CURRENT PERPETUAL PAVEMENT EFFORTS IN INDIA - A CASE STUDY AND DESIGN WITH COMPARISON OF DIFFERENT PAVEMENT LAYER OPTIONS IN PERPETUAL PAVEMENT

The construction of perpetual pavement has just recently started in India, and the design limitations of tensile strain at the base of the asphalt and compressive strain at the top of the subgrade are checked for 80 and 200 micro-strains, respectively. With SMA – 50 mm, DBM – 250 mm, WMM – 150 mm, GSB – 200 mm, and Subgrade – 500 mm pavement layers, the Delhi Vadodara Expressway Project (8 lanes divided carriageway) is constructed in the country’s first perpetual pavement. As it is seen that the proposed perpetual pavement crust in India is of higher construction cost due to use of conventional pavement layers. Hence, this study identifies the cost-effective alternative crust for perpetual pavement. In India the road transportation has gradually increased over the years with improvement in connectivity between cities, towns and villages in the country. Considering the financial impact on Nation the Ministry of Road Transport & Highways has published the circular vide MoRT&H (GOI) RW/NH-33044/18/2020-S&R(P&B) Dated: 14th Dec 2020 regarding cost effective new / alternative Material and Technology in highway construction to reduce construction cost. However, this study deals with to find out the alternate option for the Perpetual Pavement versus current implementation in India for upcoming Expressway / Highway in India.