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Author : Leonard E. Wood
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (175 download)
Download or read book Current Practice of Cold In-place Recycling (CIR) of Asphalt Pavements written by Leonard E. Wood and published by . This book was released on 1988 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mary Stroup-Gardiner
Publisher :
ISBN 13 : 9780309674188
Total Pages : 0 pages
Book Rating : 4.6/5 (741 download)
Download or read book Practice and Performance of Cold In-place Recycling and Cold Central Plant Recycling written by Mary Stroup-Gardiner and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold in-place recycling (CIR) is a process in which 3 to 4 inches of the existing asphalt pavement layers are pulverized, mixed with a recycling agent, and repaved in place. It provides agencies with cost-effective and environmentally friendly pavement maintenance and rehabilitation options for aged asphalt pavements. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 569: Practice and Performance of Cold In-Place Recycling and Cold Central Plant Recycling compiles and documents information regarding the current state of practice on how CIR and cold central plant recycling (CCPR) technologies are selected, designed, constructed, and evaluated by state departments of transportation (DOTs).
Author : Todd V. Scholz
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (1 download)
Download or read book In-depth Study of Cold In-place Recycled Pavement Performance: Construction and inspection manual written by Todd V. Scholz and published by . This book was released on 1990 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hosin David Lee
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (1 download)
Download or read book Validation of the Mix Design Process for Cold In-place Rehabilitation Using Foamed Asphalt written by Hosin David Lee and published by . This book was released on 2007 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavement recycling has grown dramatically over the last few years as a viable technology to rehabilitate existing asphalt pavements. Iowa's current Cold In-place Recycling (CIR) practice utilizes a generic recipe specification to define the characteristic of the CIR mixture. As CIR continues to evolve, the desire to place CIR mixture with specific engineering properties requires the use of a mix design process. A new mix design procedure was developed for Cold In-place Recycling using foamed asphalt (CIR-foam) in consideration of its predicted field performance. The new laboratory mix design process was validated against various Reclaimed Asphalt Pavement (RAP) materials to determine its consistency over a wide range of RAP materials available throughout Iowa. The performance tests, which include dynamic modulus test, dynamic creep test and raveling test, were conducted to evaluate the consistency of a new CIR-foam mix design process to ensure reliable mixture performance over a wide range of traffic and climate conditions. The "lab designed" CIR will allow the pavement designer to take the properties of the CIR into account when determining the overlay thickness.
Author : RA. Tarefder
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (125 download)
Download or read book Field and Laboratory Properties of Lime-Treated Cold In-Place Recycled Asphalt Pavements written by RA. Tarefder and published by . This book was released on 2006 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold recycling is a technically promising and cost effective method for improving distressed asphalt pavements. Unlike hot-mix recycling, cold recycling lacks extensive field and laboratory performance data. There is no widely accepted cold in-place recycling (CIR) mix design and testing standard available. This study attempts to generate useful field and laboratory data on pavements constructed with CIR mix and technique. Two field case studies are conducted. The testing of field cores and laboratory samples from these two field sites is conducted to address the existing and new methods for design and performance testing of CIR mixes in partial depth pavements. The laboratory tests include physical property testing (e.g., moisture content, gradation, air voids, emulsion, and aggregate properties) and performance-related testing (e.g., resistance to deformation, retained strength, rut, and fatigue). Relative performances of the CIR mixes from the two sites are analyzed.
Author : Jon A. Epps
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.3/5 (555 download)
Download or read book Cold-recycled Bituminous Concrete Using Bituminous Materials written by Jon A. Epps and published by Transportation Research Board National Research. This book was released on 1990 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to pavement designers, construction engineers, and others interested in economical methods for reconstructing or rehabilitating bituminous pavements. Information is provided on the processes and procedures used by a number of states to recycle asphalt pavements in place without application of heat. Since 1975 a growing number of state highway agencies have reconstructed or rehabilitated asphalt pavements by recycling the old pavement in place. This report of the Transportation Research Board describes the processes used for cold in-place recycling, including construction procedures, mix designs, mixture properties, performance, and specifications.
