| Summary: | Pavement of bituminous membranes technology has recenly been used in Indonesia in order to reduce the process of reflection cracking in new asphalt overlays. Thus, in an effort to establish design criteria for this technology, a simulation laboratory research was undertaken, to achieve a mechanical simulation of fatigue crack propagation in asphalt mixtures with geosynthetics reinforcement as a function of the number of load applications. A number of experiments were conducted using this model, including the testing of sand-asphalt beams with 2 kinds of geosynthetics reinforcement, with variation of load in dynamic loading and content of bitumen. Dynamic loading used standard load (0.9 ton) and maximum load (1.5 ton), using 1.7 Hz frequency, assuming the speed is 30 km/hour. Non-woven and woven geosynthetics were used for reinforcement of the beams. A servopulser testing machine was used for this purpose. The results show that the woven and non-woven geosynthetics can reduce the propagation of crack on flexible pavement. Woven geosynthetics materials can be applied as reinforcement better than non-woven ones, because they have different stress strain behaviours that depend on the composition and the processing of the materials. The flexible pavement structures always need optimum content of bitumen, even though the reinforcement geosynthetics were used.
Keywords : geosynthetics, flexible pavement, dynamic loading
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