Dosage and Mixing-Time Optimization of Polymer Blending with Bitumen  through Fluorescent Microscopy

Kabir, Shahriar Bin

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dc.contributor.author	Kabir, Shahriar Bin
dc.date.accessioned	2025-03-14T06:30:35Z
dc.date.available	2025-03-14T06:30:35Z
dc.date.issued	2024-05-24
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Influence of morphology on high-temperature rheological properties of bitumen modified with styrene-butadiene-styrene (SBS) copolymer. Frontiers of Structural and Civil Engineering, 15(3), 806-819.	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/2407
dc.description	Supervised by Dr. Nazmus Sakib, Associate Professor, This thesis is submitted in partial fulfillment of the requirement for the degree of Master of Science in Civil and Environmental Engineering (CEE) , 2024	en_US
dc.description.abstract	Polymer modified bitumen (PMB) is a widely popular flexible pavement binder with capabilities such as high rutting resistance and excellent extreme weather performance. One of the most common polymers for PMB is styrene-butadiene-styrene (SBS) which is mixed with bitumen in 3-8% w/w in presence of a cross-linker (generally sulfur based). SBS absorbs lighter part of bitumen (aromatics) and become fluorescent which can be seen under a fluorescent microscope and evaluated for PMB network quality. In this study, elastomeric polymer SBS “A” was mixed at different dosage (2%-6% w/w) and for different durations under high shear mixer (1 hour). After addition of cross-linker, low speed mixing was applied for different durations (0.5hr to 6 hours). In each case, sampling was done at 0.5-1hr interval. Softening point test and microscopy was done on each sample. Microscopy images were further processed using ImageJ for a better understanding of particle size, particle distribution, and interlinks. A general correlation between the fluorescent microscopy image parameters and softening point was observed. However, it was noted that correlation coefficients were different for different SBS. Despite lack of universal correlation, the study shows that the image processing can indicate optimized dosage and mixing time for a given set of bitumen and SBS. Using microscopy to identify optimized blending state will reduce time and resource requirement at PMB formulation process.	en_US
dc.language.iso	en	en_US
dc.publisher	Department of Civil and Environmental Engineering(CEE), Islamic University of Technology(IUT), Board Bazar, Gazipur-1704, Bangladesh	en_US
dc.subject	Polymer Modified Bitumen (PMB), Elastomeric Polymer, Styrene Butadiene Styrene (SBS), Polymer Blending, Dosage, Mixing Time, Fluorescent Microscopic Image,	en_US
dc.title	Dosage and Mixing-Time Optimization of Polymer Blending with Bitumen through Fluorescent Microscopy	en_US
dc.type	Thesis	en_US