Mechanistic Evaluation Of The Effect Of Wma Additives On Wettability And Moisture Susceptibility Properties Of Asphalt Mixes
DOWNLOAD
Download Mechanistic Evaluation Of The Effect Of Wma Additives On Wettability And Moisture Susceptibility Properties Of Asphalt Mixes PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Mechanistic Evaluation Of The Effect Of Wma Additives On Wettability And Moisture Susceptibility Properties Of Asphalt Mixes 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
Mechanistic Evaluation Of The Effect Of Wma Additives On Wettability And Moisture Susceptibility Properties Of Asphalt Mixes
DOWNLOAD
Author : Rouzbeh Ghabchi
language : en
Publisher:
Release Date : 2013
Mechanistic Evaluation Of The Effect Of Wma Additives On Wettability And Moisture Susceptibility Properties Of Asphalt Mixes written by Rouzbeh Ghabchi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Mix design categories.
This study used a mechanistic framework (i.e., surface free energy) to evaluate the moisture susceptibility of warm mix asphalt (WMA) with three different WMA additives, namely, Sasobit, Advera, and Evotherm. The surface free energy (SFE) components of modified PG64-22 asphalt binder with different percentages of WMA additives and selected aggregates were measured in the laboratory. The wettability, the work of adhesion, the work of debonding, and energy ratios were estimated in order to assess the moisture-induced damage potential of combinations of modified asphalt binders and different aggregates. The results indicate that Sasobit and Advera are able to reduce the moisture susceptibility potential of the mixes, but their use is not recommended with highly acidic aggregates such as granite. Evotherm resulted in the highest increases in wettability, total surface free energy, and increased work of adhesion and a reduction in the work of debonding, resulting in a better possible aggregate coating with asphalt binder and lower moisture susceptibility with all types of tested aggregates relative to those of other WMA additives. Furthermore, tensile strength ratio (TSR) tests were conducted on Advera and Evotherm-modified and neat (unmodified) asphalt mixes, and the results were compared with those from the SFE test. It was found that the SFE approach is a better indicator of moisture susceptibility than the traditional TSR test. The findings of the present study would help the highway engineers and agencies to better understand the moisture damage potential of flexible pavements constructed with WMA technologies.
Solving Pavement And Construction Materials Problems With Innovative And Cutting Edge Technologies
DOWNLOAD
Author : Zahid Hossain
language : en
Publisher: Springer
Release Date : 2018-07-16
Solving Pavement And Construction Materials Problems With Innovative And Cutting Edge Technologies written by Zahid Hossain and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-16 with Science categories.
This book presents challenges in transportation engineering, recent developments and advancements in technologies, and design and construction using sustainable materials. The articles presented in this volume focus on fundamental investigations on various aspects of civil engineering materials and structures. The scope of this volume is the application of findings for solving problems in geotechnical, pavement, and transportation engineering using emerging techniques. Papers were selected from the 5th GeoChina International Conference 2018 on Civil Infrastructures Confronting Severe Weathers and Climate Changes Conference, held on July 23 to 25, 2018 in HangZhou, China.
Bituminous Mixtures And Pavements Viii
DOWNLOAD
Author : A.F. Nikolaides
language : en
Publisher: CRC Press
Release Date : 2024-06-21
Bituminous Mixtures And Pavements Viii written by A.F. Nikolaides and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-06-21 with Technology & Engineering categories.
Bituminous Mixtures and Pavements VIII contains 114 papers as presented at the 8th International Conference ‘Bituminous Mixtures and Pavements’ (8th ICONFBMP, 12-14 June 2024, Thessaloniki, Greece). The contributions reflect the research and practical experience of academics and practicing engineers from thirty-four (34) different countries, and cover a wide range of topics: Session I: Bitumen, Modified binders, Aggregates, and Subgrade Session II: Bituminous mixtures (Design, Construction, Testing, Performance) Session III: Pavements (Design, Construction, Maintenance, Sustainability, Energy and Environmental consideration) Session IV: Pavement management and Geosynthetics Session V: Pavement recycling Session VI: Pavement surface characteristics, Pavement performance monitoring, Safety Session VII: Biomaterials in pavement engineering Session VIII: Prediction models of pavement performance Bituminous Mixtures and Pavements VIII covers recent advances in highway materials technology and pavement engineering, and will be of interest to scientists and professionals involved or interested in these areas. The ICONFBMP-conferences have been organized every four years since 1992. This 8th conference was jointly organized by: Laboratory of Highway Engineering, Aristotle University of Thessaloniki, Greece; Built Environment Research Institute (BERI), University of Ulster, UK; University of Texas San Antonio (UTSA), USA; Laboratory for Advanced Construction Technology (LACT), Technological Institute of Iowa, USA; Technological University of Delft (TUDelft), The Netherlands, and University of Antwerp, (UA), Belgium.
