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Author : Yee Shian Liew
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (96 download)
Download or read book Evaluation of Bond Strength Between Hot Mix Asphalt Surfacing Layers written by Yee Shian Liew and published by . This book was released on 2013 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vrida Ingrid Velian
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (96 download)
Download or read book Evaluation of Bond Strength Between Hot Mix Asphalt and Stone Mastic Asphalt Surfacing Layer written by Vrida Ingrid Velian and published by . This book was released on 2013 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Scott Shuler
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (111 download)
Download or read book Evaluation of Tack Coat Bond Strength Tests written by Scott Shuler and published by . This book was released on 2018 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poor bonding between asphalt pavement overlays and the substrate pavement layer can greatly influence the long term performance of hot mix asphalt (HMA) in the form of premature cracking and fatigue. The primary method to achieve bonding between layers is by hot mix asphalt (HMA) in the form of premature cracking and fatigue. The primary method to achieve bonding between layers is by using an asphalt emulsion tack coat. Additionally, field staff is charged with determining whether an existing pavement, especially a milled surface, is clean enough prior to tack coat placement, to ensure an adequate bond.
Author : Sutanto Muslich
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (757 download)
Download or read book Assessment of Bond Between Asphalt Layers written by Sutanto Muslich and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavements are usually constructed in several layers and most of pavement design and evaluation techniques assume that adjacent asphalt layers are fully bonded together and no displacement is developed between them. However, full bonding is not always achieved and a number of pavement failures have been linked to poor bond condition Theoretical research showed that the distribution of stresses, strains and deflections within the pavement structure is highly influenced by the bond condition between the adjacent layers. Slippage at the interface between the binder course and the base could significantly reduce the life of the overall pavement structure. If slippage occurs within the interface between the surfacing and the binder course, the maximum horizontal tensile strain at the bottom of the surfacing becomes excessive and causing the rapid surfacing failure. This condition becomes worse when a significant horizontal load exists. This thesis is concerned with the assessment of bond between asphalt layers. The main objective of this thesis is to provide guidance for assessing bond between asphalt layers, in order to facilitate the construction of roads with more assurance of achieving the design requirements. Further modification to the modified Leutner test has been performed. An investigation regarding the torque bond test and the effect of trafficking on bond have also been undertaken. A bond database on the modified Leutner test has been developed. An analysis has been performed to estimate the achievable values of bond strengths on typical UK road constructions obtained from the bond database. The values were then compared to the results from an analytical analysis to predict the required bond strength at the interface and other standards in Germany and Switzerland to recommend specification limits of bond strength for UK roads.
Author : Seong Hwan Cho
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (942 download)
Download or read book Evaluation of Interfacial Stress Distribution and Bond Strength Between Asphalt Pavement Layers written by Seong Hwan Cho and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bimal Thapa
Publisher :
ISBN 13 :
Total Pages : 69 pages
Book Rating : 4.:/5 (19 download)
Download or read book Laboratory Evaluation of Interface Bond Strength Between Asphalt Layers written by Bimal Thapa and published by . This book was released on 2017 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: A typical flexible pavement structure used by the Ohio Department of Transportation (ODOT) consists of several layers, including the subgrade, aggregate base, asphalt concrete base, intermediate course, and surface course. A light application of an asphaltic material, referred to as tack coat, is commonly used between the asphalt layers to distribute the stresses between the layers. The objective of this study was to evaluate the interlayer bond strength resulting from the use of three tack coat materials (SS-1h, rubberized tack, and non-tracking tack) commonly used in Ohio. The interface bond strength of laboratory-prepared samples was measured using a specialized fixture developed by Pine Test Equipment, Inc. that allows loading the samples in shear until failure along the interface. This study investigated the effect of the specimen diameter (4-inch and 6-inch), tack coat application rate (0.04 gallon/yd2 and 0.1 gallon/yd2), testing temperature (20°C and 25°C), and loading rate (0.1 inch/min and 2 inch/min) on the interface bond strength. The rheological properties of the three tack coat materials were also evaluated in accordance with AASHTO T 59-09. The highest interface bond strength was observed for the non-tracking tack, followed by the SS-1h and the rubberized tack, which were found to have comparable bond strengths to laboratory samples prepared with no tack coat. The optimum tack coat application rate was found to be dependent on the tack coat material type and the testing conditions (i.e., testing temperature and loading rate). A decrease in the interface bond strength was observed for the rubberized tack with the increase in the tack coat application rate, while an increase in the interface bond strength was noticed for SS-1h and the non-tracking tack with the increase in the tack coat application rate. In general, comparable results were obtained using the 4-inch and the 6-inch samples. As expected, higher interface bond strength was observed at the lower testing temperature for all samples. In addition, a higher interface bond strength was obtained for all samples when using the faster loading rate of 2 inch/min.
