Relevant bibliographies by topics / Full-depth recycling

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Academic literature on the topic 'Full-depth recycling'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Full-depth recycling"

1

Bemanian, Sohila, Patty Polish, and Gayle Maurer. "Cold In-Place Recycling and Full-Depth Reclamation Projects by Nevada Department of Transportation." Transportation Research Record: Journal of the Transportation Research Board 1949, no. 1 (January 2006): 54–71. http://dx.doi.org/10.1177/0361198106194900106.

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Bowers, Benjamin F., David E. Allain, and Brian K. Diefenderfer. "Review of Agency Pavement Recycling Construction Specifications." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 8 (July 1, 2020): 243–51. http://dx.doi.org/10.1177/0361198120931503.

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Cold in-place recycling, cold central plant recycling, and full depth reclamation are cost-effective, environmentally conscious pavement rehabilitation or reconstruction techniques. Although these techniques are not new, they have not been widely adopted among state agencies. There has, however, been a recent resurgence in interest in these techniques. To date there are no national specification guidelines for these processes to assist in their widespread implementation, and those specifications that do exist often have a wide range of requirements. This paper presents the results of a review of state and local agency specifications for pavement recycling techniques and offers suggestions to help agencies achieve a better and longer-lasting product when specifying pavement recycling techniques.
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Berthelot, Curtis, and Ron Gerbrandt. "Full-Depth In-Place Recycling and Road Strengthening Systems for Low-Volume Roads: Highway No. 19 Case Study." Transportation Research Record: Journal of the Transportation Research Board 1819, no. 1 (January 2003): 32–43. http://dx.doi.org/10.3141/1819b-05.

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The province of Saskatchewan has the highest number of public roads per capita in Canada, totaling approximately 198,700 km. The Saskatchewan Department of Highways and Transportation manages approximately 26,100 km of these public roads. As with most public road agencies, the department has limited resources for managing this relatively large network of low-volume roads and therefore continually strives to research and implement more cost-effective and technically feasible solutions. Of particular concern are approximately 7,500 km of thin membrane surface (TMS) roads that are undergoing accelerated damage as truck traffic and loading increase. Although conventional TMS upgrading strategies are normally effective, there are potentially significant benefits to be gained with implementation of more cost-effective methods of road strengthening. Systems include granular soil strengthening and applications of different cement products, lime, various grades of fly ash, geotextiles, geogrids, natural and manufactured fibers, emulsified bitumen, tall oil, lignin, foamed bitumen, and synthetic ionic and cationic chemicals. Since 1999, in conjunction with Pavement Scientific International and in cooperation with the University of Saskatchewan and product suppliers, the department has constructed pilot projects on Highway No. 19 to identify, develop, and implement more cost-effective strengthening systems. The primary research objective is to investigate alternative road construction systems that will improve the load-carrying capacity and environmental durability of Saskatchewan TMS roads. Improved mechanistic engineering methods played a part in this initiative, and pilot project performance was monitored.
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Berthelot, Curtis, and Ron Gerbrandt. "Cold In-Place Recycling and Full-Depth Strengthening of Clay-Till Subgrade Soils Results with Cementitious Waste Products in Northern Climates." Transportation Research Record: Journal of the Transportation Research Board 1787, no. 1 (January 2002): 3–12. http://dx.doi.org/10.3141/1787-01.

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Diefenderfer, Brian K., Ilker Boz, Jhony Habbouche, David Jones, and Adam J. Hand. "Development and Assessment of Rapid Tests for Construction of Asphalt-Treated Cold Recycled Pavements." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 3 (February 28, 2020): 189–98. http://dx.doi.org/10.1177/0361198120908867.

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Pavement recycling techniques, including full depth reclamation, cold in-place recycling, and cold central plant recycling, are effective at rehabilitating existing pavements and constructing new pavements while reducing construction costs, environmental impacts, and construction time. Despite these benefits, these techniques are not used as often as they could be, in part because agencies are unable to assess rapidly the quality of the recycled material or to determine when a recycled pavement has sufficient structural capacity to handle traffic or construction equipment for surfacing, or both, without causing damage, especially at early ages. To describe better the time-critical properties of recycled materials, a series of tests was conducted to assess the stiffness, penetration resistance, and shear and raveling properties of laboratory-produced recycled mixtures sampled from field projects. These tests were conducted to evaluate their potential to discriminate among various factors affecting the behavior of the materials in the laboratory. The study found that penetration resistance tests were most sensitive to the factors assessed, followed by stiffness and then torque values from shear and raveling tests. These tests will be further validated using additional mixture types in the laboratory, and their performance in the field will be studied.
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Li, Taotao. "Study the effect of vibration mixing on the performances of full replacement recycled aggregate concrete." E3S Web of Conferences 276 (2021): 02027. http://dx.doi.org/10.1051/e3sconf/202127602027.