Analytical Methods In Petroleum Upstream Applications
DOWNLOAD
Author : Cesar Ovalles
language : en
Publisher: CRC Press
Release Date : 2015-04-02
Analytical Methods In Petroleum Upstream Applications written by Cesar Ovalles and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-02 with Science categories.
Effective measurement of the composition and properties of petroleum is essential for its exploration, production, and refining; however, new technologies and methodologies are not adequately documented in much of the current literature. Analytical Methods in Petroleum Upstream Applications explores advances in the analytical methods and instrumentation that allow more accurate determination of the components, classes of compounds, properties, and features of petroleum and its fractions. Recognized experts explore a host of topics, including: A petroleum molecular composition continuity model as a context for other analytical measurements A modern modular sampling system for use in the lab or the process area to collect and control samples for subsequent analysis The importance of oil-in-water measurements and monitoring The chemical and physical properties of heavy oils, their fractions, and products from their upgrading Analytical measurements using gas chromatography and nuclear magnetic resonance (NMR) applications Asphaltene and heavy ends analysis Chemometrics and modeling approaches for understanding petroleum composition and properties to improve upstream, midstream, and downstream operations Due to the renaissance of gas and oil production in North America, interest has grown in analytical methods for a wide range of applications. The understanding provided in this text is designed to help chemists, geologists, and chemical and petroleum engineers make more accurate estimates of the crude value to specific refinery configurations, providing insight into optimum development and extraction schemes.
Impacts Of Wma Additives On Rutting Resistance And Moisture Susceptibility
DOWNLOAD
Author : Thomas Glueckert
language : en
Publisher:
Release Date : 2012
Impacts Of Wma Additives On Rutting Resistance And Moisture Susceptibility written by Thomas Glueckert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Pavements, Asphalt categories.
The implementation of warm-mix asphalt (WMA) is becoming more widespread in the United States of America with a growing number of contractors choosing to utilize various WMA technologies. WMA technologies were developed in order to reduce mixing and compaction temperatures of hot mix asphalt (HMA) without affecting the quality of the pavement. Research into the effects of WMA additives suggests that it may be more susceptible to rutting and moisture damage than traditional HMA pavements. The objective of this research is to evaluate the effects of a single WMA additive on resistance to rutting and moisture damage on lab mixed and field mixed pavements. This objective was completed by conducting extensive laboratory experiments to determine and assess the performance of both WMA and HMA mixtures produced using Iowa aggregates. The conclusions of this study are as follow: * Reduced mixing and compaction temperatures were achieved using the selected additive. * The selected WMA additive was successfully used and samples were taken during a local resurfacing project. * Moisture sensitivity of both field mixed WMA and field mixed HMA were comparable although both failed to meet Iowa DOT standards. * Dry Indirect Tensile Strength values of lab mixed WMA and HMA samples were nearly the same. * TSR values of lab mixed HMA surpassed those of lab mixed WMA although both failed to meet Iowa DOT standards. * The aged field mixed HMA successfully passed the Hamburg Wheel Tracker Test and provided the best creep and stripping values compared to all other field mixed specimens. * Lab mixed HMA using a PG 64-22 binder performed the best compared to all other lab mixed specimens although none of the lab mixed specimens successfully passed the Hamburg Wheel Tracker Test.
Evaluation Of Warm Mix Additives For Use In Modified Asphalt Mixtures
DOWNLOAD
Author : Corina Borroel Wong
language : en
Publisher:
Release Date : 2011
Evaluation Of Warm Mix Additives For Use In Modified Asphalt Mixtures written by Corina Borroel Wong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Thesis categories.
The intention of this research effort is to evaluate the use of warm mix additives with typical polymer-modified and terminal blend tire rubber asphalt mixtures from Nevada and California. The research effort is broken into three phases that are intended to evaluate the impacts of warm mix additives with typical polymer-modified and terminal blend tire rubber asphalt mixtures from Nevada and California: moisture damage, performance characteristics, and mechanistic analysis. In Phase I of this research effort, mixture resistance to moisture damage was evaluated using the indirect tensile test and the dynamic modulus at multiple freeze-thaw cycles. Laboratory testing was conducted to address the following: (1) the impact of warm mix additive and reduced production temperatures on the moisture damage resistance of asphalt mixtures, (2) the impact of residual aggregate moisture on the moisture damage resistance of WMA mixtures, (3) the impact of warm mix additives on the moisture damage resistance of anti-strip treated WMA mixtures, and (3) the impact of long-term aging on strength gain and the moisture damage resistance of WMA mixtures. A total of one aggregate source, four warm mix asphalt technologies (Advera, Sasobit, Revix and Foaming) and three asphalt binder types (neat, polymer-modified and terminal blend tire rubber modified asphalt binders) typically used in both Nevada and California are being evaluated in this study. This thesis will only summarize the test results and findings of the Phase I of the study for two warm-mix additives: Advera and Sasobit. The evaluation of the other two technologies (i.e. Revix and Foaming) as well as the Phase II testing are still in progress and have not been completed.
