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Performance Assessment of Anti-stripping Agents and Polypropylene Fibre on Stripping of Crumb Rubber Modified Bitumen
The bonding between bitumen, aggregates, and mineral filler is crucial for maintaining the durability of flexible pavements. Unfortunately, this bonding can be compromised by a process known as stripping, which weakens the internal resistance of the pavements and exacerbates various types of underlying damage. To address this issue, researchers have explored the use of different additives to enhance the moisture resistance of flexible pavements. This study focused on evaluating the effectiveness of three liquid anti-stripping agents (ASAs)—Fixtone-360, Wetbond-SP, and Wetbond-S—at varying dosages. Additionally, the performance of 6 mm-long polypropylene fibers in reducing stripping was also assessed. The evaluation of stripping value involved subjecting crumb rubber modified bitumen-coated aggregates to boiling conditions using the Texas boiling test, and visually inspecting the remaining percentage of the coated area. The study’s findings indicate that all three anti-stripping agents successfully reduced the stripping value of the bitumen-coated aggregate mix, even before compaction. Among them, Wetbond-S at a dosage of 0.04% exhibited the greatest reduction in stripping, both when used individually and in combination with polypropylene fibers, achieving reductions of 88% and 92% respectively. However, the usage of Wetbond-S at a dosage of 0.06% also yielded comparable results.
Performance Assessment of Anti-stripping Agents and Polypropylene Fibre on Stripping of Crumb Rubber Modified Bitumen
The bonding between bitumen, aggregates, and mineral filler is crucial for maintaining the durability of flexible pavements. Unfortunately, this bonding can be compromised by a process known as stripping, which weakens the internal resistance of the pavements and exacerbates various types of underlying damage. To address this issue, researchers have explored the use of different additives to enhance the moisture resistance of flexible pavements. This study focused on evaluating the effectiveness of three liquid anti-stripping agents (ASAs)—Fixtone-360, Wetbond-SP, and Wetbond-S—at varying dosages. Additionally, the performance of 6 mm-long polypropylene fibers in reducing stripping was also assessed. The evaluation of stripping value involved subjecting crumb rubber modified bitumen-coated aggregates to boiling conditions using the Texas boiling test, and visually inspecting the remaining percentage of the coated area. The study’s findings indicate that all three anti-stripping agents successfully reduced the stripping value of the bitumen-coated aggregate mix, even before compaction. Among them, Wetbond-S at a dosage of 0.04% exhibited the greatest reduction in stripping, both when used individually and in combination with polypropylene fibers, achieving reductions of 88% and 92% respectively. However, the usage of Wetbond-S at a dosage of 0.06% also yielded comparable results.
Performance Assessment of Anti-stripping Agents and Polypropylene Fibre on Stripping of Crumb Rubber Modified Bitumen
Lecture Notes in Civil Engineering
Nehdi, Moncef (editor) / Rahman, Rahimi A. (editor) / Davis, Robin P. (editor) / Antony, Jiji (editor) / Kavitha, P. E. (editor) / Jawahar Saud, S. (editor) / Jalota, Samrity (author) / Suthar, Manju (author)
International Conference on Structural Engineering and Construction Management ; 2024 ; Angamaly, India
2024-12-29
15 pages
Article/Chapter (Book)
Electronic Resource
English
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