Surfaces and Guideways

Surfaces and Guideways Introduction Basic Components Structural Design of Pavements Portland Cement Concrete Design Asphalt Concrete Pavement Design THE END Thank you Surface - the term surface refers to Roadway pavement which includes Portland Cement concrete, treated soil (gravel or other aggregate materials) and Asphalt concrete Guideway - A track along which Automated Transit Vehicles are guided. Guideway include monorails, concrete guideway for rubber tired vehicles and conventional duo-rail steel-on-steel railroad track Surface Course - also known as the pavement. It is the material laid over the Base Course consisting of Asphalt Concrete or Portland Cement Concrete. Base Course - is the material laid on top of the sub grade consisting of crushed stone or gravel.They may be stabilized by means of lime, Portland Cement, or Asphalt Sub-grade or Sub-base - is the earth beneath the road, properly arranged and graded, compacted and stabilized. It is defined as the "supporting structure on which the pavement surface and its special under-courses rest" The design of pavements involves determination of the types and thickness of the various layers of material making up the pavement. The goal is to specify the most economical pavement which will perform satisfactorily over a designed life so that comparisons between the two require Total Life Cycle Cost Analysis The most common design for Portland cement concrete pavement is the AASHTO rigid pavement design method. Like AASHTO flexible pavement procedure, this method relates to soil conditions, traffic characteristics and pavement design characteristics to a performance index value expected at the end of the pavement life. Highway Pavements Components Life Cycle Analysis for Concrete Life Cycle Cost Analysis for Asphalt Result: Total Life Cycle of Concrete pavement VS Asphalt Concrete Design Considerations Portland Cement Vs Asphalt Concrete Portland Cement Concrete Portland Cement concrete pavement are considered to