State of art for alternative materials for flexible pavements

Abstract

MoRTandH claims that a total of 10,855 kms of national highways was constructed in FY 2018-2019, highest ever in a single year and projects combining to 52,000 kms are in progress in the current year. CRISIL forecasts that NHAI will be awarding tenders of 4,000-4,300 kms per year between the fiscal years 2020-2024. So, it can be established that road and highway development in India is happening faster than ever before. All this development will lead to greater demand in materials and having alternate recycled materials can be a solution to fulfill those demands quickly, efficiently and cost economically. This research focusses on studying potential alternative materials for flexible pavements by analyzing the existing research of the past 10 years and establish a list of potential materials which can be used as an alternative. On studying several alternate materials had good potential, ranging from waste plastic, waste foundry sand, copper slag, etc. to materials like waste cooking oil. The most popular of those were, waste plastic, waste rubber, reclaimed asphalt and copper slag. Further analysis included to verify with any kind of specification, specified for use of such materials and have a conclusion on how these materials can be adopted as pavement materials.