Download or read book New Developments in Hot In-place Recycling of Asphalt Pavements written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recycling of asphalt pavements has become a widely accepted practice, particularly in North America and Europe. Several technologies have emerged to fill the various rehabilitation needs, depending on local conditions, type of pavement, and the future use of the roadway. Both hot and cold recycling in a central plant are routinely practiced. Cold in-place recycling (CIR) and full depth reconstruction is used by many highway agencies to restore surfaces and stabilize existing roadways for future overlays. Hot in-place recycling (HIR) has been used sparingly during the past 50 years, and only since the late 1980s have acceptable processes and equipment been developed. Much of the technolgical development, experience, and HIR technology has occurred in Canada, where highway agencies have embraced the concept and equipment manufacturers have provided innovations. The paper briefly describes the development and special characteristics of the various HIR processes. It describes the development of a new heating system that combines recirculating hot air with low-level indirect infrared components. In addition, a stirring mechanism has been incorporated in the heating system to ensure more uniform heating of the loose asphalt mixture and efficient removal of any moisture. The recirculated hot air is reheated, and then incinerated, thereby providing a significant improvement in air quality compared to previous generations of HIR equipment. The data from early trials in British Columbia, Canada show that the productivity is increased and the quality of recycled pavement is improved. In recent years air quality has been a factor in the acceptance of HIR in North America. Monitoring of the quality of air released at the new heating system shows the particulate matter and other solids to be the lowest among HIR systems tested. Additional projects are currently underway in Europe using the latest version of this equipment that was developed by Martec Recycling Corporation and these may provide additional data for the presentation. For the covering abstract of this conference see IRRD number 872978.
Author : National Research Council (U.S.). Transportation Research Board
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (359 download)
Download or read book Recycling Materials for Highways written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1978 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This synthesis will be of special interest and usefulness to design engineers, materials technologists, and others seeking information on the potential use of recycled materials in design, construction, rehabilitation, and maintenance of pavements, bases, and other components of the highway system. Detailed information is presented on procedures for pavement recycling."--Avant-propos.
Download or read book Report on Cold Recycling of Asphalt Pavements written by and published by . This book was released on 1998 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The responsibility of Task Force No. 38 was defined to be as follows: The Task Force would address the cold processing of reclaimed asphalt pavement (RAP) with or without additional additives and/or aggregates to create a rehabilitated component of the pavement structure. This report contains information on the cold recycling process, project selection and assessment, cold recycled mixture and pavement structural design, quality control and testing, guidelines for construction specifications and definitions of terms.
Author : J. Paul Guyer
Publisher : Guyer Partners
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4./5 ( download)
Download or read book An Introduction to Cold Recycling of Asphalt Concrete Pavement for Professional Engineers written by J. Paul Guyer and published by Guyer Partners. This book was released on 2022-12-27 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers and other professional engineers and construction managers interested in cold recycling of asphalt concrete pavement. Here is what is discussed: 1. INTRODUCTION, 2. BACKGROUND, 3. INITIAL PROJECT SELECTION CRITERIA, 4. TRAFFIC, 5. STRUCTURAL ASSESSMENT, 6. OVERLAY THICKNESS DESIGN, 7. INITIAL STRUCTURAL SUPPORT, 8. PROJECT LENGTH, 9. CURING, 10. UTILITIES, 11. SURFACE TREATMENTS, 12. PAVING FABRICS, GEOSYNTHETICS AND CRACK SEAL, 13. PATCHES, 14. FINAL PROJECT SELECTION, 15. ECONOMIC ASSESSMENT, 16. SUMMARY, 17. SIGNIFICANT IN-PLACE RECYCLING RESOURCES, 18. REFERENCES.
