Kiara Seth
Independent Researcher
India
Abstract
This manuscript presents an investigation into the optimization of bituminou s mix design employing the Marshall Stability method, aligned with technologies and practices available up to 2015. The study aims to identify the optimum binder content that balances stability and durability for flexible pavement layers. Laboratory experiments were conducted on bituminous concrete specimens with varying binder contents (4.0 %, 4.5 %, 5.0 %, 5.5 %, 6.0 %) using the Marshall procedure. Statistical analysis of stability and flow results was performed to determine the mix with maximum stability and acceptable flow. Five research questions guided the investigation, addressing the effects of binder content on mechanical performance, volumetric properties, and long-term serviceability. Research gaps were identified in the existing literature, particularly regarding local aggregate sources and temperature susceptibility prior to 2016. Methodology details include sample preparation, mixing, compaction, testing protocols, and data analysis techniques. Results indicate that a binder content of 5.0 % yields optimal stability (kN) and flow (mm) values within recommended limits. Conclusions summarize the findings, propose recommendations for field application, and outline directions for further study. Ten references up to 2016 are provided in APA style.
Keywords Marshall Stability, bituminous mix design, optimum binder content, flexible pavement, statistical analysis
References
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