Rational design method for bituminous pavements reinforced by geogrid |
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| Affiliation: | 1. Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50670-901, Recife, PE, Brazil;2. University of Lyon / ENTPE, Laboratory of Tribology and System Dynamics (LTDS) (UMR CNRS 5513), 3 Rue Maurice Audin, 69518, Vaulx-en-Velin, France;3. EIFFAGE Infrastructures Research & Innovation Department, Cedex, 8 Rue Du Dauphiné CS74005, 69964, Corbas, France;4. Afitexinov, Route Du Pont Du Diable, 38110, Cessieu, France;5. IMT Nord Europe, Institut Mines-Télécom, Univ. Lille, Centre for Materials and Processes, F-59000, Lille, France;1. Department of Civil Engineering, Karadeniz Technical University, 61080, Trabzon, Turkey;1. ARC Industrial Transformation Research Hub (ITRH) –SPARC Hub, Department of Civil Engineering, Monash University, Clayton, VIC, 3800, Australia;2. Department of Civil Engineering, Monash University, Clayton, VIC, 3800, Australia;1. Department of Civil Engineering, National Central University, Jhongli, Taiwan, ROC;2. Department of Mass Rapid Transit, Sinotech Engineering Consultant, Ltd, Taipei, Taiwan, ROC;1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China |
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| Abstract: | Geosynthetics have been a reinforced solution for pavement structures for more than 80 years and could be effective in extending its service life. There is a lack of consolidated design methods for pavement with this reinforcement. Therefore, this work aims at proposing a new rational design approach for reinforced structures based on the French design method. In this approach, the geogrid contribution was included by improving the fatigue and rutting properties of some layers, using coefficients named kmaj and kmaj_Z. Three hypotheses were considered concerning the condition of an old bituminous layer remaining from rehabilitation works. The first one considered this layer in healthy condition to simulate a new reinforced structure. The second one considered it as cracked and the third one as disintegrated to simulate the design for rehabilitation. Two placement positions and two geogrid-interface conditions (bonded and not bonded) were analyzed. The results indicated that the geogrid was most effective in a completely deteriorated structure and it should be placed in the lowest possible position in the bound layers. This method can be used for any geogrid position within the structure. Lastly, the reinforcement by geogrid allows a reduction of the thickness of the layer above it. |
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| Keywords: | Geogrid Reinforcement Design method Pavement Bituminous mixtures Subject classification codes |
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