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Rheological and Morphological Characterization of modified bitumen with Cup Lump Rubber

Journal of Renewable Materials 2023年第5期11卷 2433-2451页

作者： Mohammed Albuaymi Suleiman Abdulrahman Fayez Alanazi Hani Alanazi Musa Adamu Department of Civil and Environmental Engineering College of EngineeringMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Civil Engineering Kebbi State University of Science and TechnologyAlieroKebbiNigeria School of Civil Engineering Universiti Teknologi MalaysiaJohor Bahru81310Malaysia Department of Civil Engineering College of EngineeringJouf UniversitySakaka72388Saudi Arabia Engineering Management Department College of EngineeringPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Civil Engineering Bayero UniversityKanoPMB 3011Nigeria

Pure bitumen is not suitable for heavy traffic loads;hence modifiers are used to improve the bitumen ***,cup lump rubber(CLR)has become a preferred modifier due to its outstanding performance and less ***,little is known about the interactions between CLR and ***,this study investigates the behavior of bitumen with *** percentages of CLR(2.5%,5.0%,7.5%,and 10.0%by weight of bitumen)were used to modify conventional 60/70 penetration grade *** modified bitumen was evaluated through different laboratory testing such as dynamic shear rheometer,rotational viscosity,softening point,bending beam rheometer,ductility,and elastic *** testing results show that the addition of CLR increased the bitumen’s rutting resistance by 3 PG grades at high *** low pavement temperatures,the cup lump rubber modified bitumen(CMB)can withstand up to−34℃.Fourier Transform Infrared(FTIR)analysis shows that the Aromaticity index at 1600 cm^(−1) rose as the CLR percentage increased,indicating the formation of a binder with a compact *** is expected to improve the elasticity of bitumen throughπ-π*** Force Microscopy(AFM)results showed the Catana phase increased in size and quantity at 5.0%and 7.5%CLR *** contact angle measurement revealed that the binders are hydrophobic and tend to repel the dropped water on the bitumen surface.

关键词： Cup lump rubber polymer modified bitumen hydrophobicity natural rubber

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