ABSTRACT
In hot countries like India roads laid on agricultural zones and other water prone areas will be affected by severed pot holes created due to the water presence in the pavement. Due to the improper maintenance and limited fund causes deterioration of pavements. Various problems on the roads have been frequently observed on flexible pavements like: potholes, rutting, shoving etc. Literature review lighten up on solution of these problems by modification of bitumen. To lighten this process, several measures may be effective, such as, use of better quality materials like waste plastic, motor oil, crumb rubber. The grade of bitumen produced in India without admixtures are not able to cope up with the extreme weather conditions across…show more content… Although thermoplastic elastomers such as styrene-butadiene-styrene triblock copolymer (SBS) or its hydrogenated forms and plastomers such as ethylene-vinylacetate copolymer (EVA) are good bitumen modifiers, rubbers are preferred due to their lower prices. In fact, bitumen is supposed to keep its physical and rheological properties constant at different service temperatures and loading conditions and transforms itself to a low viscosity Newtonian fluid at mixing temperature (165ºC). This type of bitumen is called “ideal bitumen”. Constant rheological properties in a wide range of temperatures correspond to rubbery behaviour. It is concluded that the rubbers should be able to modify bitumen properties very well. Therefore, many types of rubbers were introduced in bitumen (PBR, SBR and its latex, ground tire rubber…show more content… Initially the effect of crumb rubber % is evaluated starting from 4% and increment is done by 2% and properties of bitumen mix is evaluated up to 10%. Results obtained from marshall stability is found that 8 % of crumb rubber gives better results in stability and within permissible limits defined by MORTH.
Secondly the effect of plastic % is evaluated starting from 4% and increment is done by 2% and properties of bitumen mix is evaluated up to 10%. Results obtained from marshall stability is found that 8 % of plastic gives better results in stability and within permissible limits defined by MORTH.
Thirdly the effect of waste motor oil percentage is evaluated starting from 4% and increment is done by 2% and properties of bitumen mix is evaluated up to 8%. Results obtained from marshall stability does not show improvement in stability. However, it is expected that comprehensive use of motor oil with rubber and plastic will improve the results
Finally variation of all modifiers are checked by conducting marshall stability test and it is found that Bitumen (5.5 %), Crumb Rubber (8%), Waste Plastic (6%) and Motor Oil (2%) gives highest stability and other properties values within the range given in