Full depth reclamation using foamed asphalt pdf full depth reclamation using cement pdf pulverization. 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. Fdr removes pavement crack patterns and eliminates reflective cracking. There is an everincreasing backlog of rehabilitation needs with minimal resources. An 14 evaluation project was initiated by indot research and development to estimate the structural contribution and. Using the 4th power approximation, determine the total equivalent damage caused by this bus in terms of esals when. Methods in use are marshall, superpave, wirtgen wirtgen 2004, proctor aashto t99, modified proctor kim and labuz 2007, and unconfined compressive strengths. The process uses a machine called a reclaimer or pulverizer thats equipped with an 8footwide mandrel cutting wheel. Fulldepth reclamation is an ideal solution for rebuilding weakened pavements for highways, parking lots, airfields and industrial sites.
Full depth reclamation pulverized flexible pavement section creating a uniform stabilized base further stabilization obtained through. Full depth reclamation is a type of complete road reconstruction where the old pavement and base materials are not removed. Measure properties on caltrans full depth pavement reclamation with foamed asphalt projects to be built in the future. 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. Laboratory comparison of full depth reclamation stabilization. Chapter 9 full depth flexible pavement design chapter 9. 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. Fdr for asphalt pavement with cement as the stabilizer was used as the base course. Concrete pavement engineering design, investigation. Mix design structural pavement design construction manual traffic control plan owneragency requirements stabilizing agent. 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. To view the entire ac and the latest errata sheet, select the complete ac link below.
Based on these criteria a proper design can be developed. Learn how full depth reclamation restores the life of. 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. Fulldepth reclamation using portland cement southeast cement. A method of reconstructing a bituminoussurfaced pavement is provided. Full depth reclamation fdr with cement is a procedure where failed asphalt pavements are pulverized and reclaimed. Pavement design road surface strength of materials. Fulldepth reclamation, fdr, pavement, cementtreated base, ctb, cement stabilization, longterm performance, soilcement. Analysis of fulldepth reclamation trial sections in virginia. Sustainable pavement rehabilitation according to the 2017 asce infrastructure report card, our nations roadway infrastructure is in poor condition. Addition of aggregate addition of stabilizers liquid asphalt portland cement. The completed pavement is expected to last more than 20 years. 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. 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.
Performance evaluation the national academies press. Materials and mix design, construction methods and equipment, case histories and quality control quality assurance have been discussed for all recycling methods. Comparison of design thickness between the 1993 aashto. Construction inspection checklist full depth reclamation. 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. 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. Unconfined compressive strength of lime treated soils and aggregates. Guidelines for project selection, design, and construction. Apr 28, 2015 full depth reclamation pulverized flexible pavement section creating a uniform stabilized base further stabilization obtained through. Us7455476b2 method of reconstructing a bituminoussurfaced. Full depth reclamationrecycling fdr this rehabilitation procedure entails pulverizing the old pavement structure, blending in a stabilizing agent.
Full depth reclamation fdr is a flexible pavement recycling technique that has not. Full depth reclamation and stabilized full depth reclamation 1252016. Learn how full depth reclamation restores the life of pavement structures that have deep structural issues while avoiding highcost pavement reconstruction. Analysis of full depth reclamation trial sections in virginia brian k. Officials aashto procedure for pavement design, for example, uses a structural layer coefficient to model base. Other indications that a road could use fdr are frequent transverse and lateral cracking, reflective cracking, severe rutting. Inplace recycling pulverizing or full depth reclamation. This method includes evaluating the pavement to determine if it is an appropriate candidate for full depth reclamation.
Emulsified asphalts, fillers, virgin aggregates or recycled asphalt pavements rap can be added to maximize the effectiveness of the system. The following standards are from ac 150537010h, standards for specifying construction of airports. 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. 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. Comparison of design thickness between the 1993 aashto guide and mepdg for full depth reclamation pavement. This participants reference book was developed to support a 2day workshop on pavement recycling guidelines for state and local governments. The fullfactorial experimental design included five rap. Full depth reclamation of asphalt pavement is a rehabilitation method that involves recycling an existing asphalt pavement and its underlying layers into. Materials division business virginia department of. Design of fulldepth reclamation with portland cement fdrpc. Fulldepth pavement reclamation with foamed asphalt in california. 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.
Keywords lcca, life cycle cost analysis, rehabilitation costs, heater remixing, heater scarifying, cold in. Learn about fulldepth reclamation of pavement with lindsi. Txdot specifications 2014 english special specifications. 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. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. Using the materials properties measured in the lab and the.
Material properties of cold inplace recycled and fulldepth. Full depth reclamation is a pavement rehabilitation. Mix design for fulldepth reclaimed asphalt pavement with. Structural evaluation of asphalt pavements with fulldepth.
Guide to fulldepth reclamation fulldepth reclamation. 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. Full depth reclamationrecycling fdr this rehabilitation procedure entails pulverizing the old pavement structure, blending in a stabilizing agent, compacting, adding additional material, and resurfacing. 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.
