Utilizing synergy of MLG and MWCNT with optimized mixing protocol to improve the high temperature stability of SBS modified bitumen

Bansal, Shubham; Gupta, Vivek; Chopra, Tanuj; Mehta, Rajeev

doi:10.1016/j.conbuildmat.2024.138382

Construction and Building Materials

2024

DOI: 10.1016/j.conbuildmat.2024.138382

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Utilizing synergy of MLG and MWCNT with optimized mixing protocol to improve the high temperature stability of SBS modified bitumen

Shubham Bansal,

Vivek Gupta,

Tanuj Chopra

et al.

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Cited by 2 publications

References 70 publications

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Styrene-Butadiene-Styrene polymer modified bitumen: A review on compatibility and physico-chemical properties

Bansal,

Gupta,

Chopra

et al. 2024

Phys. Scr.

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The triblock elastomeric copolymer Styrene-Butadiene-Styrene (SBS) improves the engineering properties of bitumen and the performance parameters of flexible pavements. Although research investigations have been conducted worldwide, the literature lacks a comprehensive review to provide the up-to-date research status in this field. The current review summarizes the research findings on the compatibility, stability, physical properties, microscopic characterization, and chemical characterization of SBS modified bitumen. Quantitative analysis of physical test results concerning major pavement distresses shows improvement, particularly in high-temperature zones. The interlocked state of phase transition can be achieved at SBS content between 5-6% and the optimum SBS content has been reported to lie within this range. The blending temperature of SBS modified bitumen varies between 140℃-210℃ out of which 180℃ is the most frequently used by researchers. In addition, physical and chemical characteristics of aged binder have been reviewed. Aging indices (residual penetration ratio, change in softening point, viscosity aging ratio, residual ductility ratio) didn’t show any consistent trend, which establishes the need of exploring the co-additives to substantially improve the aging deterioration. Preliminary research on nano-additives showed the improved storage stability at high temperature and the performance of aged modified bitumen. This review has drawn essential conclusions and highlights existing research gaps for peer researchers and field engineers.

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Styrene-Butadiene-Styrene polymer modified bitumen: A review on compatibility and physico-chemical properties

Bansal,

Gupta,

Chopra

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

Fundamental Thermodynamic Aspects for the Effective Dispersion of Carbon Nanotubes and Improve Performance Grade of Bitumen

Lapidus,

Topchiy,

Obukhova

2024

Applied Sciences

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The application of carbon nanotubes to enhance bitumen properties is relevant due to the need to increase the durability of asphalt concrete pavements and reduce maintenance costs. Key areas requiring further study include the processes during ultrasonic dispersion, the selection of the optimal medium, and the stability of the resulting dispersions. This study examines dispersions containing multi-walled carbon nanotubes (MWCNTs) Taunit M (from 5·10−4 to 5·10−2%) and various hydrocarbon plasticizers. For the first time, the change in Gibbs free energy, enthalpy (interaction energy), and mixing and disordering entropy was calculated based on experimental data (surface tension, average cubic diameter of MWCNTs, molecular mass, etc.). The data were compared with the storage stability of polymer-modified binders (PMBs). It was found that mixing entropy plays a key role in forming thermodynamically stable dispersions, while the contribution of disordering entropy is minimal. High dispersion enthalpy of MWCNTs can reduce dispersion stability at high concentrations despite entropy growth. Systems with selective purification extracts showed the best PMB stability despite thermodynamic instability. The property changes after 3 days at 180 °C were no more than 5%. This suggests structural changes from component interactions are critical, highlighting the need for an integrated approach considering both thermodynamic and macroscopic properties.

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Utilizing synergy of MLG and MWCNT with optimized mixing protocol to improve the high temperature stability of SBS modified bitumen

Cited by 2 publications

References 70 publications

Styrene-Butadiene-Styrene polymer modified bitumen: A review on compatibility and physico-chemical properties

Styrene-Butadiene-Styrene polymer modified bitumen: A review on compatibility and physico-chemical properties

Fundamental Thermodynamic Aspects for the Effective Dispersion of Carbon Nanotubes and Improve Performance Grade of Bitumen

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