The objective of this part of the research is to develop a guideline document for pavement rehabilitation design using fulldepth reclamation. Aashto pavement thickness design guide when designing pavement thickness for flexible and rigid pavements, the following considerations should be used. Fulldepth pavement reclamation with foamed asphalt. Materials and mix design, construction methods and equipment, case histories and quality control quality assurance have been discussed for all recycling methods. Full depth reclamation pulverized flexible pavement section creating a uniform stabilized base further stabilization obtained through. One such technique that holds promise of providing this type of solution is full depth reclamation fdr. The completed pavement is expected to last more than 20 years. Material properties of cold inplace recycled and fulldepth reclamation asphalt concrete 2017. An 14 evaluation project was initiated by indot research and development to estimate the structural contribution and. Virginia experience past and present march 2, 2018 what is full depth reclamation fdr vdot experience outline virginia department of transportation. One of the faster pavement construction techniques is fdr fulldepth reclamation.
A 2week notice to the engineerincharge and the regional. Governments participants reference book, federal highway. Fdr is an inplace recycling method for reconstruction of existing flexible pavements using the existing pavement section material as the base for the new roadwaywearing surface. Learn how full depth reclamation restores the life of. Full depth reclamation fdr is a flexible pavement recycling technique that has not. At 58 inches in diameter, the wheel has 256 tungsten carbide teeth in a staggered pattern. Full depth reclamation was chosen over a more traditional remove and replace approach because deep underlying pavement problems could be resolved and structural performance targets could be met at a fraction of the cost. A very popular reconstruction alternative is known as full depth reclamation fdr.
Evaluation of fulldepth reclamation on strength and. Advantages of fulldepth pavement reclamation asphalt. Perform full depth reclamation fdr using an inplace mixing process to obtain a homogenous mixture of the existing surface and the underlying base material with or without new material and additive added using an emulsified asphalt. Full depth reclamation and stabilized full depth reclamation 1252016. Keywords lcca, life cycle cost analysis, rehabilitation costs, heater remixing, heater scarifying, cold in.
Rehabilitating an old pavement by pulverizing and stabilizing the existing pavement. Refer to guidelines and design process for full depth reclamation listed tn chapter 2. Material properties of cold inplace recycled and fulldepth. Pavement pres 1 pervious concrete making the impossible possible pres 2 i85 rcc shoulder construction in nc pres 3 full depth reclamation fdr virginia experience past and present pres 4 engineering more sustainable pavements pres 5 vdot mechansticempirical pavement design mepdg implementation pres 6, a tool for. Eb 15025 page 1 of 18 geotechnical engineering manual. Full depth reclamation fdr is one of the three major types of asphalt recycling techniques. Full depth reclamation fdr consists of pulverizing the asphaltwearing layer top of the road into the base material and evening the subbase material to depths of up to 300 mm. Hot inplace recycling was further broken into three categories. Laboratory comparison of full depth reclamation stabilization.
During this process, the old materials are pulverized, mixed, and treated with a stabilizing agent such as cement or asphalt emulsion to produce a likenew road base. Guidelines for project selection, design, and construction. Learn about full depth reclamation of pavement with lindsi hammond full depth reclamation of pavement full depth reclamation fdr of pavement is an alternative rehabilitation technique that uniformly pulverizes and blends together stabilizing agents with wornout asphalt concrete pavement and a portion of the underlying materials. Using the 4th power approximation, determine the total equivalent damage caused by this bus in terms of esals when. Pavement design and materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis. Fdr can be used to depths of 300 mm 12 inches or more but the most typical applications involve depths of between 150 and 225 mm 6 and 9 inches better roads, 2001 1. Full depth reclamation is typically used on roads that have moderate to severe pavement distress and underlying base issues. Pavement structural evaluation and design of fulldepth. Fulldepth reclamation with cement is an engineered.