Design of fulldepth reclamation with portland cement fdr. Best practices for full depth reclamation using asphalt emulsions background 5 mixture designs for fdr projects stabilized with emulsion are varied. A very popular reconstruction alternative is known as full depth reclamation fdr. 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. This 2016 asphalt pavement design guide has been prepared to assist readers in understanding asphalt mix pavement design, construction, and rehabilitation. 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. Comparing layer types for the use of pavementme for asphalt. Fdr conserves materials by reusing pavement components. 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. If a long section of thick asphalt is selected for reclamation, the asphalt layer can be partially milled and the rap. These limiting strain criteria find their full potential in the perpetual pavement design. Part 2 design a flexible pavement for this number of esals. A 2week notice to the engineerincharge and the regional.
These samples shall be used to establish the design rate of expanded asphalt as a. Save time, money, and the environment on your next asphalt paving project with full depth pavement reclamation. Material properties of cold inplace recycled and fulldepth reclamation asphalt concrete 2017. Full depth reclamation fdr is one of the three major types of asphalt recycling techniques. 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. Full depth recycling or full depth reclamation fdr, is a process that rebuilds worn out asphalt pavements by recycling the existing roadway. Pavement structural evaluation and design of fulldepth. 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.
In summary, full depth reclamation converts a wornout asphalt pavement into a stabilized base course. Processes edit old asphalt and base materials are pulverized using a specialized machine called a reclaimer. Carolina emulsion fdr mix design, the wirtgen foam fdr mix design, and the portland. One such technique that holds promise of providing this type of solution is full depth reclamation fdr. 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. 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 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 not a preservation strategy, full depth reclamation fdr is a proven alternative to traditional reconstruction.
Full depth reclamation is typically used on roads that have moderate to severe pavement distress and underlying base issues. Design full depth reclamation kandhal and mallick 1997. Hot inplace recycling was further broken into three categories. The submittal shall specify all the equipment and materials necessary to do the work. Old asphalt and base materials are pulverized using a specialized machine called a reclaimer. Section 7 of bulletin 27 bituminous concrete mixtures, design procedures and specifications for special bituminous mixtures. 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. 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. 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.
Fulldepth reclamation with cement is an engineered. Pavement design using fdr 2008 is the dividing line. Fulldepth pavement reclamation with foamed asphalt in. At 58 inches in diameter, the wheel has 256 tungsten carbide teeth in a staggered pattern. This cementstabilized base is then surfaced to provide a new, longlasting pavement structure. Best practices for fulldepth reclamation using asphalt emulsions background 5 mixture designs for fdr projects stabilized with emulsion are varied. 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. Fulldepth reclamation bases contain a pulverized asphalt pavement mixed together with all or part of.
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. For pavements with adequate structure design an hma layer to handle the predicted traffic loads. Quality base material produced using full depth reclamation. 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. Pavement structural evaluation and design of full depth reclamation fdr pavement by tommy nantung, ph. Evaluation of fulldepth reclamation on strength and. Trbs national cooperative highway research program nchrp research report 863. One of the faster pavement construction techniques is fdr fulldepth reclamation. Eb 15025 page 1 of 18 geotechnical engineering manual.
Rehabilitating an old pavement by pulverizing and stabilizing the existing pavement. Full depth recycling or full depth reclamation fdr, is a process that rebuilds worn out asphalt pavements by recycling the existing roadway processes. Best practices for fulldepth reclamation using asphalt emulsions. The standard axle weights for a standingroomonly loaded metro articulated bus 60 ft. Refer to guidelines and design process for full depth reclamation listed tn chapter 2. Carry out laboratory testing to identify specimen preparation and test methods, and develop information for mix design, structural design, and construction guidelines. Virginia experience past and present march 2, 2018 what is full depth reclamation fdr vdot experience outline virginia department of transportation. 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 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. 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. Best practices for fulldepth reclamation using asphalt. Full depth reclamation using asphalt emulsion roadmixed for project 047901019 in reeves county. Research scientist introduction pavement recycling has become an increasingly common technology to restore the. Governments participants reference book, federal highway.
Fulldepth pavement reclamation, however, sidesteps many of these complications. The process uses a machine called a reclaimer or pulverizer that is equipped with an 8footwide mandrel cutting wheel. Evaluation of full depth reclamation on strength and durability of pavement base layers benjamin earl griggs department of civil and environmental engineering master of science the purpose of this research was to determine the effect of full depth reclamation fdr on the strength and durability of aggregate base layers in a coordinated approach. Full depth pavement reclamation, however, sidesteps many of these complications. Advantages of fulldepth pavement reclamation asphalt. Guide to fulldepth reclamation fdr with cement by david r. Full depth reclamation and stabilized full depth reclamation. Airport construction standards ac 150537010 airports. Fulldepth pavement reclamation with foamed asphalt. Quality asphalt pavement may be constructed in a wide range.
The objective of this part of the research is to develop a guideline document for pavement rehabilitation design using fulldepth reclamation. 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. This method provides a very economic alternative to conventional construction methods by reusing the existing pavement material. Fdr is an economical, inplace recycling alternative to road reconstruction. Aashto pavement thickness design guide when designing pavement thickness for flexible and rigid pavements, the following considerations should be used. 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. Fdr is considered when the pavement is highly deteriorated or has deep cracking due to design deficiencies or an inadequate base. Analysis of full depth reclamation trial sections in viginia. Fdr promotes the reuse of existing road materials and significantly reduces the use of.
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