanent deformation provides evidence that the mixes prepared with the PG 76-22 and PG 70-22 Modified binders perform better than mixes prepared with the PG 70-22 and the PG 64-22 binders. The effect of VMA on permanent deformation depends on the maximum aggregate size used, test temperature, binder type and the fines content. It was not possible to separate these interaction effects. The results of this study suggest that the APA is relatively insensitive to changes in mix properties within the range of variables studied, when using the standard APA test temperature (64C). However, the APA device is sensitive when the test temperature matches the high temperature of the standard performance binder grade (e.g. 70C for a PG 70-22 binder). Based on the results of this study, it appears that the APA can be used to indicate the rut resistance of a mixture. Although some of the mix factors have an interactive effect in the mixes, the APA has a potential to predict the relative rutting of the hot mix asphalt mixes even when polymer modified mixes are used, provided that testing is conducted at the appropriate test temperature.
Permanent Deformation Characteristics Of Oregon Mixes Using The Asphalt Pavement Analyzer
DOWNLOAD
Author : James Ray Lundy
language : en
Publisher:
Release Date : 2004
Permanent Deformation Characteristics Of Oregon Mixes Using The Asphalt Pavement Analyzer written by James Ray Lundy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Pavements, Asphalt categories.
Permanent Deformation Characteristics Of Oregon Mixes Using The Asphalt Pavement Analyzer
DOWNLOAD
Author : James Ray Lundy
language : en
Publisher:
Release Date : 2004
Permanent Deformation Characteristics Of Oregon Mixes Using The Asphalt Pavement Analyzer written by James Ray Lundy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Pavements, Asphalt categories.
Asphalt Concrete
DOWNLOAD
Author : Carl L. Monismith
language : en
Publisher: DIANE Publishing
Release Date : 1998-07
Asphalt Concrete written by Carl L. Monismith and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-07 with categories.
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.
Evaluation Of Permanent Deformation Characteristics Of Hot Mix Asphalt Mixtures Using Superpave Technology
DOWNLOAD
Author : William Marty McNamara
language : en
Publisher:
Release Date : 1999
Evaluation Of Permanent Deformation Characteristics Of Hot Mix Asphalt Mixtures Using Superpave Technology written by William Marty McNamara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Pavements, Asphalt concrete categories.
Influence Of Aggregate Gradation And Particle Shape Texture On Permanent Deformation Of Hot Mix Asphalt Pavements
DOWNLOAD
Author : Randolph C. Ahlrich
language : en
Publisher:
Release Date : 1995
Influence Of Aggregate Gradation And Particle Shape Texture On Permanent Deformation Of Hot Mix Asphalt Pavements written by Randolph C. Ahlrich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aggregates (Building materials) categories.
Permanent Deformation Properties Of Asphalt Concrete Mixtures
DOWNLOAD
Author : Rabbira Garba
language : en
Publisher:
Release Date : 2002
Permanent Deformation Properties Of Asphalt Concrete Mixtures written by Rabbira Garba and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Asphalt concrete categories.
Rutting is recognized to be the major distress mechanism in flexible pavements as a result of increase in tire pressures and axle loads. Rutting is caused by the accumulation of permanent deformation in all or some of the layers in the pavement structure. The accumulation of permanent deformation in the asphalt surfacing layer is now recognized to be the major component of rutting in flexible pavements. This is a consequence of increased tire pressures and axle loads, which subjects the asphalt surfacing layer nearest to the tire-pavement contact area to increased stresses. Thus the study of permanent deformation properties of asphalt mixtures has become the focus of research, which aim to mitigate or reduce rutting in flexible pavements. The research work reported in this thesis aims to contribute towards understanding of the material properties and factors affecting permanent deformation in asphalt mixtures, mechanisms of the permanent deformation, and methods of its prediction. The specific objectives of this research work include; review and evaluation of available models for permanent deformation of asphalt concrete mixtures, investigation of the effect of volumetric composition, loading and temperature conditions on the permanent deformation of asphalt concrete, and the identification and definition of simple measures of resistance to permanent deformation. To meet the objectives of the study a laboratory investigation is conducted on several asphalt concrete specimens with varying volumetric composition. Two testing procedures are adopted; the repeated load triaxial and triaxial creep and recovery tests. The tests were conducted at two temperature levels of 25 and 50oC under varying stress conditions. A review of literature on factors affecting permanent deformation and available models for prediction of the permanent deformation is also conducted. The literature review indicated that most of the research work done so far concentrated on evaluation of the effect on permanent deformation response of component material properties such as aggregate gradation, aggregate angularity and binder type (or grade). Most of the studies conducted on permanent deformation properties of asphalt mixtures were also found to be based on different testing procedures and methods of evaluation, which makes it difficult to compare them and draw firm conclusions. The literature also indicated that, as yet, there is no comprehensive model for deformation of asphalt concrete. Results of tests conducted in this study are analysed to investigate the effect of volumetric composition, particularly binder content and void content, and loading conditions on the permanent deformation response of the mixture. Both the binder content and void content are found to significantly influence the permanent deformation characteristics. The effect of loading conditions, i.e., the confining stress and the deviatoric stress, is also found to be significant. Throughout this study emphasis is placed on methods and parameters that are used to evaluate mixtures for