Influence of ZycoTherm Dosage on Polymer Modified Bitumen and Marshall Performance of Hydrated Lime Incorporated Warm Mix Bituminous Concrete

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Year : 2026 | Volume : 14 | 03 | Page :
    By

    Ashraf Mahmad Mathakiya,

  • Hemantkumar G. Sonkusare,

  1. Ph.D. Scholar, Department of Civil Engineering, Atmiya University, Rajkot, Gujarat, India
  2. Research Supervisor, Department of Civil Engineering, Atmiya University, Rajkot, Gujarat, India

Abstract

This study examines the effect of ZycoTherm on PMB 76-10 binder characteristics and the performance of PMB-based Bituminous Concrete (BC) Grade-II prepared at reduced mixing temperatures, with and without hydrated lime. PMB 76-10 was modified with ZycoTherm at dosages of 0.05%, 0.10%, 0.15%, and 0.20% by weight of binder and evaluated using conventional and residue-based tests. Increasing ZycoTherm dosage decreased penetration, while softening point, flash point, and elastic recovery increased, indicating improved stiffness, thermal stability, and recoverable behaviour. Residue properties after short-term aging also improved with additive dosage. For mixture evaluation, BC Grade-II mixtures with 6.4% binder were prepared at mixing temperatures of 165, 135, 125, and 115 °C with 0% and 3% hydrated lime. Marshall stability, flow, Marshall Quotient, and volumetric parameters were assessed. Stability and Marshall Quotient increased up to 0.10% ZycoTherm and decreased at higher dosages, while flow showed the opposite trend. Reducing mixing temperature adversely affected Marshall and volumetric properties, and the minimum stability requirement of MoRTH-V Revision and IRC: SP:135-2022 was not satisfied at 115 °C. Hydrated lime improved mixture performance. Overall, 0.10% ZycoTherm was found optimum, and reduced-temperature production was feasible up to 125 °C.

Keywords: ZycoTherm, polymer-modified bitumen, PMB 76-10, warm mix asphalt, hydrated lime, Marshall stability, bituminous concrete, ANOVA, Regression analysis.

How to cite this article:
Ashraf Mahmad Mathakiya, Hemantkumar G. Sonkusare. Influence of ZycoTherm Dosage on Polymer Modified Bitumen and Marshall Performance of Hydrated Lime Incorporated Warm Mix Bituminous Concrete. Journal of Polymer & Composites. 2026; 14(03):-.
How to cite this URL:
Ashraf Mahmad Mathakiya, Hemantkumar G. Sonkusare. Influence of ZycoTherm Dosage on Polymer Modified Bitumen and Marshall Performance of Hydrated Lime Incorporated Warm Mix Bituminous Concrete. Journal of Polymer & Composites. 2026; 14(03):-. Available from: https://journals.stmjournals.com/jopc/article=2026/view=243162


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Ahead of Print Subscription Original Research
Volume 14
03
Received 28/04/2026
Accepted 05/05/2026
Published 07/05/2026
Publication Time 9 Days
28

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