Faculty Publications

Now showing 1 - 3 of 3

Nanomaterials modified bio asphalt as cutting-edge material for pavement construction: a review on the present status and future outlook
(BioMed Central Ltd, 2025) Vidya, V.; Das, B.B.; Cyril Thomas, C.T.A.; Durairaj, M.; Bhuvaneshwari, B.
Nanomaterials research field has gained prominence in scientific community. The current scenario of exhaustion of sustainable resources and excessive energy usage have impacted the research thrust on potential use of cutting-edge materials and technologies. The current scenario of nanomaterials modified bio asphalt (NMBA) for pavements is reviewed. Firstly, the blends of nanomaterial and bio asphalt studies with their performance aspects are summarized in a methodical manner highlighting the enhancements of conventional properties like penetration, ductility, softening point, viscosity, rheological characteristics namely age, fatigue, high and low temperatures. The outcomes of the review present that nano materials could considerably show improved viscosity, Low & high-temperature property of NMBA. The low temperature of NMBA is marginally reduced in comparison to bio-asphalt without nanoparticles. Additionally, sustainability of biochar modified bitumen is assessed, taking into account its economic viability, environmental impact, life cycle evaluation, and reduction of carbon footprint. Subsequently, potential paths ahead are explored unearthing its prospective applications and future prospects to support safer and sustainable roads. Large scale and real time implementation of such studies would contribute to reducing environmental burden and will pave way for achieving sustainable development goals. © The Author(s) 2025.
Biochar-concrete: A comprehensive review of properties, production and sustainability
(Elsevier Ltd, 2024) Barbhuiya, S.; Das, B.B.; Kanavaris, F.
The utilisation of biochar in concrete has attracted considerable attention due to its potential in enhancing the properties and sustainability of this construction material. This in-depth review delves into various aspects of biochar-concrete composites. It commences by defining biochar and exploring its production methods, physical and chemical properties. Additionally, the review provides an overview of concrete, emphasising its composition, properties and the challenges associated with traditional production methods. The incorporation of biochar in concrete brings forth several benefits, such as improved strength and durability, enhanced thermal properties and the potential for carbon sequestration. The paper examines the production process of biochar-concrete composites, covering aspects like incorporation methods, biochar selection, mixing techniques and quality control measures. Furthermore, the sustainability aspects of biochar-concrete are evaluated, considering its environmental impact, life cycle assessment, carbon footprint reduction and economic feasibility. The review also addresses the challenges and future perspectives of biochar-concrete composites, along with opportunities for research and development. This comprehensive review presents valuable insights into the properties, production and sustainability of biochar-concrete composites. It serves as a guide for further advancements in the realm of sustainable construction. © 2024 The Authors
Areca nut husk biochar as a sustainable carbonaceous filler for cement: Pyrolysis temperature and its effect on characterization, strength, and hydration
(Elsevier B.V., 2024) Manjunath, B.; Ouellet-Plamondon, C.M.; Das, B.B.; Rao, S.; Bhojaraju, C.; Rao, M.
This study addresses the gap in sustainable agro-based materials for cement by exploring locally available areca nut husk pyrolyzed into areca nut husk biochar (AB). The research investigated the effect of pyrolysis temperature (300°C, 400°C, and 500°C) on the characteristics of AB and its impact on cementitious performance. The study found that increasing pyrolysis temperatures led to lower yield, greater aromaticity, and increased surface area of AB. Fourier Transform Infrared Spectroscopy (FTIR) analysis showed decreased functional groups in AB at higher temperatures, confirming enhanced carbonization. Thermogravimetric analysis (TGA) revealed greater thermal stability of AB. X-ray diffraction (XRD) indicated a carbon-rich amorphous structure and crystalline graphite carbon formation in AB. Incorporating AB at 2 % into cementitious composites substantially increased the compressive strength compared to the control mortar. At 7 and 28 days, the compressive strength increased by 8 % and 12 % for AB 300, 16 % and 21 % for AB 400, and 27 % and 34 % for AB 500. This improvement was due to the micro filler effect of AB, which improved the compactness of the cementitious matrix. Hydration studies from TGA showed that the addition of AB accelerated early-stage hydration, with the degree of hydration increasing from 46 % (in control mix) to 48–53 % in AB blended mixes using Bhatty's method. FTIR analysis demonstrated improved hydration of silicate phases and C-S-H formation in the presence of AB, supported by XRD analysis. AB blended mortar reduced the CO2 equivalent emission by 22 % compared to the control mortar attributed to its carbon sequestration capacity. These results highlight the potential of AB as a sustainable carbonaceous filler for cementitious composites, offering an environmentally friendly option for future research in construction materials. © 2024 Elsevier B.V.

Faculty Publications

Browse

Filters

Settings

Sort By

Results per page

Search Results