Author : Alex Jackson
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (125 download)
Download or read book Reducing Sample Size for Cold In-Place Recycling Design and Testing written by Alex Jackson and published by . This book was released on 2015 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many current methods of designing and testing cold in-place recycled (CIR) asphalt are undesirable because they require large amounts of material and significant preparation. In an effort to lessen the cost and time of materials testing, this research utilizes several different methods of small scale testing of creep stiffness. These methods include using a discovery hybrid rheometer (DHR) and a three point bending test to find the creep stiffness of emulsion based CIR. The new testing methods used samples on the scale of up to a hundredth the size of what the traditional methods of testing require. The two smaller scale tests were compared to the traditional indirect tension test (IDT) testing. In order to fully evaluate the two reduced sample size test methods, this research observed the effect of gradation, temperature, emulsifier type, and recycled asphalt pavement (RAP) content on creep stiffness. If successful, the use of these new test methods could significantly decrease the damage done to roads, and reduce the cost of material management incurred through the quality control testing methods for pavement. Results showed very good correlation between DHR and IDT testing with a proportional difference between the samples. The standard deviations between the DHR and IDT testing were 18.6 % and 19.2 % of the mean values, respectively, indicating similar accuracies of tests. The tests were also able to distinguish between types of material. The proportional difference between the IDT and DHR is expected and is due to the difference of sample and loading configuration. With the proper shift factor, it is suggested that the DHR can provide similar results with significantly less material versus the traditional IDT test.
Author : Janki Bhavsar
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.:/5 (926 download)
Download or read book Comparing Cold In-place Recycling (CIR) and Cold In-place Recycling with Expanded Asphalt Mixture (CIREAM) written by Janki Bhavsar and published by . This book was released on 2015 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold Mix Asphalt (CMA) is used in several rehabilitation techniques, which uses 100% Reclaimed Asphalt Pavement (RAP), thus making it a sustainable product in the industry. Using CMA for rehabilitation decreases the energy consumption and greenhouse gas emissions. In Ontario, it has been implemented over the past 17 years. There are two main techniques used for CMA: Cold In-Place Recycling (CIR) and Cold In-Place Recycling with Expanded Asphalt Mixture (CIREAM). It is necessary to determine the performance of these techniques in order to determine the age of the pavement and expand their applications. There is a lack of laboratory and field performance information in Ontario for these two techniques. Thus, in this study, laboratory investigation was carried out to establish and compare the material performance of CIR and CIREAM. In addition, a field study was conducted which involved the evaluation of several road sections which have used CIR and CIREAM techniques. For this project, the test material was collected from road sections in Ontario, thus, this study was focused on CIR and CIREAM applications in Ontario and tests were based on standards followed by the province. Although the study was conducted for Ontario, the methodology may be applied outside of Ontario with similar climate conditions. However, the results would vary based on the type of material used. The laboratory study included testing for the overall stiffness, tensile strength, and fatigue behavior of the test samples to simulate their long-term performance. RAP was extracted from southern and northern parts of Ontario to make the test samples. A curing duration test was conducted using the dynamic modulus test apparatus. This test was done to determine a curing time of CIR samples in the laboratory which provided the best stiffness. For the stiffness test, sample mixes were constructed with varying percentages of asphalt cement (AC). From these mixes, the best performing mix was chosen based on its workability, rutting resistance and overall stiffness. The fatigue and tensile strength tests were conducted using the optimal mix chosen from the stiffness test and the samples were cured according to the results from the curing duration test. From the curing duration test, it was concluded that curing the CIR samples for 14 days after compaction gave a higher stiffness to the mix. For the CIR mixes using southern Ontario RAP, the mix with 3.2%AC performed well in comparison to the other mixes. The CIREAM mixes with varying percentages of AC had an overall similar performance. The fatigue testing showed that both CIR and CIREAM samples had similar fatigue resistance. The TSRST tests showed that CIR samples exhibited more shrinkage in comparison to CIREAM and they had higher tensile stresses at failure. The dynamic modulus testing of the CIR samples using northern Ontario RAP showed no statistically significant differences between the mixes. The gradation of the RAP used had a large impact on the stiffness and workability of the sample mixes and their performance. The field study included road sections with varying roadway and pavement attributes. Data was collected from various municipalities which included the City of Waterloo, County of Peterborough, Region of Northumberland, York Region, Haldimand County, County of Perth, County of Wellington, and the united counties of Stormont, Dundas and Glengarry, along with the Ministry of Transportation Ontario (MTO). This data highlighted the limits of all road sections which had implemented CIR or CIREAM within the municipalities. Approximately 200 road sections were identified which had used CIR or CIREAM techniques. These sections were visually inspected in three different municipalities; specifically the City of Waterloo, Perth County, and the united counties of Stormont, Dundas and Glengarry. From the visual inspections large amounts of deteriorations were observed where greater number of trucks, poor drainage and low speeds were prevalent. Field data evaluation showed no significant effect on physical condition, PCI or rut depth of the roadway due to age, AADT or AADTT, respectively. To date, these techniques are used on low volume roadways but there is also an opportunity to expand to higher volume roadways to promote sustainable use of recycled asphalt. These techniques are sustainable due to their use of 100% recycled aggregates and low energy consumption. Thus, by closing the research gap on their performance information, it would help broaden their application.