their resistance to permanent deformation. The traditionally used parameters such as the slope and intercept of the power model are evaluated for their sensitivities to changes in volumetric composition. This evaluation is based on the premises that any measure of resistance to permanent deformation should be sensitive to changes in volumetric composition to be good enough. It is found that most of these parameters are not sensitive to changes in volumetric composition and therefore are not suitable for comparison of mixtures made from the same materials but with varying proportion of the components. Permanent deformation in asphalt concrete is caused by both densification and shear deformation. The mode of deformation in asphalt concrete pavements, for greater part of their service life, is considered to be the shear deformation. Therefore it is necessary to evaluate mixtures for their susceptibility to shear deformation. The shear deformation manifests itself in the form of large lateral deformation relative to axial deformation. It is found that one dimensional analysis, which does not take the lateral deformation into account may lead to misleading results regarding the resistance to permanent deformation of mixtures. Therefore parameters which include volumetric and lateral strain are proposed for use in evaluation of mixtures. Substantial effort is put into modelling the accumulation of permanent deformation under repeated loading. For this purpose two approaches were selected: the cyclic hardening model based on bounding surface plasticity concept and an elasto-viscoplastic model based on strain decomposition approach. The bounding surface plasticity approach is found to be a convenient method to model the accumulation of permanent deformation. It is demonstrated that deformations calculated using cyclic hardening model based on bounding surface plasticity fits the measured deformation quite well. The elasto-viscoplastic model, which is based on strain decomposition approach, provides a suitable method for analysis of creep and recovery test results. Deformations calculated using this model also fit the measured deformation quite well. Finally a new composite measure of resistance to permanent deformation is developed. The resistance index is based on strain decomposition approach and is simple to calculate. The index incorporates a parameter related to shear susceptibility of mixtures and is sensitive to changes in volumetric composition. It is believed that this index can be used to compare and select mixtures at mixture design stage. If its applicability to other materials is proved by further research, it can also be linked to performance related specifications, as a simple measure of performance with regard to rutting.
Correlating Permanent Deformation Characteristics Of Hot Mix Asphalt With Aggregate Geometric Irregularities
DOWNLOAD
Author : C-Y Kuo
language : en
Publisher:
Release Date : 2002
Correlating Permanent Deformation Characteristics Of Hot Mix Asphalt With Aggregate Geometric Irregularities written by C-Y Kuo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Hot mix asphalt categories.
Regression analyses were performed to study the correlation between the permanent deformation characteristics of hot mix asphalt (HMA) mixtures and their aggregate geometric irregularities. Permanent deformation of HMA mixtures was characterized by permanent strain, creep modulus, and slope of the creep curve from unconfined repeated load deformation tests. The fine aggregate angularity (FAA) test was used to characterize fine aggregates while coarse aggregates were characterized with either the particle index (PI) test, the modified National Aggregate Association flow test (modified NAA), or image analysis. Regression analyses indicate strong correlation between the permanent deformation characteristics of HMA mixtures and the aggregate geometric irregularities. Use of imaging indices for characterizing coarse aggregates gives better coefficients of determination than do other coarse aggregate characteristics such as PI and modified NAA. The imaging indices have major potential in evaluating aggregate geometric irregularities for engineering analysis.
Permanent Deformation Response Of Asphalt Aggregate Mixes
DOWNLOAD
Author : Christine W. Curtis
language : en
Publisher: National Research Council
Release Date : 1994
Permanent Deformation Response Of Asphalt Aggregate Mixes written by Christine W. Curtis and has been published by National Research Council this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.
This report describes the research conducted on permanent deformation of asphalt concrete mixes as part of the SHRP Asphalt Research Program. Divided into three sections the report addresses the following: the development of a series of accelerated performance tests to measure the permanent deformation response and a constitutive relationship to define it; validation of the binder properties included in the SHRP binder specification; and the use of the test methodology in an asphalt concrete mix design and analysis system.
Aggregate And Material Tests And Properties Related To Performance
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1996
Aggregate And Material Tests And Properties Related To Performance written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Transportation Research Record 1547 contains the following papers: Analysis of resilient modulus of dense- and open-graded aggregates; Influence of aggregate properties on performance of heavy-duty hot-mix asphalt pavements; Aggregate characteristics governing performance of seal coat highway overlays; Evaluation of laboratory procedures for aggregate polish test; Coarse aggregate effects on elastic moduli of concrete; Evaluation of frost resistance tests for carbonate aggregates; Testing methodology for resilient modulus of base materials; Evaluation of pavement bearing characteristics using Florida limerock bearing ratio test; Steady-state strength, relative density, and fines content relationship for sands; Influences on permanent deformation behavior of unbound granular materials; Effect of aging on freshly deposited or densified calcareous sands; Shakedown of subgrade soil under repeated loading; Lincoln Avenue reclaimed asphalt pavement base project; Use of shredded rubber in unbound granular flexible pavement layers.