Hypo Sludge as Sustainable Construction Material for False Ceiling Panel

Abstract

Rapid industrialization and paper manufacturing generate large quantities of hypo sludge, creating significant disposal and environmental challenges. This study investigates the feasibility of utilizing hypo sludge as a sustainable construction material for false ceiling panels by combining it with gypsum and polypropylene fiber. Eight different mix proportions were developed, including 100% hypo sludge, 100% gypsum, hypo sludge–gypsum combinations of 70:30, 65:35, and 60:40, and fiber-reinforced mixes of 70:25:5, 65:30:5, and 60:35:5. The developed specimens were experimentally evaluated for compressive strength, flexural strength, and water absorption. Gypsum improved bonding, strength, surface finish, and dimensional stability, while polypropylene fiber enhanced crack resistance, toughness, flexural performance, and durability. The fiber-reinforced mixes demonstrated better overall performance than hypo sludge-rich mixes. Among the investigated compositions, the 60:35:5 mix showed the best overall performance among the hypo sludge-based mixes. The study demonstrates that properly proportioned hypo sludge composites can provide a lightweight and sustainable alternative for non-structural interior false ceiling applications while reducing industrial waste disposal and supporting environmentally responsible construction practices.

Introduction

The text presents a study on developing a sustainable false ceiling panel using hypo sludge, gypsum, and polypropylene fiber. The main objective is to convert paper-industry waste into a useful, lightweight, economical, and environmentally friendly construction material.

1. Background and need for the study

Industrialization and paper manufacturing generate large quantities of hypo sludge, which is commonly disposed of through dumping or landfilling. Improper disposal can cause land and environmental problems and requires significant disposal space.

Hypo sludge contains calcium compounds and fibrous materials, making it potentially useful in construction. However, raw hypo sludge has limitations such as:

• Low strength
• High porosity
• High water absorption
• Brittle behavior

The study therefore proposes combining hypo sludge with gypsum to improve bonding and strength and polypropylene fiber to improve crack resistance and flexural performance.

2. Research objective

The study aims to develop and evaluate an eco-friendly false ceiling panel for non-structural interior applications. It seeks to:

• Reduce paper-industry waste.
• Reduce dependence on conventional construction materials.
• Develop a lightweight and economical ceiling material.
• Improve mechanical performance using gypsum and polypropylene fiber.
• Evaluate compressive strength, flexural strength, and water absorption.
• Identify the optimum material combination for false ceiling applications.

The research was partly motivated by observations at a paper mill sludge disposal site in Ballarpur, Maharashtra, where vegetation was growing over deposited sludge, encouraging investigation into alternative uses for the waste.

3. Previous research

Earlier studies have demonstrated that paper-industry sludge can be used in:

• Concrete
• Bricks
• Cement-based composites
• Masonry products
• Tiles and other construction materials

However, comparatively little research has focused specifically on false ceiling panels made from hypo sludge. The present study attempts to address this research gap.

4. Research methodology

The experimental process involves:

Raw-material collection → Material characterization → Mix development → Specimen casting → Curing → Laboratory testing → Performance analysis → Comparative evaluation → Optimum mix selection

The study follows relevant Indian Standards, including:

• IS 2095 (Part 1): 2011 for gypsum plaster boards
• IS 2542 for testing gypsum products
• IS 8272 for gypsum ceiling tiles and panels

5. Mix proportions

Eight different mixes were investigated:

Cube specimens were prepared for compressive-strength testing, while prism specimens were prepared for flexural-strength testing.

6. Experimental findings described

The compressive-strength investigation indicates that pure hypo sludge has relatively low strength and develops cracks at lower loads. Adding gypsum improves bonding and compressive performance. The incorporation of polypropylene fiber further improves crack resistance and failure behavior.

The study also investigates flexural strength and water absorption to determine whether the developed composites are suitable for false ceiling applications.

Conclusion

The study successfully investigated the feasibility of utilizing hypo sludge as a sustainable construction material for non-structural false ceiling panels. Different proportions of hypo sludge, gypsum, and polypropylene fiber were prepared and evaluated through compressive strength, flexural strength, and water absorption tests. The results showed that pure hypo sludge had poor mechanical and moisture-resistance characteristics, while gypsum improved bonding and strength. The addition of polypropylene fiber further enhanced crack resistance, toughness, and flexural performance. Among the hypo sludge-based mixes, M8 (60% hypo sludge + 35% gypsum + 5% polypropylene fiber) demonstrated the best overall performance, with a compressive strength of 0.37 N/mm² and flexural strength of 13.60 N/mm². The developed material was found suitable for lightweight, non-load-bearing false ceiling applications. The study also demonstrates that utilizing hypo sludge can reduce industrial waste disposal, promote resource conservation, and support sustainable construction practices. Therefore, the developed hypo sludge-based composite can be considered an economical and environmentally friendly alternative for selected interior false ceiling applications.

