A New Laboratory Evaluation Method For The Adhesive Performance Of Crack Sealants
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A New Laboratory Evaluation Method For The Adhesive Performance Of Crack Sealants
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Author : Xiaodi Hu
language : en
Publisher:
Release Date : 2011
A New Laboratory Evaluation Method For The Adhesive Performance Of Crack Sealants written by Xiaodi Hu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Adhesive performance categories.
Crack sealing is a practice used for routine and preventive maintenance as part of a pavement's preservation strategy. However, crack sealant failures are common in Texas, particularly within the first 3 years of application (or service life). The major causes of sealant failures can be classified under two categories: Adhesion failure and cohesion failure. Although both failures can lead to a significant reduction in the service life of a pavement structure, adhesive failure is in most cases the dominant failure type. Several laboratory tests such as rotational viscosity, penetration, softening point, ductility, and bond tests are currently used to evaluate the properties of crack sealants. Among these tests, the bond test is specifically used to evaluate the adhesive failure of crack sealants and the procedure of the bond test is well documented in ASTM D5329-07. However, the bond test often takes several days to complete, and the pass/fail criterion is determined through visual observation, which is a very subjective process. Furthermore, the correlation between the bond test and adhesive failure performance of crack sealants in the field was found to be either weak or non-existent. In an attempt to minimize these problems, a simple, fast, and adhesive performance-related laboratory test method is developed in this paper to ensure the proper selection of a sealant for a given project.
Field And Laboratory Evaluation Of Crack Sealants
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Author : Phillip G. Manke
language : en
Publisher:
Release Date : 1981
Field And Laboratory Evaluation Of Crack Sealants written by Phillip G. Manke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Pavements, Flexible categories.
Validation Of Hot Poured Crack Sealant Performance Based Guidelines
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2017
Validation Of Hot Poured Crack Sealant Performance Based Guidelines written by Imad L. Al-Qadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Pavements, Asphalt categories.
This report summarizes a comprehensive research effort to validate thresholds for performance-based guidelines and grading system for hot-poured asphalt crack sealants. A series of performance tests were established in earlier research and include the crack sealant bending beam rheometer (CSBBR), crack sealant direct tension test (CSDTT), the crack sealant adhesion test (CSAT), a rotational viscosity test, and a dynamic shear test. Validation was accomplished through an extensive field performance study incorporating a wide spectrum of commonly used sealants installed in eight test sites around the United States using two basic treatment methods: (1) clean and seal, and (2) rout and seal. Performance of these sealants and treatment methods were monitored for 3 years to quantify relative performance, primarily through adhesive and cohesive failures, as well as overband wear. Field samples were also collected from the sites to conduct laboratory testing to reflect in-service properties. A statistical method was used to develop correlations of the tests parameters with the field performance. The composite score approach, combining ranking and correlation, was used to develop a quantitative scale for determining the level of acceptance. Based on the composite score, a strong or acceptable correlation was obtained between field performance and laboratory test parameters. After the correlation between field performance and lab results was confirmed, the thresholds for test methods were selected or fine-tuned. An investigation was also conducted to evaluate the short-term and long-term aging effects of hot-poured crack sealants through a differential aging test. Rheological and mechanical properties of sealants at different aging stages were monitored to characterize the aging effects. Laboratory aging of sealants was studied using three different aging methods: kettle aging, melter aging, and vacuum oven aging (VOA). The aging index was used to evaluate the effect of these aging methods. By a comparison of the stiffness master curves obtained from the CSBBR test for field-aged samples and laboratory-aged samples, VOA was validated as a reasonable aging method for simulating 2 to5 years of field aging. The research proposes new guidelines for full implementation as AASHTO specifications. In addition to validated and revised thresholds for existing protocols, the research proposed a modified adhesion test and a simplified test for tracking resistance. Close inspection of the installation techniques and early performance feedback also supported the development of guidelines for crack sealant installation and application.
Validation Of Hot Poured Crack Sealant Performance Based
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2017
Validation Of Hot Poured Crack Sealant Performance Based written by Imad L. Al-Qadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Pavements, Asphalt categories.
