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Use of reclaimed asphalt pavements in hot mix asphalt mixtures has evolved into a regular practice

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Use of reclaimed asphalt pavements in hot mix asphalt mixtures has evolved into a regular practice in many countries around the world. Use of these materials in the past has proved to be economical and environmentally sound. Incorporating RAP in virgin materials has been favored over virgin materials in the light of the increasing cost of asphalt, scarcity of quality aggregate, scarcity of asphalt and ‘pressuring need to preserve the environment. The literature survey contexts that use of reclaimed asphalt pavement is effective in improving the performance which is equal to or better than the virgin mixtures. Unfortunately, asphalt pavement recycling is yet to take off in India despite the current ambitious road building program underway. …show more content…

Only 50% of the roads are paved, even the paved length has inadequate design standards. The current state of our nation’s transportation infrastructure is inadequate, and many state and city municipalities do not have the funds to rehabilitate their road networks to improve them to an acceptable level. National Highways Authority of India has prepared plans involving an outlay of Rs. 2,20,000 crores under National Highways Development Program (NHDP) and 10,000 km of expressways at a cost of Rs 1,00,000 crores are being planned in order to develop the road infrastructure and to boost the economy in India. The eleventh plan investment in roads and bridges is about Rs 2, 78,658 crores which is about 13.57 % of total outlay.
The Vision 2020 targets the development of a core network of 40000 kms to serve its industrial, agriculture and tourism industries. In an effort to address the increasing traffic intensities and the persistent regional disparities in the accessibility to good quality roads, the vision targets increasing the road density from the current 1.09 km per sq km to 1.50 km per sq km and up gradation of existing road network to increase the share of roads with carriage width of 2 lane and above from the current 10.32% to 55%. These mega road modernization exposes challenges of various concerns pertaining to depletion of resources like good soil and aggregates, long lead to get good quality aggregates and increase in fuel consumption etc,.

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