Development Of The Crack Sealant Adhesion Test
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Development Of A Crack Sealant Adhesion Test Csadt Specification For Hot Poured Bituminous Sealants
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2011
Development Of A Crack Sealant Adhesion Test Csadt Specification For Hot Poured Bituminous Sealants 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 2011 with Adhesion categories.
Current crack sealant specifications utilize a simple empirical bond test [ASTM D5329, "Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphaltic and Portland Cement Concrete Pavements"] to measure a sealant's ability to adhere to concrete briquettes. However, no correlation exists between the results of this standard test and a sealant's field performance. To bridge the gap between sealants' fundamental properties and field performance, performance-based guidelines for the selection of hot-poured crack sealants have been developed. This paper proposes a new test procedure to help assess the capability of sealants to adhere to the sides of cracks in pavement. The proposed crack sealant adhesion direct tensile (CSADT) test procedure calls for the use of a direct tensile tester with modifications to the end pieces and the specimen holder. Sealant is confined between two aluminum pieces, which will move apart at 0.05 mm/s until failure occurs. Failure load and the displacement at failure are recorded and then used to assess the sealant's adhesion capability. A crack created on one side of the assembly during specimen preparation determines the initial failure location and ensures that the failure occurs at the interface and not within the sealant. The specimen preparation is designed to simulate sealant installation, and experimental conditions have been developed to represent crack openings during pavement contraction in cold weather. The repeatability of the suggested procedure was acceptable with an average coefficient of variation of 10.9 %. No significant difference existed between two operators or between two test setups.
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.
Adhesion Mechanisms Of Bituminous Crack Sealant To Aggregate And Laboratory Test Development
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Author :
language : en
Publisher:
Release Date : 2008
Adhesion Mechanisms Of Bituminous Crack Sealant To Aggregate And Laboratory Test Development 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 categories.
Development Of Adhesive Test For Hot Poured Crack Sealants
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Author : Mohammed Sa Sawalha
language : en
Publisher:
Release Date : 2016
Development Of Adhesive Test For Hot Poured Crack Sealants written by Mohammed Sa Sawalha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Development Of Performance Based Guidelines For Selection Of Bituminous Based Hot Poured Pavement Crack Sealant
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2009
Development Of Performance Based Guidelines For Selection Of Bituminous Based Hot Poured Pavement Crack Sealant 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 2009 with Pavements categories.
This report summarizes research presented in separate technical reports, papers, and journal articles that collectively document the development of a systematic process to aid in the selection of appropriate bituminous hot-poured sealants for pavement cracks and joints. The following process elements are summarized herein: Apparent Viscosity Test for Hot-Poured Crack Sealants, Development of a Short-Term Aging Test and Low-Temperature Testing Bibliography, Sealant Flow and Deformation by Dynamic Shear Rheometry in Summer Temperatures, Characterization of Low Temperature Creep Properties of Crack Sealants Using Crack Sealant Bending Beam Rheometry, Characterization of Low Temperature Mechanical Properties of Crack Sealants Using Crack Sealant Direct Tension Test, and Development of Adhesion Tests for Crack Sealants at Low Temperature. This report brings the results of this cumulative research together to introduce a set of tests and performance parameters for sealant at installation and service temperatures; an aging procedure to simulate sealant weathering; and most important, a simplified chart with thresholds for all performance parameters for the straightforward selection of crack sealant.
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.
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.
Advances In Functional Pavements
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Author : Yuqing Zhang
language : en
Publisher: CRC Press
Release Date : 2023-11-15
Advances In Functional Pavements written by Yuqing Zhang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-15 with Technology & Engineering categories.
Advances in Functional Pavements is a collection of papers presented at the 7th Chinese-European Workshop (CEW) on Functional Pavement (Birmingham, UK, 2-4 July 2023). The focus of the CEW series is on field tests, laboratory test methods and advanced analysis techniques, and covers analysis, material development and production, experimental characterization, design and construction of pavements. The main areas covered by the book include: Green pavements for circular and low-carbon economy Intelligent pavements for future and smart cities Durable pavements for long-life infrastructures Safe pavements for user-friendly build environments Advances in Functional Pavements aims at 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, academics and practitioners in pavement engineering and related disciplines as it should assist them in providing improved road pavement infrastructure to their stakeholders.
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.
Development Of A New Accelerated Adhesion Test For Silicone Sealants
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Author : AP. Cerra
language : en
Publisher:
Release Date : 1995
Development Of A New Accelerated Adhesion Test For Silicone Sealants written by AP. Cerra and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Accelerated categories.
Existing accelerated laboratory adhesion tests for silicone sealants are shown to lack the discrimination necessary to assess relative adhesive behavior. A novel test protocol is offered that enables improved discrimination by more precisely quantifying the adhesive strength of the sealant/substrate system. The method is based on the simultaneous application of both mechanical and environmental stress, in order to promote adhesive failure at loads below the cohesive strength of the bulk sealant.