Various kinds of pavements

Jul 3rd, 2016
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VARIOUS KINDS OFPAVEMENTSBy1What are Pavements?Pavements are superimposed layers of processedmaterials.Pavement types: Flexible (Asphalt Concrete) Rigid (Portland Cement Concrete) Special Purpose Pavements- Continuously Reinforced Concrete Pavements- Pervious Pavements2Functions of a PavementTo provide vehicle access between two pointsMore specific function for pavements: Access - Under all climatic conditions (drain) Durable - Sufficient structure for loads Safe - Adequate friction Smooth - Good ride quality, levelFactors Affecting Pavement DesignTraffic and Loading contact pressure, wheel load, axleconfiguration, moving loads and repetition of loadsMaterials of Construction elastic modulus, Poissons ratio,resilient modulusEnvironment temperature and precipitationDrainageReliabilityLife-Cycle Costs4Types of PavementsRigid Pavement transfers wheel loads to sub grade by theirflexural strengthFlexible Pavement wheel loads transferred through grain tograin contactSemi rigid pavements consist of a layer of flexible pavementover a rigid pavement.5Types of Flexible PavementConventional layered flexible pavement high quality material at top and low quality materials atbottomFull - depth asphalt pavement bituminous materials directly on soil sub gradeContained rock asphalt mats (CRAM) dense/open graded a

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