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Performance Evaluation Of Chip Seals In Idaho
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Book Synopsis Performance Evaluation of Chip Seals in Idaho by : Manoochehr Zoghi
Download or read book Performance Evaluation of Chip Seals in Idaho written by Manoochehr Zoghi and published by . This book was released on 2009 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intent of this research project is to identify a wide variety of parameters that influence the performance of pavements treated via chip seals within the State of Idaho. Chip sealing is currently one of the most popular methods of maintenance for paved road surfaces. It entails spraying the pavement surface with asphalt (or "binder") and then immediately covering it with aggregate (or "chips") and using rollers to compress and settle the application. Chip sealing is used to seal non-structural cracks, increase surface friction, and improve ride quality. There are a variety of techniques and formulas ("design methods") for mixing the binder and aggregate used in chip sealing. In Idaho, these design methods lack uniformity: empirical methods are used, based on an informal rule-of-thumb, the experiences of the parties making the chip seal, and the materials that are readily available. This project compares the methods used in Idaho with several different design methods that have been developed in various parts of the world. The project's research focus is a series of laboratory experiments using different binders and aggregates obtained from all six Idaho Transportation Department districts. The results of these experiments have been compiled and analyzed, with the findings included herein. Chief among these findings, it was observed that the ratio of median size to flakiness index of the aggregate exhibits a better correlation with the percentage aggregate retained rather than the least dimension (as used in the commonly used McLeod Design Method). It was also found that the cleanness value of the aggregate is a critical factor for retaining aggregate--i.e., keeping the chips on the treated road surface, rather than breaking free from the binder. This report concludes with a series of seven recommendations for improving chip sealing practice in Idaho, and with a list of eight areas worthy of additional research.
Book Synopsis Design and Evaluation of Chip Seals Through Image-based Microstructural Parameters and Performance Tests by : Yogesh Shamsunder Kumbargeri
Download or read book Design and Evaluation of Chip Seals Through Image-based Microstructural Parameters and Performance Tests written by Yogesh Shamsunder Kumbargeri and published by . This book was released on 2019 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip seal is one of the most popularly adopted pavement preservation strategies. A chip seal treatment is constructed by adding hot asphalt or emulsion on the surface of an existing pavement, spraying aggregates on the top, followed by roller compaction. Extensive research has led to the formulation of various chip seal analysis and design methodologies. These methods are mostly empirical in nature and depend on numerous assumptions related to chip seal microstructure and their expected behavior after compaction in field. Hence, there is a need for in-depth analysis of chip seals to develop performance-based design methods addressing the primary distresses as well as the microstructural parameters such as percent embedment and aggregate orientation. The objective of this research study was to evaluate chip seals through image-based microstructural parameters and performance tests. The results of a comprehensive experimental program lead to development of a holistic approach to chip seal design, encompassing various aspects of chip seal performance through aggregate-binder microstructural perspective. New image processing techniques were developed to understand the percent embedment and aggregate orientation behavior. Additionally, finite element analyses were performed using actual chip seal images to evaluate mechanistic characteristics (e.g., magnitudes of strains at the aggregate/binder interface) responsible for chip seal performance. Further, extensive performance tests were run in laboratory to evaluate the effect of design parameters (e.g. percent embedment, aggregate orientation) on chip seal performance distresses (aggregate loss and bleeding). The results were combined and analyzed to yield new insights into effect of microstructural parameters on chip seal performance. Furthermore, a performance-based design procedure was developed for design of chip seals. This procedure integrates the chip seal microstructural behavior and its performance.
Book Synopsis Performance Evaluation of Chip Seals for Higher Volume Roads Using Polymer-Modified Emulsions by : Jeong Hyuk Im
Download or read book Performance Evaluation of Chip Seals for Higher Volume Roads Using Polymer-Modified Emulsions written by Jeong Hyuk Im and published by . This book was released on 2015 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presented a study to evaluate the performance of chip seals for higher traffic volume roads. The evaporation test, bitumen bond strength (BBS) test, and Vialit test were used to investigate curing and adhesive behavior. For the laboratory performance, the third-scale model mobile load simulator (MMLS3) was employed to test for aggregate retention, bleeding, and rutting performance. In field, a total of ten test sections were constructed on three different traffic volume roads using different materials and seal types. Some of the field samples were extracted and moved to the laboratory for performance testing. Also, the field sections were monitored to compare the field performance with the laboratory performance. The main findings presented in this paper were as follows: (1) the laboratory test results indicated that the use of polymer modified emulsions (PMEs) improved the chip seal performance in all areas, i.e., curing and adhesive behavior, aggregate retention, bleeding, and rutting; and (2) the field observations indicated that PME-A (styrene butadiene styrene (SBS) polymer-modified emulsion) performs the best of all the emulsions, regardless of seal type and traffic volume.
