Abstract
Abstract The procedures for design and reinforcement projects regarding flexible pavements available in Brazil are mostly based on empirical models developed from studies carried out in specific localities, and therefore, should only be used in cases where equivalent climatic and traffic conditions are observed. The national highway agencies in partnership with universities and research centers have been working to change this scenario through the development of a mechanistic-empirical method that is more compatible with the Brazilian geographic and technical-scientific realities. The first outcome of this task force is the computer program MeDiNa, which is still under assessment. In this present study, the new flexible pavement software in Brazil (MeDiNa) was used by the Federal University of Juiz de Fora to calculate the overlay asphalt of its the ring road, aiming to recover its functional proprieties. This pavement was evaluated functionally by Computerized Continuous Visual Survey (CCVS) and tests of longitudinal cracks, and structurally by survey deflection measurements (FWD) and shaft sinking. With the data collected from the structural evaluation, the homogeneous segmentation of the stretch and the back-calculation of the data was carried out, aimed at the acquisition of needed parameters for the calculation. After the appropriate design, it was concluded that the best solution for the overlay is resurfacing along its entire length, with the use of the project’s asphalt mixture with single thickness of 5.0 cm, observing the application of the anti-reflective cracking layer in some stretches.
Highlights
In a transport infrastructure system, the pavement is regarded to be the most important component, both on financial and operational issues, meaning a heritage, whose management is crucial to the total cost reduction
CA% in the project period end 15.6% 19.0% 19.0% 18.2%. With these three incurred simulations, it was observed that the best solution of overlay for the UFJF ring road flexible pavement is the execution of a resurfacing with a layer of unique thickness of 5.0 cm, besides the application of a layer to reduce propagation of cracks in the stretches corresponding to segments 02, 04, 06 and 08
A research was carried out regarding a method of flexible pavement maintenance, known as overlay, which consists of the implementation of a new asphalt mixture over the existing surface, aiming at the re-establishment of certain functional properties, as well prevention of future damages
Summary
In a transport infrastructure system, the pavement is regarded to be the most important component, both on financial and operational issues, meaning a heritage, whose management is crucial to the total cost reduction. It is acceptable to state that a pavement management system is fundamental for the routine monitoring of their functional and structural conditions This process, influences the maintenance and rehabilitation direct costs, and the other fractions of the total cost, such as operating costs of vehicles, accidents, disruption of traffic, etc. The maintenance of a pavement includes all operations which modifies, directly or indirectly, the actual pavement condition The purpose of this practice can be either the functional return of the pavement characteristics, or the prevention of damage to its structural components, ensuring an extension of its life-cycle. This method strives for theoretical analysis for pavement mechanics, and becomes independent of the empirical parameters of materials, it requires calibrations with experimental data
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