MOISTURE DAMAGE AND FATIGUE EVALUATION OF HOT MIX ASPHALT (HMA) CONTAINING RECLAIMED ASPHALT PAVEMENT (RAP) AND POLYTHENE BAGS (LDPE)
Journal Title: ASIAN JOURNAL OF NATURAL & APPLIED SCIENCES - Year 2017, Vol 6, Issue 2
Abstract
Transportation infrastructure plays a key role in the everyday life of social beings. For its design, highway agencies focus on appropriate and cost-effective design techniques, which depends upon the selection and proportion of binder and aggregate. These techniques include the use of Reclaimed Asphalt Pavement (RAP), which is being used for the last many years and provides the opportunity to conserve our natural resources by using waste materials for a useful purpose, meeting economic and environmental friendly needs of a country. Same is the case for Polythene Bags (LDPE: Low-density polyethylene), which is used extensively all over the world for carrying shopping items. These polythene bags can be used in HMA to lessen the bitumen quantity. This project is based on evaluating the performance of Hot Mix Asphalt (HMA) by adding different contents of RAP and LDPE as a replacement of bitumen. The RAP contents used were 10%, 20%, 30% and 40%. Performance testing was done after finding out the Optimum Bitumen Content (OBC), volumetric, stability and flow of RAP containing mixtures, by preparing two types of samples for each mentioned RAP percentages, one having 0% LDPE, while another with replaced 4% LDPE of OBC. Performance testing included Indirect Tensile Strength (ITS) Test for Moisture susceptibility and Indirect Tensile Fatigue Test (ITFT) for Fatigue performance of HMA using Universal Testing Machine (UTM). It was noted that 20% RAP with 4% LDPE as a replacement of bitumen can be used which would give better properties than control mix having only virgin materials with 0% LDPE. Cost estimation showed 21.8% reduction in cost by adding the recommended combination.
Authors and Affiliations
Arshad Hussain, Sami ud Din, M. Adam Khan, Fazal Haq
Keywords
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