A Review on Rubber Modified Asphalt Concrete Mix (RUMAC)

Abstract

The use of crumb rubber in road engineering as a reinforcement to the bituminous concrete acts as one of the main revalorization technique for this waste. This has not only prevented us from stockpiling of vast masses of wastes but has also abetted us in improving a lot of properties in the bituminous mixes. The main purpose of this study is to analyse the possible permanent deformation improvements, fatigue cracking improvements, stability improvements in the bituminous concrete mix by reinforcing it with the crumb rubber aggregates. For this purpose, various studies were analysed and the suggestions from the various researchers were presented. From the analysis of the different studies of the researchers it can easily be concluded that the introduction of the crumb rubber in the
form of aggregates in the bituminous concrete mixes has improved numerous properties of the blended mixes within the proportional limits. The tests used to evaluate the behaviour of bituminous mix was Marshal Stability test, Indirect tensile strength test and the permanent deformation test. The results from various studies shows that the addition of the crumb rubber retards the appearance of the cracks, ruts and improves the stability of the pavements at permissible proportions.