In summary, full depth reclamation converts a wornout asphalt pavement into a stabilized base course. Full depth reclamation using asphalt emulsion roadmixed for project 047901019 in reeves county. Comparison of design thickness between the 1993 aashto guide and mepdg for full depth reclamation pavement. Fulldepth pavement reclamation, however, sidesteps many of these complications. Mix design for fulldepth reclaimed asphalt pavement with. The fullfactorial experimental design included five rap. Other indications that a road could use fdr are frequent transverse and lateral cracking, reflective cracking, severe rutting. Mix design structural pavement design construction manual traffic control plan owneragency requirements stabilizing agent. Fulldepth reclamationrecycling fdr, or deep insitu, recycling of damaged hotmix asphalt hma pavement with foamed asphalt fa and an active filler such as portland cement or lime can provide a stabilized base for a new hotmix asphalt wearing course. Learn about fulldepth reclamation of pavement with lindsi. If these mechanistic benchmarks are not exceeded, then there is a very high likelihood that the pavement will not suffer traditional bottomup fatiguing or full depth subgrade failure rutting. Old asphalt and base materials are pulverized using a specialized machine called a reclaimer. Although not a preservation strategy, full depth reclamation fdr is a proven alternative to traditional reconstruction.
Using the materials properties measured in the lab and the. Fulldepth reclamation, fdr, pavement, cementtreated base, ctb, cement stabilization, longterm performance, soilcement. Fdr is an economical, inplace recycling alternative to road reconstruction. Unconfined compressive strength of lime treated soils and aggregates. Best practices for full depth reclamation using asphalt emulsions background 5 mixture designs for fdr projects stabilized with emulsion are varied. Pavement design road surface strength of materials. Full depth recycling or full depth reclamation fdr, is a process that rebuilds worn out asphalt pavements by recycling the existing roadway. Trbs national cooperative highway research program nchrp research report 863. Inplace recycling pulverizing or full depth reclamation. Full depth reclamation is a type of complete road reconstruction where the old pavement and base materials are not removed. These samples shall be used to establish the design rate of expanded asphalt as a. Fulldepth pavement reclamation with foamed asphalt in california.
A research project was initiated by indiana department of transportation to estimate the structural contribution and feasibility of full depth reclamation fdr bases for pavement structure under a lowmedium volume traffic loading. Part 2 design a flexible pavement for this number of esals. Quality asphalt pavement may be constructed in a wide range. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. Measure properties on caltrans full depth pavement reclamation with foamed asphalt projects to be built in the future. Officials aashto procedure for pavement design, for example, uses a structural layer coefficient to model base. Chapter 9 full depth flexible pavement design chapter 9. Fdr promotes the reuse of existing road materials and significantly reduces the use of. Methods in use are marshall, superpave, wirtgen wirtgen 2004, proctor aashto t99, modified proctor kim and labuz 2007, and unconfined compressive strengths. The following standards are from ac 150537010h, standards for specifying construction of airports.
This participants reference book was developed to support a 2day workshop on pavement recycling guidelines for state and local governments. The process uses a machine called a reclaimer or pulverizer thats equipped with an 8footwide mandrel cutting wheel. Full depth reclamation fdr is an engineered rehabilitation technique in which the full thickness of the asphalt pavement and a predetermined portion of the underlying materials base, subbase andor subgrade is uniformly pulverized and blended to provide an upgraded, homogeneous material. Although there has been much research and testing efforts with warm mix asphalt wma technologies and the use of hot mix asphalt hma with high reclaimed asphalt pavement rap content, minimal resources have been focused on exploring the advantages of coldrecycling technology, particularly cold inplace recycling cir and full depth. Fdr removes pavement crack patterns and eliminates reflective cracking. Carry out laboratory testing to identify specimen preparation and test methods, and develop information for mix design, structural design, and construction guidelines. Section 7 of bulletin 27 bituminous concrete mixtures, design procedures and specifications for special bituminous mixtures. This cementstabilized base is then surfaced to provide a new, longlasting pavement structure. A method of reconstructing a bituminoussurfaced pavement is provided.