Book Synopsis Performance Evaluation of Chip Seals for High Volume Roads Using Polymer-Modified Emulsions and Optimized Construction Procedures by : Jeong Hyuk Im
Download or read book Performance Evaluation of Chip Seals for High Volume Roads Using Polymer-Modified Emulsions and Optimized Construction Procedures written by Jeong Hyuk Im and published by . This book was released on 2013 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chip Seal Best Practices by : Douglas D. Gransberg
Download or read book Chip Seal Best Practices written by Douglas D. Gransberg and published by Transportation Research Board. This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 342: Chip Seal Best Practices examines ways to assist in the development and implementation of pavement preservation programs by identifying the benefits of using chip seal as part of a preventive maintenance program and by highlighting advanced chip seal programs in use around the world. The report includes approximately 40 best practices in the areas of chip seal design methods, contract administration, equipment practices, construction practices, and performance measures. According to the report, the increased use of chip seals for maintenance can be a successful, cost-effective way of using preventive maintenance to preserve both low-volume and higher-volume pavements.
Book Synopsis Field and Laboratory Evaluation of Environmental Effects on Chip Seal Performance by : Nazimuddin M. Wasiuddin
Download or read book Field and Laboratory Evaluation of Environmental Effects on Chip Seal Performance written by Nazimuddin M. Wasiuddin and published by . This book was released on 2015 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip seals generally deteriorate as a result of asphalt oxidation, wear and polishing of aggregates, bleeding, and raveling (loss of aggregates). In this study, two major environmental effects on chip seal performance, freeze-thaw, and asphalt aging were investigated based on laboratory tests and field distress survey. For freeze-thaw evaluation, laboratory chip seal samples were prepared for 18 combinations (6 aggregates X 3 asphaltic materials). A simple freeze-thaw protocol was developed and evaluation of freeze-thaw effect on aggregate types reveals that both the precoated and uncoated expanded shale lightweight aggregates perform comparatively very well against freeze-thaw. Evaluation of freeze-thaw effect on asphaltic material types reveals that CRS-2P, an emulsion performs significantly better than hot asphalts, namely PAC-15 and AC20-5TR. For aging evaluation, asphaltic materials were extracted from 15 (5 aggregates X 3 asphaltic materials) field test sections and increase in stiffness due to aging were determined using a dynamic shear rheometer. For each of the five aggregates, CRS-2P shows the lowest G*/sin?, indicating minimum field aging susceptibility among the three asphaltic materials while AC20-5TR shows slightly higher G*/sin? than PAC-15, indicating maximum field aging susceptibility. Overall field distress ratings of the CRS-2P sections (sum of distress ratings of all the CRS-2P sections) are better than those of PAC-15 and AC20-5TR. The overall distress ratings of PAC-15 sections are better than overall distress ratings of AC20-5TR. In case of aggregate types, precoated expanded shale lightweight test sections performed the best, while expanded clay lightweight sections performed very poorly. Both freeze-thaw and asphalt aging tests closely reflect field performances and it can be concluded that the freeze-thaw and aging performances can be used as effective tools for predicting long term chip seal performances.
Book Synopsis Advanced Characterization of Clear Chip Seals by : Emiliano Pasquini
Download or read book Advanced Characterization of Clear Chip Seals written by Emiliano Pasquini and published by . This book was released on 2014 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip seals are widely used throughout the world for the construction and preventive maintenance of asphalt pavements because they are recognized as cost-effective solutions able to improve skid resistance while creating a waterproof surface. On the other hand, chip seals are often affected by early stone loss because of several, not always easily manageable, material-related and traffic-related factors. It is, therefore, in the interest of researchers to develop scientific methods able to predict the aggregate retention performance of chip seals. Given this background, in the present paper, a performance-based evaluation of chip seals with regard to aggregate retention properties is carried out through a laboratory test based on the Ancona shear testing research and analysis equipment. In this study, a chip seal prepared with a clear emulsion derived by emulsifying a synthetic clear binder was analyzed and compared with two traditional chip seals manufactured with a plain cationic bituminous emulsion and a styrene butadiene styrene polymer-modified asphalt emulsion, respectively. Specifically, six chip seals obtained by combining the three selected emulsions with two types of aggregates (crushed limestone and basalt) were tested at three different temperatures. Moreover, a rheological characterization of emulsion residues was also carried out through the dynamic shear rheometer and the binder bond strength adhesion tester. Results mainly showed that the investigated clear synthetic emulsion can be successfully used for the construction of clear chip seals in combination with aggregates of different mineralogy.
Book Synopsis Chip Seal Performance Measures--best Practices by : Linda M. Pierce
Download or read book Chip Seal Performance Measures--best Practices written by Linda M. Pierce and published by . This book was released on 2015 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this research project are to evaluate different performance indicators for chip seal treatments and to develop trigger values for these indicators that will indicate the end of service life and the appropriate index values for resurfacing. Under Phase I of this study, a formal literature review and detailed survey of transportation agency practices were conducted to identify which pavement distress or combination of distresses best characterize the optimal timing for chip seal application. This report summarizes the findings of the literature review, agency survey, WSDOT pavement management and performance modeling practices, and a recommendation of potential performance models for further evaluation as additional data become available.
