Abstract
Utilization of waste plastic as a aggregate in bituminous mix results in weak bonding between the plastic and bitumen. This study reports on the feasibility of using plastic waste and chemical additives to improvise the performance and mechanical properties of bituminous mixtures. The selected recycled waste plastics were used as partial aggregate replacement in bituminous mix product. Strong oxidizing mixture of dichromate and sulphuric acid was used to treat the plastic, while the bitumen was treated with a cross linking agent, polyethylene mine. Three modified bituminous mixtures were prepared and the stiffness results were compared with the control bituminous mixture. It was observed that the stiffness increased by 10% for the chemically modified bituminous mixtures. This improvement is attributed to an increase in the bonding forces between the aggregates and the bitumen. Besides, a mechanism is proposed in order to explain the effect of the chemical additives on the increase in the stiffness of the bituminous mixture.
Highlights
Utilization of waste plastic as a aggregate in bituminous mix results in weak bonding between the plastic and bitumen
It is not economical to use understanding of the fundamental chemistry and physics of these materials as alternative aggregates unless their use these paving material components owing to the past reliance adds sufficient value to the bituminous product, so that the on tests which primarily use physical properties of bitumen cost of the materials can be justified
With the increasing usage of plastics in various the integrity of the pavement. This bonding must be sectors, the discharge of polymeric wastes is bound to create established at the initial stages of contact between the further greater environmental problems in the years to come. bitumen and the aggregate and must endure during the Attempts are still being made by various organizations and lifetime of the pavement
Summary
Utilization of waste plastic as a aggregate in bituminous mix results in weak bonding between the plastic and bitumen. Industries together with population growth has resulted in The bonding between bitumen and aggregate is of utmost enormous increase in production of various types of waste importance as it is the primary characteristic that influences materials. Among various types of Replacing the primary aggregates partially with additives, chemical anti-stripping agents are probably the recycled waste plastic has the benefits of reducing the most promising as reported by [11,12]. According to Waste Resources Action Program 2.8 Together to cause the de-bonding of bitumen from million tons of waste plastics is generated per annum in the aggregate These mechanisms are: UK [2].
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