Full depth pavement reclamation, however, sidesteps many of these complications. Fdr conserves materials by reusing pavement components. Therefore, there is a need for an increased understanding of maintenance and rehabilitation techniques that can restore the longterm condition of a pavement in a costeffective and environmentally friendly manner. Research scientist introduction pavement recycling has become an increasingly common technology to restore the. There is an everincreasing backlog of rehabilitation needs with minimal resources. It uses a powerful reclaiming machine to turn an old asphalt pavement into a road base by uniformly pulverizing that full thickness of the old pavement and blending it with a portion of underlying material. For mix design purposes, prior to commencing the work the contractor shall obtain samples representative of the material that is produced during inplace full depth reclamation. Full depth reclamationrecycling fdr this rehabilitation procedure entails pulverizing the old pavement structure, blending in a stabilizing agent. Guide to fulldepth reclamation fdr with cement by david r. Full depth reclamation fdr has been defined as a recycling method where all of the asphalt section and a predetermined amount of the underlying base and subgrade section are pulverized and treated to produce a stabilized base course.
Full depth reclamation fdr with cement is a procedure where failed asphalt pavements are pulverized and reclaimed. Fdr for asphalt pavement with cement as the stabilizer was used as the base course. This 2016 asphalt pavement design guide has been prepared to assist readers in understanding asphalt mix pavement design, construction, and rehabilitation. Best practices for fulldepth reclamation using asphalt. Surface preparation in order to assure the existing pavement and base materials are suitable for the fdr process, it is recommended that sampling and testing of the road is performed in advance of the project. To view the entire ac and the latest errata sheet, select the complete ac link below. Best practices for fulldepth reclamation using asphalt emulsions background 5 mixture designs for fdr projects stabilized with emulsion are varied. Although referred to as fulldepth reclamation, this process is just an extension of the basic cir principles to the entire hma pavement depth plus a predetermined depth of the base material. Comparing layer types for the use of pavementme for asphalt.
Design of fulldepth reclamation with portland cement fdr. This method provides a very economic alternative to conventional construction methods by reusing the existing pavement material. Full depth reclamationrecycling fdr this rehabilitation procedure entails pulverizing the old pavement structure, blending in a stabilizing agent, compacting, adding additional material, and resurfacing. Us7455476b2 method of reconstructing a bituminoussurfaced. Full depth recycling or full depth reclamation fdr, is a process that rebuilds worn out asphalt pavements by recycling the existing roadway processes. Design of fulldepth reclamation with portland cement fdrpc. If a long section of thick asphalt is selected for reclamation, the asphalt layer can be partially milled and the rap. Comparison of design thickness between the 1993 aashto. Full depth reclamation process design overview 3 design criteria in order to design a mix to satisfy the objectives of the project the existing pavement must be investigated for structural adequacy, thickness, slope and crossfall as well as the visual appearance.
Full depth reclamation fdr is a recycling technique where the existing asphalt pavement and a predetermined portion of the underlying granular material are blended to produce an improved base course. Full depth reclamation is a pavement rehabilitation technique in which the full flexible pavement section and a predetermined portion of the underlying materials are uniformly crushed, pulverized or blended. Txdot specifications 2014 english special specifications. Full depth reclamation is a reclamation technique in which the full flexible pavement section and a predetermined portion of the underlying materials are uniformly crushed, pulverized, or blended, resulting in a stabilized base course. The process uses a machine called a reclaimer or pulverizer that is equipped with an 8footwide mandrel cutting wheel. What is full depth reclamation fdr full depth reclamation is a pavement rehabilitation technique in which the full flexible pavement section and a predetermined portion of the underlying materials are uniformly crushed, pulverized or blended. These limiting strain criteria find their full potential in the perpetual pavement design. Analysis of full depth reclamation trial sections in virginia brian k. Pavement structural evaluation and design of full depth reclamation fdr pavement by tommy nantung, ph.
