Analysis and design of concrete pavements – Research Paper Example

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In 2007, the Australian Society for Concrete Pavements (ASCP) was formed with the primary goal of facilitating improvements in the design, quality and construction of concrete pavement in Australia particularly through research, technology, education and information transfer (AS/NZS 4456, 2005). Modern technological innovations and advancements have significantly enhanced the design of sustainable concrete pavements for highways, parking lots and streets based on particular soil conditions, environmental demands as well as the estimated traffic loads and pavement stresses. For example, advances in computer modeling have resulted in a number of applications that have particularly offered the possibility of including various new parameters in the design of concrete pavements (Choubane and Tia, 2005).

However, the optimization of the contemporary pavement systems requires long term and fatigue resistance designs that are also cost effective and ecologically sound. In this regard, understanding the behavior and characteristics of concrete is critically vital in the design and performance of concrete paved road surfaces. Fig 1: Concrete Pavement The two main types of concrete pavements in Australia include plain jointed concrete pavements and the reinforced jointed concrete pavements (Shackel, 1990). In plain jointed concrete pavements, a sufficient number of joints are usually used to control all the locations of potential shrinkage cracks in the pavements (Austroads, 1992).

This is particularly achieved through the use of longitudinal traverse joints that are normally constructed with well designed traverse joints. In this regard, any crack on the pavement is expected to occur at the joints not in any other part of the slabs. Although jointed plain concrete pavements do not normally contain steel reinforcement, deformed steel bars may be used at the longitudinal joints and smooth steel bars at the traverse joints.

Some plain concrete pavements use dowels to minimize faulting while others rely on aggregate interlocks to transfer loads across the joints and reduce faulting. On the other hand, reinforced concrete pavements are often reinforced with steel mesh and can be either constructed based on either continuous reinforced design or jointed reinforced designs (Shackel, 1990) In jointed reinforced concrete pavements the reinforced steel are used to hold together the intermediate cracks at each of the slab while continuous reinforced concrete pavements do not have any traverse contraction joints.


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Appendix A: Design and Construction Continuously Reinforced Concrete Pavement

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