Author : Munir D. Nazzal
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (14 download)
Download or read book Determining Bond Strength of Micro-surfacing Mixes written by Munir D. Nazzal and published by . This book was released on 2018 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes Phase 1 research work that was completed to document the current state-of-the-practice for using tack coat with micro-surfacing projects by state and provincial transportation agencies, summarize studies on the evaluation of bond strength between micro-surfacing mixes and existing pavement surface, and identify available tests that are used for measuring the interface bond strength to determine the most appropriate one to use in micro-surfacing applications. A national survey of transportation agencies was conducted to collect information from those agencies on using tack coat for micro-surfacing applications. The survey results indicated that there is no consensus among responding transportation agencies about the importance of using tack coat for micro-surfacing applications. Most agencies that use tack coat with micro-surfacing believe that it is critical for providing adequate bonding with the underlying surface, while the majority of the agencies that do not use tack coat believe that it is not needed, as adequate bonding can be provided by the emulsion in the micro-surfacing mix. However, some agencies that stopped using tack coat with micro-surfacing (such as Indiana DOT and Michigan DOT) have noted some debonding issues and decided or are considering adding a requirement for tack coat usage. The survey results also indicated that none of the responding agencies are performing field tests to evaluate the bonding strength of micro-surfacing mixes. The results of the literature review conducted in Phase 1 of this project indicated that achieving adequate bonding between the micro-surfacing mix and the existing pavement is important to ensure full load transfer between the micro-surfacing layer(s) and the existing pavement. In addition, some studies suggested that the agencies that do not require using tack coat with micro-surfacing assume that the consistency of the micro-surfacing mix permits it to be evenly spread over the pavement surface, forming an adequate bond to the surface. The literature review was used to identify several candidate tests for the evaluation of the bond strength of micro-surfacing mixes. Based on the results of Phase 1 it was recommended that the testing matrix for Phase 2 include the following variables: Existing surface conditions, micro-surfacing mix type, micro-surfacing mix residual binder content, tack coat application rate, and tack coat material type. It was also recommended that the variables be evaluated through a field-testing program. Furthermore, it was recommended to consider two types of field bond strength tests for Phase 2: pull-off and torque bonding tests.
Author : Chang Fung Lung
Publisher :
ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (96 download)
Download or read book Bond Strength Assessment Asphalt Pavement Surfacing Layers written by Chang Fung Lung and published by . This book was released on 2015 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sk Abu Talha
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)
Download or read book Laboratory and Field Characterization of Micro-surfacing Mix Bond Strength written by Sk Abu Talha and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Current practice related to the use of tack coat prior to application of microsurfacing varies across the states to states. Few states require the use of tack coat, assuming it will allow a proper bonding at the interface between the micro-surfacing layer and existing pavement. On the other hand, the majority of the states do not use tack coat. They believe is that the consistency of the micro-surfacing mix allows it to be spread uniformly, resulting in a proper bond at the interface. However, no research has been conducted to investigate the effectiveness of tack coat on interface bond strength between the micro-surfacing layer and the existing pavement. The objective of this study was twofold. First, a laboratory test scheme was developed to characterize the bond strength between the micro-surfacing layer and the existing pavement hot mix asphalt (HMA) surface. In order to evaluate the effectiveness of tack coat, samples were prepared in the laboratory with varying tack coat application rate. Additionally, different percentages of residual binder content were also used to study the influence of residual binder content on bond strength characteristics. Two types of bonding strength tests were used including “Pull-off” and “Torque” bonding strength test. The pull-off test was carried out using two commercially available devices: 1- Proceq DY 206 and 2- Com-Ten pull off tester. A torque device was developed in the laboratory to carry out the torque tests. Secondly, a field-testing test program was4 established which include in-situ testing of the bond strength and laboratory testing of the cores collected from the field.
