As to riders. Since FDR recycles existing materials,

Asthe state’s infrastructure ages, construction agencies at all levels are taskedwith maintaining and rehabilitating their infrastructure. As budgets are decreasing,construction costs are increasing; it is becoming costlier to completely removeand replace existing pavements. In Addison, as feasible construction practicescome to the beginning, facilities want to recapitalize their investments indecades-old pavements by reusing existing materials on site in a cost-efficientmanner. Sustainable engineering technologies in pavement rehabilitation, suchas full-depth reclamation (FDR), could be the solution for agencies in their huntto provide taxpayers with good -quality infrastructure while being good purserof public funds. Full-depth reclamation of asphalt pavement, is a reestablishmentmethod that involves recycling an existing asphalt pavement and its underlyinglayer(s) into a new base layer. Constructionof FDR has less impact on the locality than remove-and-replace construction methods.

Basically, completed portions of the FDR base can be opened almost immediatelyto local traffic as soon as the curing material is not affected. This is a mostlyfavors to urban areas where residential and commercial roadway access iscritical during construction. In addition to improved staging, reclaimingin-place materials reduces the overall construction schedule, helping tominimize inconvenience to riders.SinceFDR recycles existing materials, there is less truck traffic to haul awayexisting materials and import new materials to the construction site. Not onlydoes this improve safety and reduce energy consumption but it also has lessimpact on adjacent streets that may otherwise be damaged due to heavy equipmentduring construction. Anotherbenefit of FDR is that an existing roadway can be widened with a uniform basecompared with other widening methods that do not involve reclamation. Fulldepth reclamation can be used to widen roadways while at the same time blendingthe underlying poorer quality subgrades with the existing pavement and cementto produce a new uniform base layer. Agencies have been pleased with thesuccess of this method because they are able to expand their existing roadwaysat a fraction of the cost of alternative road construction methods.

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As reclamationcould eliminate labor costs, trucking and off-site processing fees, the practicewill drastically impact the project costs. Reliant on-site size and conditions,using full depth reclamation as opposed to removal and replacement couldgenerate a cost savings of over half cost around 50%. Despitethere are significant advantages to including FDR into a roadway rehabilitationproject, certain aspects of the roadway project must be considered. If thereare areas with drainage problems such as saturated subgrade or inadequatedrainage systems to divert water away from the pavement structure, FDR alonewill not solve this issue.

The project should include measures. Modernpulverizing equipment can exceed 18 inches in depth and, as with all pavementreconstruction methods, the elevation of existing utilities should be checkedand documented before selecting FDR as the restoration method. Full-depthreclamation is not the solution for all pavement distresses. We should considerthe condition of existing pavement and the reason for the distress. Forpavements with adequate subgrades and bases and existing asphalt pavement infair or better condition (minor surface cracking), the need for FDR is justifiedAs the state’s infrastructure ages, construction agencies at all levels aretasked with maintaining and rehabilitating their infrastructure.

As budgets aredecreasing, construction costs are increasing; it is becoming costlier tocompletely remove and replace existing pavements. In Addison, as feasibleconstruction practices come to the beginning, facilities want to recapitalizetheir investments in decades-old pavements by reusing existing materials onsite in a cost-efficient manner. Sustainable engineering technologies inpavement rehabilitation, such as full-depth reclamation (FDR), could be the solutionfor agencies in their hunt to provide taxpayers with good -qualityinfrastructure while being good purser of public funds. Full-depth reclamationof asphalt pavement, is a reestablishment method that involves recycling anexisting asphalt pavement and its underlying layer(s) into a new base layer. Constructionof FDR has less impact on the locality than remove-and-replace construction methods.Basically, completed portions of the FDR base can be opened almost immediatelyto local traffic as soon as the curing material is not affected. This is a mostlyfavors to urban areas where residential and commercial roadway access iscritical during construction. In addition to improved staging, reclaimingin-place materials reduces the overall construction schedule, helping tominimize inconvenience to riders.

SinceFDR recycles existing materials, there is less truck traffic to haul awayexisting materials and import new materials to the construction site. Not onlydoes this improve safety and reduce energy consumption but it also has lessimpact on adjacent streets that may otherwise be damaged due to heavy equipmentduring construction. Anotherbenefit of FDR is that an existing roadway can be widened with a uniform basecompared with other widening methods that do not involve reclamation. Fulldepth reclamation can be used to widen roadways while at the same time blendingthe underlying poorer quality subgrades with the existing pavement and cementto produce a new uniform base layer. Agencies have been pleased with thesuccess of this method because they are able to expand their existing roadwaysat a fraction of the cost of alternative road construction methods. As reclamationcould eliminate labor costs, trucking and off-site processing fees, the practicewill drastically impact the project costs.

Reliant on-site size and conditions,using full depth reclamation as opposed to removal and replacement couldgenerate a cost savings of over half cost around 50%. Despitethere are significant advantages to including FDR into a roadway rehabilitationproject, certain aspects of the roadway project must be considered. If thereare areas with drainage problems such as saturated subgrade or inadequatedrainage systems to divert water away from the pavement structure, FDR alonewill not solve this issue. The project should include measures. Modernpulverizing equipment can exceed 18 inches in depth and, as with all pavementreconstruction methods, the elevation of existing utilities should be checkedand documented before selecting FDR as the restoration method. Full-depthreclamation is not the solution for all pavement distresses. We should considerthe condition of existing pavement and the reason for the distress.

Forpavements with adequate subgrades and bases and existing asphalt pavement in fair or better condition (minorsurface cracking), the need for FDR is whenincreased structural capacity is needed to meet future loading conditions. Finally, we can conclude that,Like all reconstruction methods, the FDR process requires an engineeringpavement evaluation as a part of project selection, as well as implementationof established quality control practices during construction. Full-depth reclamation is a valuable and useful constructionmethod help to improve the condition of existing sites at a reasonable cost, anexpedited schedule, and a reduced impact to the environment as compared to fullsurface replacement.