TY - CHAP
T1 - Rubber-Bitumen Interaction of Plant-Blended Rubberized Bitumen Prepared Under Various Blending Conditions
AU - Xu, Xiong
AU - Leng, Zhen
AU - Lan, Jingting
AU - Li, Rui
AU - Tan, Zhifei
AU - Sreeram, Anand
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2021/9
Y1 - 2021/9
N2 - Rubberized bitumen produced from waste tyre rubber has been widely used as a sustainable paving material around the world. However, different production conditions may lead to rubberized bitumens with different performances. This study aims to understand the mechanism of physicochemical interaction between rubber particles and virgin bitumen of plant-blended rubberized bitumen prepared under various blending conditions. To achieve this objective, samples of plant-blended rubberized bitumen prepared under four conditions were first collected, including blending at 170 °C for 1 h, and blending at 170 °C for 1 h followed by blending at 183 °C for 1, 3, and 5 h. Then the microstructure, viscosity, storage stability, and rheological properties of these samples were characterized. Microstructural results indicate main crosslinking structures of rubber particles remain stable and undamaged with the occurrence of chemical reactions including oxidation, decarboxylation, and devulcanization during the whole production period. The storage stability results state the rubberized binder exhibits no obvious phase separation after storage at 163 °C for 48 h, and becomes more stable as the blending time prolongs. The rheological results indicate the rubber-bitumen interaction is mainly composed of early-stage absorption and swelling of rubber particles, continuous emission of volatile bitumen fractions, and late-stage partial degradation of fully swollen rubber particles.
AB - Rubberized bitumen produced from waste tyre rubber has been widely used as a sustainable paving material around the world. However, different production conditions may lead to rubberized bitumens with different performances. This study aims to understand the mechanism of physicochemical interaction between rubber particles and virgin bitumen of plant-blended rubberized bitumen prepared under various blending conditions. To achieve this objective, samples of plant-blended rubberized bitumen prepared under four conditions were first collected, including blending at 170 °C for 1 h, and blending at 170 °C for 1 h followed by blending at 183 °C for 1, 3, and 5 h. Then the microstructure, viscosity, storage stability, and rheological properties of these samples were characterized. Microstructural results indicate main crosslinking structures of rubber particles remain stable and undamaged with the occurrence of chemical reactions including oxidation, decarboxylation, and devulcanization during the whole production period. The storage stability results state the rubberized binder exhibits no obvious phase separation after storage at 163 °C for 48 h, and becomes more stable as the blending time prolongs. The rheological results indicate the rubber-bitumen interaction is mainly composed of early-stage absorption and swelling of rubber particles, continuous emission of volatile bitumen fractions, and late-stage partial degradation of fully swollen rubber particles.
KW - Microstructure
KW - Plant production
KW - Rheological properties
KW - Rubber-bitumen interaction
KW - Rubberized bitumen
UR - http://www.scopus.com/inward/record.url?scp=85116453834&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-46455-4_208
DO - 10.1007/978-3-030-46455-4_208
M3 - Chapter in an edited book (as author)
AN - SCOPUS:85116453834
T3 - RILEM Bookseries
SP - 1641
EP - 1648
BT - RILEM Bookseries
PB - Springer Science and Business Media B.V.
ER -