Full depth reclamation fdr of asphalt pavements is a rehabilitation technique where the existing asphalt pavement some, or all, of the base course, and some of the subgrade are uniformly pulverized and blended to form a new, homogenous base course. Also known as asphalt pulverization, full depth reclamation is a construction rehabilitation technique of removing the distressed layer of existing asphalt, blending it with the existing stone base, and creating a recycled usable base for the new asphalt. Pavement investigation, engineering and design from heavily traveled urban interstate highways to city streets and county roads or low volume site access, aets pavements group is a leading provider of pavement surfacing and subsurface investigations, pavement materials engineering and pavement design for new construction, rehabilitation and. Addition of aggregate addition of stabilizers liquid asphalt portland cement. Emulsified asphalts, fillers, virgin aggregates or recycled asphalt pavements rap can be added to maximize the effectiveness of the system. Material properties of cold inplace recycled and full depth reclamation asphalt concrete presents procedures for determining material properties of coldrecycled asphalt mixtures for input to pavement structural design programs. Sustainable pavement rehabilitation according to the 2017 asce infrastructure report card, our nations roadway infrastructure is in poor condition. Design full depth reclamation kandhal and mallick 1997. Learn how full depth reclamation restores the life of pavement structures that have deep structural issues while avoiding highcost pavement reconstruction. Full depth reclamation new provision contract standards adds full depth reclamation fdr to section 542 of the 2012 standard specifications geotechnical summary tables rev form geotech adds tables for geotextile for pavement stabilization and aggregate subgrades tabilization.
Full depth reclamation and stabilized full depth reclamation. This method includes evaluating the pavement to determine if it is an appropriate candidate for full depth reclamation. Construction inspection checklist full depth reclamation. A procedure is available, called fulldepth reclamation with portland cement fdr pc, which allows these failed asphalt pavements to be recycled and stabilized, creating a new base that will provide an excellent foundation for longterm. Full depth reclamation using foamed asphalt pdf full depth reclamation using cement pdf pulverization. Fulldepth reclamation using portland cement southeast cement. Pavement design using fdr 2008 is the dividing line. Full depth reclamation fdr with cement is a procedure where failed asphalt pavements are pulverized and reclaimed, using cement to stabilize the recycled materials and create a new pavement base. Full depth reclamation fdr of pavement is an alternative rehabilitation technique that uniformly pulverizes and blends together stabilizing agents with wornout asphalt concrete pavement and a portion of the underlying materials. Airport construction standards ac 150537010 airports. The standard axle weights for a standingroomonly loaded metro articulated bus 60 ft.
Structural evaluation of asphalt pavements with fulldepth. Full depth reclamation is a pavement rehabilitation. Fdr is considered when the pavement is highly deteriorated or has deep cracking due to design deficiencies or an inadequate base. Processes edit old asphalt and base materials are pulverized using a specialized machine called a reclaimer. Fulldepth reclamation is an ideal solution for rebuilding weakened pavements for highways, parking lots, airfields and industrial sites.
Save time, money, and the environment on your next asphalt paving project with full depth pavement reclamation. Full depth reclamation of asphalt pavement is a rehabilitation method that involves recycling an existing asphalt pavement and its underlying layers into. Based on these criteria a proper design can be developed. Full depth reclamation fdr fdr consists of insitu pulverization with added stabilizers of a typically failed asphalt layer with a portion of the underlying base to create a new pavement base layer fdr is most commonly used to rebuild structurally failed asphalt pavements generally exhibiting fatigue cracking andor rutting. Apr 28, 2015 full depth reclamation pulverized flexible pavement section creating a uniform stabilized base further stabilization obtained through. For pavements with adequate structure design an hma layer to handle the predicted traffic loads. The submittal shall specify all the equipment and materials necessary to do the work. Concrete pavement engineering design, investigation. Performance evaluation the national academies press. Analysis of full depth reclamation trial sections in viginia. Guide to fulldepth reclamation fulldepth reclamation.266 515 760 934 100 580 392 826 482 740 570 76 501 1237 338 1343 214 782 461 315 431 905 416 1337 716 1274 1140 401 1147 1014 491 1359 805 14 1177 987 3 94 655 167 1031 768 1137 36 638 1097