Dissertation Abstracts International
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Dissertations, Academic categories.
Evaluation Of Selected Warm Mix Asphalt Additives
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2010
Evaluation Of Selected Warm Mix Asphalt Additives written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Asphalt categories.
Warm mix asphalt (WMA) is an emerging technology that can allow asphalt to be produced and compacted at a significantly lower temperature. In the past, a number of researchers evaluated various WMA mixtures using select testing procedures in the laboratory. However, none of them evaluated all four major WMA products and compared them against both control HMA and WMA mixtures without an additive using a comprehensive set of testing protocols. This thesis presents a comprehensive evaluation result of four major WMA additives regarding their tensile strength, moisture sensitivity, dynamic modulus and flow number. The WMA specimens exhibited similar air voids as HMA specimens which indicate that WMA additives are effective in compacting asphalt mixtures at a lower temperature. The indirect tensile strengths and tensile strength ratio (TSR) values of all WMA specimens were lower than that of HMA specimens. This result indicates that WMA mixtures could be susceptible to moisture damage. The only WMA mixture with CECABSE RT® exhibited the higher dynamic modulus at 37.8°C than the control HMA mixture. All WMA specimens, except Advera WMA and CECABASE RT®, passed the requirement of 10,000 cycles of repeated loading. Particularly, the WMA mixture with granular Aspha-min® exhibited the lowest permanent deformation followed by the control HMA mixture. The nano-scale images of additives with asphalt were also taken to study the characterization and interaction of WMA additives with asphalt. A shape resembling bee was observed in all asphalt images which has been criticized by the researchers. However, bee structures were disappeared in those images of asphalt with CECABASE RT® additive. At nano-scale, height and phase angle of all additive were found greater than the asphalt which proves them highly viscous than the asphalt.
Isolated Or Coupled Oxidative Moisture And Freeze Thaw Effects On Warm Mix Asphalt
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2018
Isolated Or Coupled Oxidative Moisture And Freeze Thaw Effects On Warm Mix Asphalt written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
This thesis aims to contribute to the growing body of warm mix asphalt (WMA) research by evaluating the differences in behavioral properties of three WMA mixtures, representing the three warm mix technology (WMT) categories (foaming, chemical additives, and organic waxes), relative to a control hot mix asphalt (HMA) in a specific set of conditions which is not well documented in literature. These conditions are: plant produced mixtures with all virgin aggregates and binder (i.e. no recycled materials) and no additives other than the warm mix technology. These mixtures were evaluated at low, intermediate, and high testing temperatures before and after a set of conditioning protocols (CPs), which utilized varying levels of isolated and combined oxidative, moisture, and freeze-thaw damage. A key feature of this thesis is that damage induced by these CPs has been benchmarked relative to measured field aging effects through studies which evaluated the three WMA mixtures and one HMA mixture used to obtain the results presented here, along with additional mixtures not considered in this thesis.
Investigation Of Moisture Susceptibility Of Warm Mix Asphalt Wma Mixes Through Laboratory Mechanical Testing
DOWNLOAD
Author : Wenyi Gong
language : en
Publisher:
Release Date : 2011
Investigation Of Moisture Susceptibility Of Warm Mix Asphalt Wma Mixes Through Laboratory Mechanical Testing written by Wenyi Gong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Abstract: The presence of moisture can lead to serious damage in Hot Mix Asphalt mixes and failures of HMA pavements. This is of an even greater concern for Warm Mix Asphalt (WMA) due to the use of much lower production temperatures which may not be high enough to completely dry the aggregates. In this Maine DOT study, the use of fracture energy parameters was evaluated to determine the influence of incomplete drying of mixes on their mechanical properties. Fracture energy based parameters (ER: energy ratio; RER: ratio of energy ratio) were determined from the following indirect tensile testing on mixes with fully and partially dried aggregates, some of which were subjected to moisture conditioning: Resilient modulus (Mr), creep compliance, and indirect tensile strength (ITS) strength at 5°C. The results indicate that: i. resilient modulus, creep compliance, and indirect tensile strength were all affected by the presence of moisture in mixes; ii. the trend and degree of influence by moisture for the different mechanical parameters are different; iii. The moisture conditioning process has caused larger decreases in resilient modulus and ITS values than incomplete drying of aggregates; however, the same moisture conditioning process has caused much larger decreases in modulus and ITS in asphalt mixes prepared with incompletely dried aggregates than the counterparts prepared with fully dried aggregates; and iv. fracture energy-based parameters (ER and RER) appear to be more distinctive moisture effect/damage indicators than the other parameters.