Utilization of Waste Polymer (Rubber, Plastic) To Enhance the Strength of Asphalt Aggregate in Flexible Pavement
Keywords:
Waste Polymer, Asphalt, Flexible Pavement, Rubber, PlasticAbstract
Globally, sustainability is indeed an urgent necessity in the construction sector, and the use of waste products in road building is becoming more common recommended in order to lessen the environmental effect. A great variety of novel materials and techniques have been developed in the highway infrastructure to establish their feasibility for pavement design, construction, and maintenance. Plastics and rubbers being two examples. The amount of plastic garbage in landfill is growing as the population grows and lifestyles change. Similarly, most tire’s, particularly those used in automobiles, are made of synthetic rubber. The management of either is a severe issue. At the same time, the growing number of cars stresses the need for roads of higher quality and engineering design. This plastic & rubber can be utilized to partially replace conventional materials in order to improve desirable mechanical properties for a certain road mix. In this study a comparison is made between polythene and crumb rubber used to modify bituminous mixes. The percentage of bitumen is varied from 3,3.25,3.5,3.75,4 and 4.25 percent and the quantity of polythene and crumb rubber is varied in the percentages of 7.5,10,12.5 and 15 percent. The marshall stability procedure was used to prepare the specimens and stability values flow value, air void and VMA was found for the specimens. The optimum value of marshall stability was obtained at 4.25% bitumen content and 10% polythene or crumb rubber percentages.The value of Marshall stability was more for polythene modified bituminous mix. However, the flow values were grater for crumb bituminous mix. From the results it was concluded that polythene is a better modifier compared with crumb rubber.
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