References

[1] K. Chandra Sekar, R. Murugesan, M. Sivaraja, and R. Prakash, “Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex,” Sustainability, vol. 15, no. 14, p. 10986, 2023, doi: 10.3390/su151410986. [2] R. Maheswaran, M. K. Marichelvam, and S. P. Asok, “Development of value-added sustainable products from paper mill sludge: An experimental approach,” Heliyon, vol. 9, no. 6, p. e17517, 2023, doi: 10.1016/j.heliyon.2023.e17517. [3] A. Chouksey, N. Dev, V. V. L. Kantarao, and M. Verma, “Application of Paper Mill Lime Sludge Waste in Building Construction Material: State of the Art Report,” Journal of Polymer and Composites, vol. 12, no. 7, pp. 73–88, 2024. [4] A. Hussain, “Performance comparison of cement replacing materials in concrete: Hypo sludge,” Journal of the Maharaja Sayajirao University of Baroda, vol. 58, no. 1, 2024. [5] A. Chouksey, N. Dev, and V. V. L. Kanta Rao, “Effect of Calcination Condition and Cooling Method on Reactivity of Lime Sludge,” Journal of Polymer and Composites, vol. 11, Special Issue 10, pp. 36–48, 2024. [6] Nitin Mishra, Kamlesh Kumar Choudhary “A Study Of Industrial Waste Hypo Sludge And Metakaolin For Partial Replacement Of Cement In Mix Concrete; A Review” International Journal of Scientific Research and Engineering Development-– Volume 7 Issue 4, July-Aug 2024 [7] Krishnan Chandra Sekar, Ramasamy Murugesan , Muthusamy Sivaraja And Ramaiah Prakash “Development Of Sustainable Concrete From Hypo Sludge Combined With Basalt Fibre And Latex” Sustainability 2023, 15, 10986. https://doi.orghttps://www.mdpi.com/journal/sustainability [8] Denendra Meena , Dr. Rajeev Singh Parihar “Performance Of Concrete By Using Hypo Sludge And Steel Fibre As Partial Replacement Of Cement And Sand By Adding Superplasticizer” International Journal of Research Publication and Reviews, Vol 4, no 8, pp 2462-2468 August 2023 [9] Sunil B S, Megha Yadav “Research On The Effects Of Hypo Sludge As A Partial Replacement Of Cement Mortar” International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 04 | Apr 2022 [10] K. Venkatalakshmi, N. S. Elangovan “Experimental Work on Deciphering Hypo Sludge Potential Efficiency as an Eco-Friendly Material” Journal of Environmental Protection and Ecology 22, No 4, 1468–1477 (2021) [11] Madhav Singh Yadav ,Dr.Rajeev Jain ,Dr.Bablu Kirar “Comparative Study Of Conventional Bricks With Hyposludge And Fly Ash Bricks” Journal of Emerging Technologies and Innovative Research 2020 JETIR December 2020, Volume 7, Issue 12 [12] Amit Richhariya, Nitesh Kuashwaha “A Suitability Analysis Of Paper Waste Sludge In Cement Concrete” IJSRD - International Journal for Scientific Research & Development| Vol. 7, Issue 11, 2020 | ISSN (online): 2321-0613 [13] Hardeep Singh Saluja , Sourabh Rajoriya “Investigation On Utilization Of Hyposludge And Jute Fibre In The Production Of High-Performance Concrete” International Journal of Civil and Structural Engineering Research Vol. 6, Issue 2, pp: (254-259), Month: October 2018 - March 2019 [14] Keval Mehta, Prof. (Mrs) Reshma L. Patel, Dr. Jayeshkumar Pitroda “Utilization of Used Foundry sand and Hypo sludge in Sustainable Mortar: A Review” International Journal of Creative Research Thoughts IJCRT | Volume 6, Issue 1 January 2018 | ISSN: 2320-2882 [15] Dr. N. Nagarajan, Dr. K. Karthikeyan, Dr. S. Sivaprakasam “Experimental Investigation of Hypo-Sludge Used In Fly-Ash Bricks Manufacturing With The Partial Replacement of Lime” International Journal of Engineering Development and Research IJEDR 2019 | Volume 7, Issue 1 | ISSN: 2321-9939.

Copyright

Copyright © 2026 Sonal Ishwar Gedam, Shilpa Samrutwar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.