Analysis of Flexible Pavements using IIT Pave

: The traffic pattern has changed since then and so has the technology. The volume of tandem, tridem and multi-axle vehicles has increased manifold and heavier axle loads are common. Since pavements are constructed as per the standards and specifications of design, which may not serve for the design period efficiently, safely, and economically due to early deterioration of materials with different properties. Due to environmental concerns as well as legal restrictions on quarrying, the focus has shifted from large scale use of conventional aggregates to use of local, recycled and engineered marginal aggregates in construction. It is generally known that failure of asphalt pavement is due to fatigue cracking and rutting deformation, caused by excessive horizontal tensile strain at the bottom of the bituminous layer and vertical compressive strain on top of the subgrade.  This presented study aim at expanding the scope of pavement design by including alternate materials like cementitious and reclaimed asphalt materials, and subjecting them to analysis using the software IITPAVE. In this study a road stretch is selected around Bangalore and engineering properties of subgrade soil has been studied. The different pavement composition materials like Cementitious Base and Cementitious Sub-base of aggregate interlayer for crack relief. Cementitious base and sub-base with SAMI at the interface of base and the bituminous layer.Foamed bitumen/bitumen emulsion treated RAP or fresh aggregates Cementitious sub-base has been designed, analyzed and compared with the conventional granular base and granular sub base. The use of different composition materials in pavement structure improves serviceability based in comparison with conventional granular base and granular sub-base. Among all the composition the cemented base and sub base with SAMI gives better serviceability because of substantial reduction in strains, thickness and cost effective compared to other design. Hence it can be recommended for stretch selected for studies.