Development Of Apparent Viscosity Test For Hot Poured Crack Sealants
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Development Of Apparent Viscosity Test For Hot Poured Crack Sealants
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Author :
language : en
Publisher:
Release Date : 2008
Development Of Apparent Viscosity Test For Hot Poured Crack Sealants 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 Pavements 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.
Development Of A Viscosity Specification For Hot Poured Bituminous Sealants
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2007
Development Of A Viscosity 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 2007 with Crack sealant categories.
Current crack sealant specifications focus on using simple empirical tests such as penetration, resilience, flow, and bonding to cement concrete briquettes (ASTM D 6690) [1] to measure the ability of the material to resist cohesive and adhesive failures. There is, however, no indication of the pertinence of these standard tests to predict the success of field installation and sealant performance. In an effort to bridge the gap between sealant fundamental properties and field performance, performance-based guidelines for the selection of hot-poured crack sealants are currently being developed. This paper proposes a new viscosity test procedure to help assess the propensity of sealants to wet the crack surface during installation. The proposed procedure calls for the use of a Brookfield rotational viscometer equipped with a modified spindle rod and an SC4-27 spindle at a speed of 60 r/min. Sealants are heated 20 min at the recommended installation temperature and the viscosity is measured after 30 s of spindle rotation in the hot sealant. These experimental conditions provide viscosities representative of sealant viscosity at shear rates during field application. The repeatability for within laboratory and between laboratories was found to be 5.4 and 17 %, respectively. This repeatability is comparable with the corresponding variability of the SuperPave viscosity test for asphalt binders.
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
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.
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.
Test Development And Material Characterization Of Hot Poured Crack Sealant At Low Temperature
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Author : Shih-Hsien Yang
language : en
Publisher: ProQuest
Release Date : 2009
Test Development And Material Characterization Of Hot Poured Crack Sealant At Low Temperature written by Shih-Hsien Yang and has been published by ProQuest this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Among these six performance parameters, stiffness at 240s of 25MPa, average creep rate of 0.31 mm/mm/s, and extendibility level at different temperatures were identified and proposed as selection criteria for crack sealant at low temperature. These parameters were used to assess several in-service crack sealants with known field performance. The results show that the proposed tests and performance parameters are highly correlated with sealant field performance when compared to current ASTM specification standards.
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.
Binder Characterization And Evaluation
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Author : David A. Anderson
language : en
Publisher: Strategic Highway Research Program (Shrp)
Release Date : 1994
Binder Characterization And Evaluation written by David A. Anderson and has been published by Strategic Highway Research Program (Shrp) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.