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It is an urgent problem that the construction solid waste is difficult to be treated, and its recycling provides a way for its treatment. The quality of construction solid waste recycled aggregate is lower than that of natural aggregate, which limits its extensive application in building materials. In order to provide a new method for engineering application of recycled aggregate concrete, the influence of vibration mixing on the performances of full replacement recycled aggregate concrete were studied. The performance indexes of recycled aggregate concrete under ordinary mixing and vibration mixing were compared and analyzed. The experimental results show that compared with natural aggregate concrete, the slump of full replacement recycled aggregate concrete decreased by 58.8%, and 7d and 28d compressive strength decreased by 12.9% and 16.1%, and the splitting strength decreased by 30.6% and 20.1%, and the carbonation depth decreased by 91.5%; Compared with natural aggregate concrete using ordinary mixing, the slump of full replacement recycled aggregate concrete using vibration mixing decreased by 50.9%, the 7d and 28d compressive strength decreased by 6.9% and 10.9%, and the splitting strength decreased by 16.9% and 12.4%, and the 28d carbonation depth decreased by 34.9%. The results show that compared with ordinary mixing, vibration mixing can improve the performance of recycled aggregate concrete, which provides a reference for engineering application.
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Boutin, C., R. Parouty, C. Ménoret, A. Liénard, and F. Brissaud. "Modelling of a recirculating granular medium filter's processes." Water Science and Technology 45, no. 12 (June 1, 2002): 241–50. http://dx.doi.org/10.2166/wst.2002.0432.

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The effluents of French small farm factories will soon be submitted to regulation. Only a few treatment techniques are available to deal with these kind of effluent (high concentration and small daily volumes). To allow the treatment, in the particular economic context of small food processing industries, Cemagref is trying to adapt a treatment based on attached growth cultures on fine media, a system known to be easy to operate and relatively inexpensive. A model, based on four sub-models (hydrodynamic characteristics, oxygen transport, solute transport in the mobile and immobile phases and bacterial evolution) describes this process. Based on wastewater concentration, hydraulic load, applied organic loads, feeding / rest cycles and recycling phases number, this model predicts:•eliminated organic loads and the discharge concentration as a function of time,•oxygen and biomass contents as a function of time and depth. The determination of the model's parameters is based on a comparison between simulations and performances achieved on experimental columns. This model would be helpful in sizing full-scale filters treating different types of agro-food wastewater. The aim of this article is to present the model's structure, to give all parameter values and to compare the simulations with the results obtained on pilot and full scale plants.
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Guerrero-Miranda, Paulina, and Arturo Luque González. "Social Responsibility, Sustainability, and Public Policy: The Lessons of Debris Management after the Manabí Earthquake in Ecuador." International Journal of Environmental Research and Public Health 18, no. 7 (March 27, 2021): 3494. http://dx.doi.org/10.3390/ijerph18073494.

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Natural disasters can generate millions of tons of debris and waste, which has an impact on the environment and poses direct risks to the health of the population, hence the need to analyze public policy and its consequences following the 2016 earthquake in Ecuador. Several in-depth interviews were conducted with individuals active in public service during the post-earthquake management period, together with fieldwork analysis of debris management and the institutional strategies for its recycling and reuse in three of the most affected cities: Pedernales, Portoviejo, and Manta. The environmental impact was examined, including its taxonomy of inconsistencies within public administration, alongside the processes of decentralization and shared decision-making. Similarly, the links between corporate social responsibility (CSR), public policy, and sustainability were analyzed at both the national and local level for their wider implications and ramifications. The study highlighted the gaps in the management of such a crisis, exposing a lack of ethics and the shortcomings of social (ir-)responsibility in the distorted processes of public welfare in the country, aspects that should rather work in concert to achieve full sustainable development.
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Guthrie, W. Spencer, Tyler B. Young, Brandon J. Blankenagel, and Dane A. Cooley. "Early-Age Strength Assessment of Cement-Treated Base Material." Transportation Research Record: Journal of the Transportation Research Board 1936, no. 1 (January 2005): 12–19. http://dx.doi.org/10.1177/0361198105193600102.