Author :
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.X/5 (4 download)
Download or read book Standard Practice for Pavement Recyling written by and published by . This book was released on 1988 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mary Stroup-Gardiner
Publisher :
ISBN 13 : 9781621982746
Total Pages : 70 pages
Book Rating : 4.9/5 (827 download)
Download or read book Recycling and Reclamation of Asphalt Pavements Using In-place Methods written by Mary Stroup-Gardiner and published by . This book was released on 2011 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Discusses the use of hot in-place recycling, cold in-place recycling, and full-depth reclamation of asphalt pavements. In-place recycling and reclamation of asphalt pavements provides agencies with the ability to optimize the value of in-place materials, minimize construction time and traffic flow disruptions, and reduce the number of construction vehicles moving in and out of the construction area."--Provided by publisher.
Author : Stephen Alan Cross
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (456 download)
Download or read book Evaluation of Cold In-place Recycled Mixtures on US-283 written by Stephen Alan Cross and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kansas Department of Transportation (KDOT) by cold in-place recycling (CIR) recycles approximately 120 to 160 km of pavement a year as a part of their 1-R maintenance program. Originally KDOT utilized asphalt emulsions (AE) as the additive in CIR mixtures, but based on performance concerns currently utilizes type C fly ash. Recent research indicates that the use of CIR with asphalt emulsion and hydrated lime, introduced as hot slurry, provides improved performance. KDOT constructed two test sections on US-283 using type C fly ash and CSS-1 with hot lime slurry and type C fly ash. Two additional asphalt emulsions were evaluated as well, CMS-1 and HFE-150. The cores and laboratory samples were tested for tensile strength, AASHTO T283, resilient modulus and for rutting resistance and moisture damage using the Asphalt Pavement Analyzer (Georgia Rut Tester).
Author : Erica Ann Yeung
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (15 download)
Download or read book Exploring Compaction Effects on Cold In-place Recycling Mixtures Using Emulsified Asphalt written by Erica Ann Yeung and published by . This book was released on 2017 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold in-place recycling (CIR) is a process that takes three to four inches of existing pavement surface and reuses 100% of it by milling and crushing it, adding asphalt emulsions and/or additives to it, before placing and re-compacting it. There is currently very little research regarding the interaction between the crushed aggregate and asphalt emulsion during the CIR process. In this study, the interactions between the combinations of crushed aggregates and asphalt emulsions were investigated along with select compaction metrics and a raveling performance test. The three types of aggregates included coated limestone, recycled asphalt pavement (RAP), and coated syenite. The two types of emulsifiers included a commodity and a proprietary one. The compaction metrics explored the compaction behavior of CIR and the raveling test is a standard test that evaluates a mixture's resistance to raveling under initial traffic. The results of this project indicated crushing aggregate and waiting between one hour to one day before mixing can be more optimal for easier compactibility than crushing and mixing immediately or waiting one week later. Not only were the results seen in the compaction metrics, but in the raveling test as well.
Author : Brian James Ellsworth
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (4 download)
Download or read book Subgrade Stability of Cold In-place Recycled Asphalt Projects written by Brian James Ellsworth and published by . This book was released on 1998 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold in-place asphalt recycling (CIR) has proven to be an effective technique for the rehabilitation of asphaltic concrete pavements. Though the process provides economic and performance benefits, engineers and contractors may be unfamiliar with project selection, design, and construction procedures. Some projects designed as CIR projects have failed during the construction process. After such failures occur, alternate rehabilitation methods must be used. This is expensive and inconvenient for both the contractor and the contracting agency. Subgrade stability problems can prevent a CIR project from being successful. After the existing asphalt is milled for recycling, construction equipment is only supported by the subgrade materialand the little asphalt that remains.
