By: Chaitali Isal, Ajay Sonawane, Prathmesh Kudve, Ayush Padlekar, and Yash Goshte Goshte
1Professor, Department of Civil, Saraswati College of Engineering, Uttar Pradesh, India
2Student, Department of Civil, Saraswati College of Engineering, Uttar Pradesh, India
This study examines the enhancement of cold mix asphalt (CMA) performance through the substitution of fly ash at varying percentages. Specifically, Marshal stability tests were conducted on CMA mixtures with fly ash content of 0%, 2.5%, 5%, and 7.5%. The results reveal a significant increase in peak loads, with the CMA mixture containing no fly ash achieving a peak load of 0.62 kN, while mixtures with 2.5%, 5%, and 7.5% fly ash exhibited peak loads of 8.80 kN, 9.59 kN, and 11.08 kN, respectively. This marked improvement underscores the beneficial impact of incorporating fly ash as a filler in CMA mixtures. Furthermore, the maximum flow values of the CMA mixtures also showed enhancement with the inclusion of fly ash. The CMA without fly ash had a maximum flow value of 2.83 mm, whereas the mixtures with 2.5%, 5%, and 7.5% fly ash demonstrated improved flow values of 4.15 mm, 3.84 mm, and 3.09 mm, respectively. These findings indicate that the addition of fly ash not only boosts the load bearing capacity but also enhances the deformability of the CMA mixtures. The study highlights the potential of fly ash as a sustainable and effective filler material in CMA, contributing to improved mechanical characteristics and reduced moisture susceptibility. The utilization of fly ash in CMA not only promotes sustainability by recycling industrial by-products but also aids in the construction of durable pavement structures. This research provides a foundation for further exploration into the use of alternative materials in pavement construction to enhance performance and sustainability.
Citation:
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