Work

Investigating the Characteristics of Modified Bitumen with Polyphosphoric Acid Polymers and Recycled Rubber

Year: 2024

Type: article

Abstract: The impact of polyphosphoric acid (PPA) polymers and crumb rubber (CR) on bitumen's properties to enhance its performance was examined in this study. Laboratory samples were created with varying percentages of PPA (0.5 % to 2 %) and CR (6 % to 18 %) and subjected to extensive testing. Findings indicated that the combination of PPA and CR led to notable improvements in bitumen performance, including increased viscosity, softening point, elasticity, and recovery rates at elevated temperatures. Specifically, samples with 18 % CR and 1.0 % or 2.0 % PPA demonstrated exceptional rheological properties and strength. The optimal combination (18% CR and 1.0% PPA) resulted in a uniform structure, while the maximum CR content did not compromise bitumen integrity. Both additives effectively minimized temperature sensitivity and aging, enhancing the bitumen's performance class significantly.

Source: Communications - Scientific letters of the University of Zilina

DOI: 10.26552/com.c.2024.050

Authors: Sajad Chavoshi Najfabadi, Mohammad Mehdi Khabiri, Hamed Khani Sanij

Institution: Yazd University

Language: English

Topic: Asphalt Pavement Performance Evaluation

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: diamond

OpenAlex ID: W4401820895

FWCI:

Cites: 22

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Related to: 10