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Maintenance and Rehabilitation of Pavements
Published in Rajib B. Mallick, Tahar El-Korchi, Pavement Engineering, 2017
Rajib B. Mallick, Tahar El-Korchi
Full-depth reclamation has been defined as a recycling method where all of the asphalt pavement section and a predetermined amount of underlying materials are treated to produce a stabilized base course. Different types of additives, such as asphalt emulsions, and chemical agents, such as calcium chloride, Portland cement, fly ash, and lime, are added to obtain an improved base. The five main steps in this process are pulverization, introduction of additive, shaping of the mixed material, compaction, and application of a surface or a wearing course. If the in-place material is not sufficient to provide the desired depth of the treated base, new materials may be imported and included in the processing. This method of recycling is normally performed to a depth of 100–300 mm (4–12 in.). The major advantages and benefits of full-depth reclamation are as follows:
Recycling of bituminous materials
Published in Peter Domone, John Illston, Construction Materials, 2018
In full-depth reclamation, the existing pavement (usually all the surface and part of the base) is ripped and milled to a certain depth, which can extend up to 350 mm. The broken fragments are then mixed with a new binder, consisting of bitumen emulsion, foamed bitumen or soft bitumen to produce a stabilised base, and compacted. A new surface is then laid and compacted on the new recycled base (Kandhal and Mallick, 1997). Figure 32.3 provides an illustration of the process.
Recycling of bituminous materials
Published in Marios Soutsos, Peter Domone, Construction Materials, 2017
In full depth reclamation, the existing pavement (usually all the surface and a part of the base) is ripped and milled to a certain depth, which can extend up to 350 mm. The broken fragments are then mixed with a new binder, consisting of bitumen emulsion, foamed bitumen or soft bitumen to produce a stabilised base, and are compacted. A new surface is then laid and compacted on the new recycled base (Kandhal and Mallick, 1997). Figure 56.3 provides an illustration of the process.
Flexural strength, stiffness and fatigue of cement-treated mixtures of reclaimed asphalt pavement and lateritic soil
Published in Road Materials and Pavement Design, 2021
William Fedrigo, Washington Peres Núñez, Gabriel Grassioli Schreinert, Thaís Radünz Kleinert, Matheus Ferreira Matuella, Mario Alexander Castañeda López, Jorge Augusto Pereira Ceratti
Full-depth reclamation (or recycling) with portland cement (FDR-PC) is a technique that consists of in situ milling and mixing with cement the existing upper layers of a damaged pavement structure (mainly the asphalt wearing course and the base layer). The resulting mixture is then compacted to form a new layer that will increase the bearing capacity of the upgraded pavement (Katsakou & Kolias, 2007; Portland Cement Association [PCA], 2005). These recycled layers are considered as cement-treated materials and the design requirements in terms of material properties and layer thickness are mainly based on this assumption (Kolias, Katsakou, & Kaloidas, 2001). That is, although these recycled layers initially show little distress, they inherently exhibit fatigue deterioration under cyclic loading and may rapidly deteriorate once distress initiates. Therefore, fatigue failure usually is the main design criterion for the long-term performance of pavements with a cement-treated recycled layer (Jitsangiam, Nusit, Chummuneerat, Chindaprasirt, & Pichayapan, 2016; Sounthararajah, Bui, Nguyen, Jitsangiam, & Kodikara, 2018; Sounthararajah, Kodikara, Nguyen, & Bui, 2019).