RECYCLED ASPHALT PAVEMENT USING WASTE VEGETABLE OIL AS REJUVENATOR

HIGHWAY ENGINEERING

As the cost of asphalt binder is rising and the budgets in hand are limited thus maximum use of recycled asphalt is the need of the hour. While Industries all over the world are moving towards sustainable practices, we should also aim for the same. Many industries are looking only to develop hot asphalt mixes as recycle with only 40% RAP content; this research aims to take it to 100%. The main drawback of using 100% recycling is the unknowing of properties of 100% RAP pavements and lack of knowledge for selection of materials and mix design. The aim of this research is to critically examine the idea of 100% recycling of asphalt, determine whether such mixtures can perform at par with regular asphalt mixes. A mix design approach is presented based on performance which reduces the emission also cuts down cost of material and have a positive environmental impact. We have used Marshall Stability and flow test for asphaltic mix. Validation of this method is based on laboratory performance of 100% old asphalt modified by waste vegetable oil as rejuvenator, which restores the chemical and physical properties of 100% RAP to perform as equal to conventional asphalt mixes. After analysis, we have found that 12% additions of rejuvenator with the addition of just 0.25% of bitumen (VG-30) in old asphalt have satisfied the required Marshall Stability and flow value. Recycled asphalt pavement using waste vegetable oil as rejuvenator production has enabled material related cost savings of 76.52 % compared to conventional asphalt pavement mix.

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