Abstract
The organic fraction derived from the differentiated collection of urban waste is mainly composed of fatty acids, medium molecular weight hydrocarbons and cellulose. This peculiar composition gave us insight into the possible use of organic waste to improve bitumen’s characteristics (possible antioxidant, regenerating and/ or viscosifying additive for road pavements). The issue of the disposal of organic waste is a global one and it’s constantly of increasing concern. This study looks to alleviate this problem by finding ways for this waste fraction to be utilized for the greater good- in this case, as an additive for bitumen binder in road pavements. The present study is focused on the use of waste as it is and waste treated by the FENTON process (treatment with ferrous sulphate and hydrogen peroxide solution). Dynamic Shear Rheology (DSR) and aging tests (Rolling Thin Film Oven Test, RTFOT) showed that two of the additives tested in this study proved effective: one can be utilised as a viscosifying agent and the other can be us ed as a filler.
Highlights
Waste management is a problem of growing concern globally and industrialization amongst other avenues of waste production has contributed significantly to the production of organic waste in recent years
If the bituminous mixture obtained does not meet these performance requirements, the bitumen binder needs to be modified with additives to improve its performance thereby improving the performance of the asphalt conglomerate as a whole [11,12,13]
The resulting samples were analysed by dynamic and stationary rheological measurements to understand the effects on the mechanical properties and on the structural and morphological variations induced by the single additives on the bitumen itself
Summary
Waste management is a problem of growing concern globally and industrialization amongst other avenues of waste production has contributed significantly to the production of organic waste in recent years. This has led to waste management problems as conventional waste disposal methods are not eco-friendly and are mostly inefficient [1]. It is a substance used to bind inorganic conglomerates in road pavement preparation This binder is mixed with the aggregates at high temperatures, and the presence of oxygen causes the bitumen to undergo strong oxidation which is a detrimental process reducing its mechanical characteristics
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