This report summarizes a comprehensive research effort to validate thresholds for performance-based guidelines and grading system for hot-poured asphalt crack sealants. A series of performance tests were established in earlier research and include the crack sealant bending beam rheometer (CSBBR), crack sealant direct tension test (CSDTT), the crack sealant adhesion test (CSAT), a rotational viscosity test, and a dynamic shear test. Validation was accomplished through an extensive field performance study incorporating a wide spectrum of commonly used sealants installed in eight test sites around the United States using two basic treatment methods: (1) clean and seal, and (2) rout and seal. Performance of these sealants and treatment methods were monitored for 3 years to quantify relative performance, primarily through adhesive and cohesive failures, as well as overband wear. Field samples were also collected from the sites to conduct laboratory testing to reflect in-service properties. A statistical method was used to develop correlations of the tests parameters with the field performance. The composite score approach, combining ranking and correlation, was used to develop a quantitative scale for determining the level of acceptance. Based on the composite score, a strong or acceptable correlation was obtained between field performance and laboratory test parameters. After the correlation between field performance and lab results was confirmed, the thresholds for test methods were selected or fine-tuned. An investigation was also conducted to evaluate the short-term and long-term aging effects of hot-poured crack sealants through a differential aging test. Rheological and mechanical properties of sealants at different aging stages were monitored to characterize the aging effects. Laboratory aging of sealants was studied using three different aging methods: kettle aging, melter aging, and vacuum oven aging (VOA). The aging index was used to evaluate the effect of these aging methods. By a comparison of the stiffness master curves obtained from the CSBBR test for field-aged samples and laboratory-aged samples, VOA was validated as a reasonable aging method for simulating 2 to5 years of field aging. The research proposes new guidelines for full implementation as AASHTO specifications. In addition to validated and revised thresholds for existing protocols, the research proposed a modified adhesion test and a simplified test for tracking resistance. Close inspection of the installation techniques and early performance feedback also supported the development of guidelines for crack sealant installation and application.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1989
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Water categories.
Technologies For Improving The Evaluation And Repair Of Concrete Bridge Decks
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Author :
language : en
Publisher:
Release Date : 1998
Technologies For Improving The Evaluation And Repair Of Concrete Bridge Decks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Bridges categories.
Accelerated Laboratory Evaluation Of Joint Sealants Under Cyclic Loads
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Author :
language : en
Publisher:
Release Date : 2005
Accelerated Laboratory Evaluation Of Joint Sealants Under Cyclic Loads written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The purpose of this research was to investigate and rank the performance of eight hot pour joint and crack sealant materials for applicability of use in Manitoba through a performance-based lab testing approach. The project involves laboratory testing of sealant materials to verify fundamental properties and performance simulation under cyclic loading. Sealants were tested using a repeated compressive and tensile fatigue test at +30 degrees C, 0 degrees C and -30 degrees C. For the covering abstract of this conference see ITRD number E211426.
Development Of The Crack Sealant Adhesion Test
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Author : Xiaodi Hu
language : en
Publisher:
Release Date : 2009
Development Of The Crack Sealant Adhesion Test written by Xiaodi Hu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Pavements categories.
Crack sealants are widely used in Texas to prevent water from entering into lower structural layers thereby extending pavement life. However, most current crack sealants have been reported to have a very short life mainly due to adhesive failures. Although adhesive failure is known to be the major failure mechanism very little attention has been paid to measuring this property in the laboratory. The main objective of this project was to develop a performance related adhesion test using TxDOTs Overlay Tester. In this report the crack sealant adhesion test protocol developed in year 1 of this study was finalized. The final test protocol includes a molding jig, a detailed sample preparation procedure, an adhesion test protocol, and criteria for interpreting the results. In this study 13 sealants (some of them have never been used in Texas) were evaluated following the proposed test protocol.
Laboratory Evaluation Of Sealant Materials And Crack Sealing Techniques For Flexible Pavements
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Author :
language : en
Publisher:
Release Date : 1994
Laboratory Evaluation Of Sealant Materials And Crack Sealing Techniques For Flexible Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
This paper presents the development of a laboratory testing procedure for the evaluation of flexible pavement crack routing and sealing techniques. The testing procedure simulates both sealant installation techniques and environmental and traffic conditions. An experimental program involving the affecting factors has been designed and is represented in the paper. For the covering abstract of this conference, see IRRD number 863140.
Efficient Transportation And Pavement Systems Characterization Mechanisms Simulation And Modeling
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Author : Imad L. Al-Qadi
language : en
Publisher: CRC Press
Release Date : 2008-11-01
Efficient Transportation And Pavement Systems Characterization Mechanisms Simulation And Modeling written by Imad L. Al-Qadi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-11-01 with Technology & Engineering categories.
Internationally, significant attention is given to transport sustainability including planning, design, construction, evaluation, safety and durability of the road system. The 4th International Gulf Conference on Roads: Efficient Transportation and Pavement Systems - Characterization, Mechanisms, Simulation, and Modeling, hosted by the University o