Browsing by Author "Thenoux, G."
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- ItemBearing capacity evaluation of rubblized concrete pavements(CONSEJO SUPERIOR INVESTIGACIONES CIENTIFICAS-CSIC, 2009) Thenoux, G.; Gonzalez, M.The paper presents the findings of a research work performed on a real scale concrete pavement project where Rubblizing technology was used for its structural rehabilitation. Rubblizing may be defined as a fracture technique in which a concrete pavement slab is transformed in a granular base with a very high Modulus. This technique, fractures the concrete slab in angular pieces by using a concentrated dynamic load of low amplitude and high frequency. The research work was based on field study on the rehabilitation of 5 km motorway. The structural evaluations where made, before, during and after one year construction. Measurements and site evaluation where made by using DCP, Light Weight Deflectometer and FWD (on top of asphalt layer) and excavating inside pits. The structural capacity of the Rubblized layer was evaluated through theoretical analysis. Because of the anisotropic properties of the Rubblized layer the results are presented using AASHTO structural layer coefficient. The structural layer coefficients recommended are between the range of 0.25 and 0.30 for concrete slabs with thickness grater than 220 mm.
- ItemTechnical assessment model for the performance of flexible pavement maintenance(PONTIFICIA UNIV CATOLICA CHILE, ESCUELA CONSTRUCCION CIVIL, 2010) Vera, I; Thenoux, G.; Solminihac, H. D.; Echaveguren, T.Assessment of maintenance strategies is a key aspect in pavement management. This is done through such models as HDM-4 at network level. Calibrations at project level however are not always available for maintenance plans to be accurately made. This paper proposes an alternative model for the technical assessment of pavements, allowing conservation plans (assessment of the ex-before type) to be compared and also the performance of already executed maintenance works (ex-after type assessment). The model considers forecasts of traffic stress, roughness progression through IRI and the effect of maintenance activities on the IRI. Models were calibrated at the level of projects using data from 2,000 200-hundred meter sections of asphalt pavements of the Chilean road network. Each test section was grouped considering weather, traffic level, type of vehicles and load condition. An aggregated performance index is also proposed to measure the effectiveness of conservation plans compared to its base condition. This model allows measuring the performance of maintenance plans according to the type of pavement and optimizing the conservation plan according to the history of pavements.