Abstract
The present work aimed to evaluate the use of pond ash as subbase material in flexible pavements through laboratory investigations. The pavement-related parameters such as unconfined compression strength, resilient modulus, and permanent deformation of pond ash through lime modification were investigated. The effect of lime and impact of various stress levels (both confining and deviatoric) on the pond ash were investigated. The results indicate that the addition of lime enhances the unconfined compression strength values of pond ash significantly at 6 to 8% and meets the minimum strength recommended by IRC for pavement subbase applications. Resilient modulus values of lime-modified pond ash increased with an increase in stress levels acting around the specimen. The accumulation rate of permanent deformation decreased progressively with an increase in load cycles regardless of lime contents. Measured resilient modulus and permanent deformation values were further compared and validated with existing mechanistic-empirical prediction models (two-parameter based models (M1, M2), and three-parameter models (M3, M4)), and found satisfactory results with three-parameter–based models.
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The granted fellowship from MHRD and support from NIT Warangal, civil engineering department for conducting research experiments are greatly appreciated.
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Mogili, S., Paluri, Y., Noolu, V. et al. Effect of Lime on Resilient Characteristics of Pond Ash. Transp. Infrastruct. Geotech. 8, 542–556 (2021). https://doi.org/10.1007/s40515-021-00152-z
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DOI: https://doi.org/10.1007/s40515-021-00152-z