INVESTIGATION ON RUTTING PERFORMANCE OF NANOPOLYACRYLATE AND NATURAL RUBBER LATEX POLYMER MODIFIED ASPHALT BINDER MIXES

Abstract

This paper discussed a research carried out to study the rutting performance of dense graded (AC) and Stone Mastic Asphalt (SMA) pavement using nanocomposite polymer modified binder. The study also focused on the determination of optimum proportion of additive to be used in the mixing process. Two types of asphalt binder with penetration grade, PEN 80/100 and performance grade PG 76 were added with nanopolyacrylate and natural rubber latex as asphalt modifier. The nanocomposite polymer modified binder was prepared by adding 6 percent of Nanopolyacrylate (NC) to the asphalt binder. Both SMA and AC asphaltic mixtures conformed to the Marshall volumetric properties criteria which indicate that these mixtures are durable. The Asphalt Pavement Analyzer ( APA) rutting test was performed to determine the rutting performance of AC and SMA asphaltic mixtures showed that the rut values for SMA14 mix varies from 0.8 mm to 1.9 mm and AC14 mix varies from 1.7 mm to 2.3 mm respectively. This indicates the beneficial use of Nanocomposite polymer as modifier especially on SMA14 mix.