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Influence of Feeding Sequence on the Fluidity and Fluidity Time of Cement Asphalt Mortar for High-Speed Rail Slab Track

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Transportation Research (TPMDC 2022)

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 434))

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Abstract

Cement Asphalt Mortar (CA mortar) is one of the most important materials in the non-ballast slab track for High-Speed Rail (HSR) systems. The fluidity and fluidity time of CA mortar are important parameters for this application. Both these requirements are governed by the early age interaction between cement, bitumen emulsion, and admixtures. The present study investigated the influence of the feeding sequence of these primary constituents of CA mortar on its fluidity and fluidity time. Flow time measurement by Brass J funnel was used as a measure of fluidity and the mechanism behind the flow time variation is analyzed through viscosity and adsorption behavior of CA paste. The sieving method was adopted to investigate the adsorption behavior of bitumen droplets on the cement under different feeding sequences. The results showed that adding bitumen emulsion, water, and water-reducing admixture (WRA) initially increased flow time and apparent viscosity, which is not ideal. Test results of adsorption indicated that the increase in particle size was mainly attributed to higher adsorption (adsorption value) resulting in higher viscosity and flowtime. The feeding sequence in which water-reducing admixture (WRA) was premixed with cement and water prior to introducing bitumen emulsion proved to be beneficial to obtain the desired fluidity and fluidity time.

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Acknowledgements

The authors acknowledge the research grant and support from the National High-Speed Rail Corporation Limited, India. In addition, the authors also want to thank Fosroc Chemicals Pvt. Ltd, India, Nouryon Chemicals India Pvt. Ltd. and Cat’s Whiskers Pvt. Ltd. for the supply of materials.

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Authors and Affiliations

  1. Indian Institute of Technology Kharagpur, Kharagpur, 721302, India

    Rahul Reddy Banapuram, Kranthi K. Kuna & M. Amarnatha Reddy

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  1. Rahul Reddy Banapuram
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  2. Kranthi K. Kuna
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  3. M. Amarnatha Reddy
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Corresponding author

Correspondence to Rahul Reddy Banapuram .

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Editors and Affiliations

  1. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Dharamveer Singh

  2. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Avijit Maji

  3. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Omkar Karmarkar

  4. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Monik Gupta

  5. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Nagendra Rao Velaga

  6. Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India

    Solomon Debbarma

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Banapuram, R., Kuna, K.K., Amarnatha Reddy, M. (2024). Influence of Feeding Sequence on the Fluidity and Fluidity Time of Cement Asphalt Mortar for High-Speed Rail Slab Track. In: Singh, D., Maji, A., Karmarkar, O., Gupta, M., Velaga, N.R., Debbarma, S. (eds) Transportation Research. TPMDC 2022. Lecture Notes in Civil Engineering, vol 434. Springer, Singapore. https://doi.org/10.1007/978-981-99-6090-3_15

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  • DOI: https://doi.org/10.1007/978-981-99-6090-3_15

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-99-6089-7

  • Online ISBN: 978-981-99-6090-3

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