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To avoid early-age damage to cement-treated base (CTB) materials, the cement must be allowed to cure before the pavement can be opened to traffic. The purpose of this research was to evaluate the utilities of the soil stiffness gauge (SSG), the heavy Clegg impact soil tester (CIST), the dynamic cone penetrometer, and the falling weight deflectometer for assessing early-age strength gain of cement-stabilized materials. Experiments were performed at four sites on a pavement reconstruction project along I-84 in Morgan, Utah, where cement stabilization was used in conjunction with full-depth recycling. Each site was stationed to facilitate repeated measurements at the same locations with different devices and at different curing times. Because of the considerable attention from the pavement construction industry for routine quality control and quality assurance programs, the SSG and CIST were the primary focus of the research. Statistical techniques were used to evaluate the repeatability of these devices and their sensitivity to curing time. The results indicated that although the SSG was more repeatable at one site, the CIST data were markedly more sensitive to curing time than the SSG data at all cement-treated sites during the first 72 h after construction. For this reason, the data suggest that the CIST offers greater overall utility than the SSG for monitoring early-age strength gain of CTB. Further research is needed to investigate appropriate thresholds and protocols for these testing methods that ensure adequate reliability of the collected data.
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Timm, David H., Brian K. Diefenderfer, and Benjamin F. Bowers. "Cold Central Plant Recycled Asphalt Pavements in High Traffic Applications." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 40 (October 5, 2018): 291–303. http://dx.doi.org/10.1177/0361198118801347.

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Cold central plant recycling (CCPR) is gaining wider use in the U.S. for rehabilitating existing asphalt pavements or for new construction. Although it is used widely in lower traffic volume situations, CCPR use in high volume pavements remains an open question when considering its structural capacity and expected performance. A project completed in 2011 on I-81 in Virginia indicated CCPR may be suitable for high-volume traffic applications and was further evaluated with the construction of three CCPR test sections at the National Center for Asphalt Technology Test Track in 2012. These sections are now approaching 20 million equivalent single axle load applications and this paper documents their structural and surface performance thus far. The structural characterization indicates healthy pavements with no significant increases in measured pavement response or decreases in backcalculated moduli over time. Performance has been excellent with no cracking observed on any section, rut depths less than 0.3 inches and ride quality that has remained almost unchanged. Perpetual pavement analyses were also conducted and found that the section with a cement-stabilized base layer supporting the CCPR layer met the criteria and is likely perpetual. The other two sections, without the cement-stabilized base, did not meet the criteria and may develop bottom-up cracking. Data from the I-81 and Test Track sections enabled the Virginia Department of Transport (VDOT) to proceed with a design-build project on I-64 that will feature CCPR with a cement-stabilized base and full-depth reclamation (FDR). It is estimated that nearly 170,000 tons of reclaimed asphalt pavement will be used with over $10 million in savings.
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Dissertations / Theses on the topic "Full-depth recycling"

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Bartku, Elaine Cleare. "In-Situ Recycling: Applications, Guidelines, and Case Study for Local Governments." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49669.

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This thesis investigates the application of In-Situ Recycling and provides guidelines for localities to aid in the selection of recycling methods, as well as documents a local government's experience with Cold In-Place Recycling. The recycling methods discussed in this study include Cold In-Place Recycling (CIR), Hot In-Place Recycling (HIR), and Full Depth Reclamation (FDR). These methods are performed onsite and in-place in a continuous process of milling, mixing, and placement. The In-Situ Recycling guidelines include suggestions based on: traffic characteristics, existing road condition, distress types, road access, local climate, road geometry, and other road characteristics. The guidelines are based on information from sources including NCHRP Synthesis 421, American Recycling and Reclamation Association (ARRA), FHWA, and state agencies with recycling experience. This study also resulted in documenting obstacles that localities may face when in-situ recycling, as well as the impact of limited experience with recycling. The study also evaluated the construction of Cold In-Place Recycled pavement sections in Christiansburg, VA, using Falling Weight Deflectometer (FWD) and Ground Penetrating Radar (GPR). Additionally, using the FWD and GPR data, alternate recycled designs were proposed in addition to a cost comparison to a conventional design.
Master of Science
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2

Dixon, Paul A. "Factors Affecting the Strength of Road Base Stabilized with Cement Slurry or Dry Cement in Conjunction with Full-Depth Reclamation." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2629.