Author : Aiman Mustafa H. Mahmoud
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (958 download)
Download or read book Development of Technologies to Evaluate Hot Mix Asphalt Adhesion Through Tack Coat written by Aiman Mustafa H. Mahmoud and published by . This book was released on 2016 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible pavements consist of multilayers, which form the pavement structures. Since the strength of the bond at interface between layers plays a significant role in improving the structural integri-ty and the performance of pavement structures, tack coat materials and methods used for their application during construction are important in providing an adequate bond strength between pavement lifts. Tack coat is a bituminous liquid asphalt (a mixture of water, asphalt binder, and an emulsifying agent) and usually applied to provide a bond between pavement lifts. The absence of the tack coat adhesion at the interface between layers leads to increased stresses in the pave-ment structure. An inspection procedure to monitor the performance of the interlayer bond dur-ing the pavement use phase and identifying bond failures is critical to improve pavement man-agement systems and develop more effective pavement design strategies. In this study, two dif-ferent devices were developed at Oregon State University to evaluate the tack coat performance in the field. First, the wireless Oregon Field Tack Coat Tester (OFTCT) device was developed to predict the long-term performance of the in-situ tack coat bond strength and to evaluate the impact of pave-ment surface cleanliness before tack coat application on bond strength. Correlations between OFTCT field test results and the results of laboratory shear tests conducted with cores taken from the field were investigated to determine the effectiveness of the OFTCT tests. A new heat-ing system (an adjustable heat gun and environmental chamber) was developed to reduce the tack coat’s curing time in the field and control temperature during testing. The results indicated that the OFTCT device can be successfully utilized in the field to differentiate between clean and dusty surfaces before tack coat application. By using wireless sensors controlled by a laptop, practicality of the device was improved to reduce the testing time. The correlation between OFTCT and laboratory shear test results was determined to be statistically significant (R2 = 0.5189). OFTCT was able to identify the tack coats with high and low interlayer shear strength (ISS). Second, a new low cost field test device, Oregon Field Torque Tester (OFTT), was developed to evaluate the long-term post-construction tack coat performance of pavement sections. Correla-tions between OFTT field test results and the results of laboratory shear tests conducted with cores taken from the field were investigated to determine the effectiveness of the OFTT tests. The peak torque values at failure measured by the OFTT were observed to be highly correlated with the measured lab shear strengths. To conclude, both of the developed devices are expected to be adapted as field tests to evaluate the performance of tack coats in the field and to mitigate pavement distresses observed on roadways.
Author :
Publisher :
ISBN 13 :
Total Pages : 67 pages
Book Rating : 4.:/5 (913 download)
Download or read book Tack Coat Testing - Measuring Field Bond Strength written by and published by . This book was released on 2015 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes lessons learned in evaluating the bonding strength of hot mix asphalt (HMA) layers. Testing included: determining an optimal range for the bond strength of a tacked hot mix asphalt interface, and implementing the findings. The research method used a Florida Bond Test fixture along with a Marshall asphalt mixture testing load frame to evaluate tack bond shear strength and deformation. Specimens were obtained from state, county and city paving projects from around Minnesota. Results were compared to related research conducted in the United States. Recommendations for a tack bond test program: Equipment includes the Marshall load frame already used by many HMA laboratories, HMTS software or similar, and the Florida Bond Test apparatus. Follow Minnesota modifications of Florida Bond Test protocol. Compute the average and standard deviation of peak shear stress from specimen sets. Cores exhibiting layer separation during coring or during removal will be included in the specimen set and assigned a peak shear stress of 0 psi. Average peak shear stress will be 100 psi or greater. The standard deviation of peak shear stress will be 25 psi or less.
Author : Manfred N. Partl
Publisher : Springer Science & Business Media
ISBN 13 : 9400751036
Total Pages : 465 pages
Book Rating : 4.4/5 (7 download)
Download or read book Advances in Interlaboratory Testing and Evaluation of Bituminous Materials written by Manfred N. Partl and published by Springer Science & Business Media. This book was released on 2012-10-17 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: This STAR on asphalt materials presents the achievements of RILEM TC 206 ATB, acquired over many years of interlaboratory tests and international knowledge exchange. It covers experimental aspects of bituminous binder fatigue testing; the background on compaction methods and imaging techniques for characterizing asphalt mixtures including validation of a new imaging software; it focuses on experimental questions and analysis tools regarding mechanical wheel tracking tests, comparing results from different labs and using finite element techniques. Furthermore, long-term rutting prediction and evaluation for an Austrian road are discussed, followed by an extensive analysis and test program on interlayer bond testing of three different test sections which were specifically constructed for this purpose. Finally, the key issue of manufacturing reclaimed hot mix asphalt in the laboratory is studied and recommendations for laboratory ageing of bituminous mixtures are given.
