The effect of gamma-irradiated recycled polyolefins as asphalt binder modifiers
Source abstract
Abstract
The current study evaluated the potential effects on the rheological properties of an asphalt binder modified with two recycled postconsumer polyolefins, polyethylene (PE) and polypropylene (PP), both with and without exposure to gamma-ray (γ-ray) irradiation, putting out a procedure that ensures benefits concerning the behavior and performance of asphalt pavements. The chosen analytical methods intend to investigate: the polyolefins’ chemical and physicochemical properties; the asphalt binders’ linear viscoelastic behaviour and damage characteristics; and the high-temperature storage stability. The results demonstrated: significant changes in the molecular structure of irradiated polyolefins, as well as the presence of contaminants in one of the recycled plastics; improvements in the rheological behaviour of the modified binders, showing better results performed after irradiated-polyolefins addition, with gains in rutting and fatigue cracking resistance; high separation tendency of polyolefins from asphalt binder matrix was observed, even for γ-ray exposure polymers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Polymer crystallization and properties · Polymer Nanocomposites and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of São Paulo
Nuclear and Energy Research Institute (IPEN), University of São Paulo
Funding
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior · Fundação de Amparo à Pesquisa do Estado de São Paulo
References (82)
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