2D ANALYSIS OF STRESSES AND DISPLACEMENTS OF ROLLER COMPACTED CONCRETE PAVEMENTS (RCCP) FOR LOW VOLUME ROADS UNDER VEHICULAR LOADING

P.Vineela, S.Krishna Rao, B.Panduranga Rao, V.Ramesh

Abstract: The American Concrete Institute (ACI) 116R defines RCC as “Concrete compacted by roller compaction; concrete that in its unhardened state will support a roller while being compacted”. RCC as a pavement material has been gaining acceptance over the past years. RCC can combat the problems often encountered with flexible bituminous pavements. RCC is the commercial name used for concrete placed with conventional hot mix bituminous paving equipment then compacted with vibratory rollers. This early stiffness makes the compaction process of RCC a feasible construction method and therefore eliminates the need for forms, finishing, dowels and steel reinforcement. The main objective of pavement design is to calculate the optimal thickness of different structural layers. In the design of rigid pavements, it is important to determine the thickness of slab in case of rigid slab taking most of the load carrying capacity. Roller Compacted Concrete Pavement belongs to the family of rigid pavements. Therefore the methods used for jointed plain concrete pavements are used for analyzing and designing of Roller Compacted Concrete Pavement. These methods primarily depend on “WESTERGAARD’s” analytical solution, which determines the mechanical response of a concrete slab under vehicular loading. Analysis of rigid pavements consists of determination of stresses, strains and displacements in a slab induced by vehicular and/or environmental loading. The model pavement will be analyzed under a tire load of 30kN with tire pressure of 0.5N/mm2 , tire load of 51kN with a tire pressure of 0.7N/mm2 , tire load of 65kN with a tire pressure of 0.74N/mm2 ; applied at three different locations namely, the pavement center, the pavement corner and the pavement edge using ALIZE, IAONNIDES and PORTLAND CEMENT ASSOCIATION (PCA) equations. For the applied tire load relative stresses and displacements will be calculated at three different locations. IRC: SP-62-2004 guidelines have been followed.

Keywords: Wheel Load, Roller Compacted Concrete Pavement, Tire Pressure, Modulus of Sub grade Reaction

DOI: https://doi.org/10.15623/ijret.2015.0413005