Author : James A. Crovetti
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (891 download)
Download or read book Performance Evaluation of Tack Coat Materials written by James A. Crovetti and published by . This book was released on 2012 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Scarpas
Publisher : Springer Science & Business Media
ISBN 13 : 9400745664
Total Pages : 1340 pages
Book Rating : 4.4/5 (7 download)
Download or read book 7th RILEM International Conference on Cracking in Pavements written by A. Scarpas and published by Springer Science & Business Media. This book was released on 2012-08-30 with total page 1340 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the recent past, new materials, laboratory and in-situ testing methods and construction techniques have been introduced. In addition, modern computational techniques such as the finite element method enable the utilization of sophisticated constitutive models for realistic model-based predictions of the response of pavements. The 7th RILEM International Conference on Cracking of Pavements provided an international forum for the exchange of ideas, information and knowledge amongst experts involved in computational analysis, material production, experimental characterization, design and construction of pavements. All submitted contributions were subjected to an exhaustive refereed peer review procedure by the Scientific Committee, the Editors and a large group of international experts in the topic. On the basis of their recommendations, 129 contributions which best suited the goals and the objectives of the Conference were chosen for presentation and inclusion in the Proceedings. The strong message that emanates from the accepted contributions is that, by accounting for the idiosyncrasies of the response of pavement engineering materials, modern sophisticated constitutive models in combination with new experimental material characterization and construction techniques provide a powerful arsenal for understanding and designing against the mechanisms and the processes causing cracking and pavement response deterioration. As such they enable the adoption of truly "mechanistic" design methodologies. The papers represent the following topics: Laboratory evaluation of asphalt concrete cracking potential; Pavement cracking detection; Field investigation of pavement cracking; Pavement cracking modeling response, crack analysis and damage prediction; Performance of concrete pavements and white toppings; Fatigue cracking and damage characterization of asphalt concrete; Evaluation of the effectiveness of asphalt concrete modification; Crack growth parameters and mechanisms; Evaluation, quantification and modeling of asphalt healing properties; Reinforcement and interlayer systems for crack mitigation; Thermal and low temperature cracking of pavements; and Cracking propensity of WMA and recycled asphalts.
Author : A.F. Nikolaides
Publisher : CRC Press
ISBN 13 : 1040147089
Total Pages : 999 pages
Book Rating : 4.0/5 (41 download)
Download or read book Bituminous Mixtures and Pavements VIII written by A.F. Nikolaides and published by CRC Press. This book was released on 2024-06-21 with total page 999 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Sandra Erkens
Publisher : CRC Press
ISBN 13 : 1317285522
Total Pages : 212 pages
Book Rating : 4.3/5 (172 download)
Download or read book Functional Pavement Design written by Sandra Erkens and published by CRC Press. This book was released on 2016-10-14 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional Pavement Design is a collections of 186 papers from 27 different countries, which were presented at the 4th Chinese-European Workshops (CEW) on Functional Pavement Design (Delft, the Netherlands, 29 June-1 July 2016). The focus of the CEW series is on field tests, laboratory test methods and advanced analysis techniques, and cover analysis, material development and production, experimental characterization, design and construction of pavements. The main areas covered by the book include: - Flexible pavements - Pavement and bitumen - Pavement performance and LCCA - Pavement structures - Pavements and environment - Pavements and innovation - Rigid pavements - Safety - Traffic engineering Functional Pavement Design is for contributing to the establishment of a new generation of pavement design methodologies in which rational mechanics principles, advanced constitutive models and advanced material characterization techniques shall constitute the backbone of the design process. The book will be much of interest to professionals and academics in pavement engineering and related disciplines.
Author : A.F. Nikolaides
Publisher : CRC Press
ISBN 13 : 1351063251
Total Pages : 716 pages
Book Rating : 4.3/5 (51 download)
Download or read book Bituminous Mixtures and Pavements VII written by A.F. Nikolaides and published by CRC Press. This book was released on 2019-05-24 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highway engineers are facing the challenge not only to design and construct sustainable and safe pavements properly and economically. This implies a thorough understanding of materials behaviour, their appropriate use in the continuously changing environment, and implementation of constantly improved technologies and methodologies. Bituminous Mixtures and Pavements VII contains more than 100 contributions that were presented at the 7th International Conference ‘Bituminous Mixtures and Pavements’ (7ICONFBMP, Thessaloniki, Greece 12-14 June 2019). The papers cover a wide range of topics: - Bituminous binders - Aggregates, unbound layers and subgrade - Bituminous mixtures (Hot, Warm and Cold) - Pavements (Design, Construction, Maintenance, Sustainability, Energy and environment consideration) - Pavement management - Pavement recycling - Geosynthetics - Pavement assessment, surface characteristics and safety - Posters Bituminous Mixtures and Pavements VII reflects recent advances in highway materials technology and pavement engineering, and will be of interest to academics and professionals interested or involved in these areas.
