RT Journal Article
SR Electronic
A1 Najfabadi, Sajad Chavoshi
A1 Khabiri, Mohammad Mehdi
A1 Sanij, Hamed Khani
T1 Investigating the Characteristics of Modified Bitumen with Polyphosphoric Acid Polymers and Recycled Rubber
JF Communications - Scientific Letters of the University of Zilina
YR 2024
VO 26
IS 4
SP D109
OP D121
DO 10.26552/com.C.2024.050
UL https://komunikacie.uniza.sk/artkey/csl-202404-0006.php
AB 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.