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Full-depth reclamation (FDR) in conjunction with cement stabilization is an established practice for rehabilitating deteriorating asphalt roads. Conventionally, FDR uses dry cement powder applied with a pneumatic spreader, creating undesirable fugitive cement dust. The cement dust poses a nuisance and, when inhaled, a health threat. Consequently, FDR in conjunction with conventional cement stabilization cannot generally be used in urban areas. To solve the problem of fugitive cement dust, the use of cement slurry, prepared by combining cement powder and water, has been proposed to allow cement stabilization to be utilized in urban areas. However, using cement slurry introduces several factors not associated with using dry cement that may affect road base strength, dry density (DD), and moisture content (MC). The objectives of this research were to 1) identify construction-related factors that influence the strength of road base treated with cement slurry in conjunction with FDR and quantify the effects of these factors and 2) compare the strength of road base treated with cement slurry with that of road base treated with dry cement. To achieve the research objectives, road base taken from an FDR project was subjected to extensive full-factorial laboratory testing. The 7-day unconfined compressive strength (UCS), DD, and MC were measured as dependent variables, while independent variables included cement content; slurry water batching temperature; cement slurry aging temperature; cement slurry aging time; presence of a set-retarding, water-reducing admixture; and aggregate-slurry mixing time. This research suggests that, when road base is stabilized with cement slurry in conjunction with FDR, the slurry water batching temperature; haul time; environmental temperature; and presence of a set-retarding, water-reducing admixture will not significantly affect the strength of CTB, provided that those factors fall within the limits explored in this research and are applied to a road base with similar properties. Cement content and cement-aggregate mixing time are positively correlated with the strength of CTB regardless of cement form. Additionally, using cement slurry will result in slightly lower strength values than using dry cement.
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Cooley, Dane A. "Effects of Reclaimed Asphalt Pavement on Mechanical Properties of Base Materials." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1094.pdf.

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Conference papers on the topic "Full-depth recycling"

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Guthrie, W. S., and T. B. Young. "Evaluation of Transition Cement for Stabilization of Frost-Susceptible Base Material in Conjunction with Full-Depth Recycling in Weber Canyon, Utah." In 13th International Conference on Cold Regions Engineering. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40836(210)59.

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Reports on the topic "Full-depth recycling"

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Thompson, Marshall, and Ramez Hajj. Flexible Pavement Recycling Techniques: A Summary of Activities. Illinois Center for Transportation, July 2021. http://dx.doi.org/10.36501/0197-9191/21-022.

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Cold in-place recycling (CIR) involves the recycling of the asphalt portions (including hot-mix asphalt and chip, slurry, and cape seals, as well as others) of a flexible or composite pavement with asphalt emulsion or foamed asphalt as the binding agent. Full-depth reclamation (FDR) includes the recycling of the entire depth of the pavement and, in some cases, a portion of the subgrade with asphalt, cement, or lime products as binding agents. Both processes are extensively utilized in Illinois. This project reviewed CIR and FDR projects identified by the Illinois Department of Transportation (IDOT) from the Transportation Bulletin and provided comments on pavement designs and special provisions. The researchers evaluated the performance of existing CIR/FDR projects through pavement condition surveys and analysis of falling weight deflectometer data collected by IDOT. They also reviewed CIR/FDR literature and updated/modified (as appropriate) previously provided inputs concerning mix design, testing procedures, thickness design, construction, and performance as well as cold central plant recycling (CCPR) literature related to design and construction. The team monitored the performance of test sections at the National Center for Asphalt Technology and Virginia Department of Transportation. The researchers assisted IDOT in the development of a CCPR special provision as well as responded to IDOT inquiries and questions concerning issues related to CIR, FDR, and CCPR. They attended meetings of IDOT’s FDR with the Cement Working Group and provided input in the development of a special provision for FDR with cement. The project’s activities confirmed that CIR, FDR, and CCPR techniques are successfully utilized in Illinois. Recommendations for improving the above-discussed techniques are provided.
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Al-Qadi, Imad, Hasan Ozer, Mouna Krami Senhaji, Qingwen Zhou, Rebekah Yang, Seunggu Kang, Marshall Thompson, et al. A Life-Cycle Methodology for Energy Use by In-Place Pavement Recycling Techniques. Illinois Center for Transportation, October 2020. http://dx.doi.org/10.36501/0197-9191/20-018.

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Worldwide interest in using recycled materials in flexible pavements as an alternative to virgin materials has increased significantly over the past few decades. Therefore, recycling has been utilized in pavement maintenance and rehabilitation activities. Three types of in-place recycling technologies have been introduced since the late 70s: hot in-place recycling, cold in-place recycling, and full-depth reclamation. The main objectives of this project are to develop a framework and a life-cycle assessment (LCA) methodology to evaluate maintenance and rehabilitation treatments, specifically in-place recycling and conventional paving methods, and develop a LCA tool utilizing Visual Basic for Applications (VBA) to help local and state highway agencies evaluate environmental benefits and tradeoffs of in-place recycling techniques as compared to conventional rehabilitation methods at each life-cycle stage from the material extraction to the end of life. The ultimate outcome of this study is the development of a framework and a user-friendly LCA tool that assesses the environmental impact of a wide range of pavement treatments, including in-place recycling, conventional methods, and surface treatments. The developed tool provides pavement industry practitioners, consultants, and agencies the opportunity to complement their projects’ economic and social assessment with the environmental impacts quantification. In addition, the tool presents the main factors that impact produced emissions and energy consumed at every stage of the pavement life cycle due to treatments. The tool provides detailed information such as fuel usage analysis of in-place recycling based on field data.
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Journal articles
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