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This research project deals with an economic study for construction and repair of flexible pavement reinforced with Geosynthetics in Thailand. The economic model is studied using the financial model, Net Present Value (NPV) and Internal Rate of Return (IRR) by the discounted cash flow technique at a discount rate of 12% (according to the government’s investment policy). The benefit-cost-ratio (B/C) is then investigated for the use of Geosynthetics as the repair materials and/or overlays. The result of the research could be served as construction and/or repair of flexible pavement information for repair and maintenance programs in Thailand.
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