Book Synopsis Quantifying the Benefits of Improved Rolling of Chip Seals by :
Download or read book Quantifying the Benefits of Improved Rolling of Chip Seals written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents an improvement in the rolling protocol for chip seals based on an evaluation of aggregate retention performance and aggregate embedment depth. The flip-over test (FOT), Vialit test, modified sand circle test, digital image processing technique, and the third-scale Model Mobile Loading Simulator (MMLS3) are employed to evaluate the effects of the various rolling parameters and to measure chip seal performance. The samples used to evaluate the chip seal rolling protocol were obtained directly from field construction. In order to determine the optimal rolling protocol, the effects of roller type, number of coverages, coverage distribution on the sublayers of a multiple chip seal (i.e., the split seal and triple seal), and rolling pattern are evaluated using the results of aggregate retention performance tests, the modified sand circle method, and the digital image process. It is found that two types of roller, the pneumatic tire roller and the combination roller, are recommended as the optimal rollers for the chip seal. In addition, it is found that the optimal number of coverages for the chip seal, as determined from measurements of the aggregate, is three coverages. Moreover, the performance of the triple seal without coverage at the bottom layer does not affect the aggregate retention performance, although the split seal does require coverage at the bottom layer. Finally, it is found that the rolling pattern is strongly related to a delayed rolling time between the aggregate spreader and the initial rolling time. Therefore, it was recommended that two pneumatic tire rollers applied initial one coverage with optimal delayed rolling time (between 2 min. and 4 min.) to entire lane width, and then the combination roller applied two additional coverages. Further, it is confirmed that the delayed rolling time is related to the aggregate moisture condition and the ambient temperature.
Book Synopsis Proceedings of the ... Annual Symposium on Engineering Geology & Geotechnical Engineering by :
Download or read book Proceedings of the ... Annual Symposium on Engineering Geology & Geotechnical Engineering written by and published by . This book was released on 2009 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Chip Seal Aggregate Retention Using Sweep and Long Term Performance Testing by :
Download or read book Investigation of Chip Seal Aggregate Retention Using Sweep and Long Term Performance Testing written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip seals are a commonly used surface treatment used to decrease the deterioration rate of pavement surfaces. Chip seals typically consist of an application of emulsion and cover aggregate. Failure can be driven by improper strength development and inadequate bonding over time. Additionally, chip seal service life varies and long term performance prediction models are not well established. This study has two primary goals. The first goal is to investigate aggregate retention characteristics of chip seal specimens, while investigating material compatibility by means of the Sweep-M test. The second goal is to begin developing a long term performance (LTP) test to represent cores obtained from full-scale chip seal projects. Conditioning and testing protocols for LTP specimens are evaluated for representative chip seal behavior over long periods. Results confirm material interaction and favor the incorporation of sweep testing for optimum performance. Future testing is recommended for in-depth, LTP test protocol evaluation.
Book Synopsis Evaluation of Stress Absorbing Membrane Seal (SAMS) in Idaho by : Harry Herendeen
Download or read book Evaluation of Stress Absorbing Membrane Seal (SAMS) in Idaho written by Harry Herendeen and published by . This book was released on 1980 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Pavement Performance Program (LTPP) Data Analysis Support by : N. Jackson
Download or read book Long-term Pavement Performance Program (LTPP) Data Analysis Support written by N. Jackson and published by . This book was released on 2006 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance-based Construction Contractor Prequalification by : Douglas D. Gransberg
Download or read book Performance-based Construction Contractor Prequalification written by Douglas D. Gransberg and published by Transportation Research Board. This book was released on 2009 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superpave Mix Design by : Asphalt Institute
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by and published by . This book was released on 1988 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preservation Approaches for High-traffic-volume Roadways by : David G. Peshkin
Download or read book Preservation Approaches for High-traffic-volume Roadways written by David G. Peshkin and published by Transportation Research Board. This book was released on 2011 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R26-RR-1: Preservation Approaches for High-Traffic-Volume Roadways documents the state of the practice of preservation treatment on asphalt and concrete pavements on high- and low-volume roadways. The report also includes general guidelines on the application of preservation treatments on high-volume roadways. The same project that produced SHRP 2 Report S2-R26-RR-1 also produced SHRP 2 Report S2-R26-RR-2: Guidelines for the Preservation of High-Traffic-Volume Roadways, which explores the state of the practice for preservation treatments on high- and low-volume asphalt and concrete roadways. The report also includes suggested guidelines on the application of preservation treatments on high-volume roadways.
