Application of response surface methodology for optimization of polythene bag waste utilisation in road pavement using the dry process

Abstract

Disposal of waste materials including plastic waste has become a serious problem in Uganda and plastic wastes burnt for apparent disposal cause environmental pollution. These wastes are non-biodegradable in nature causing environmental pollution and hygiene problems. Research conducted at various institutions across the world indicates that plastic waste can be used in asphalting of roads. In this research, Plastic waste was coated around aggregate and mixed with bitumen to produce asphalt with plastic waste. The samples were subjected to various tests in the laboratory to determine their properties. The results of the research indicate that utilization of LDPE wastes is propitious in enhancing the the major properties of bitumen. 4% by the weight of total aggregate mix was found to be the optimum bitumen content to be added into aggregate mix and 5% by the weight of optimum bitumen content was found to be the optimum amount of LDPE waste content that should be mixed with bitumen. Keywords: Plastic waste, Bitumen, Aggregates, Plastic Asphalt mix