PERFORMANCE OPTIMIZATION OF CEMENT MORTARS WITH PARTIAL REPLACEMENT OF INDUSTRIAL WASTE SLUDGE: A RESPONSE SURFACE METHODOLOGY APPROACH

Yıl 2025, Cilt: 9 Sayı: 3, 656 - 667, 28.12.2025

Dr. Şükrü Özkan

https://doi.org/10.46519/ij3dptdi.1786643

Öz

In this study, the potential use of wood-based industrial waste sludge (IWS) as a partial replacement material in cement mortars was investigated. The primary aim of the study is to evaluate the feasibility of utilizing this waste in the production of sustainable construction materials. For this purpose, mortar specimens with different substitution ratios of IWS were prepared and tested for flexural strength, and the results were modeled using Response Surface Methodology (RSM). Analysis of variance (ANOVA) revealed that cement content and curing duration had significant effects on flexural strength. The RSM model successfully predicted the experimental outcomes with a high coefficient of determination (R²> 95%), and its accuracy was verified through validation tests. Optimization results indicated that 450 kg/m³ cement and approximately 81,6 days of curing were the optimum parameters, where the experimental flexural strength was 11,60 MPa, while the RSM prediction was 11,76 MPa with an error margin of only 1,38%. Consequently, it was concluded that IWS can be considered a sustainable supplementary material at low substitution levels in cement mortars, and that RSM is an effective tool for reliable modeling and optimization of mechanical performance.

Anahtar Kelimeler

Waste , Sludge , Cement , Flexural Strength , Optimization , Response Surface Methodology.

Etik Beyan

This study was prepared solely by me, complies with research and publication ethics, and has no conflict of interest.

Teşekkür

The author gratefully acknowledges Orma Inc. for providing the material support used in this research.

ÇİMENTO HARÇLARINDA ENDÜSTRİYEL ATIK ÇAMURUNUN KISMİ İKAMESİNE YÖNELİK PERFORMANS OPTİMİZASYONU: YANIT YÜZEYİ METODOLOJİSİ YAKLAŞIMI

Öz

ÖZ
Bu çalışmada, ahşap esaslı endüstriyel atık çamurunun (EAÇ) çimento harçlarında kısmi ikame malzemesi olarak kullanılabilirliği araştırılmıştır. Çalışmanın temel amacı, atık malzemenin sürdürülebilir inşaat malzemesi üretiminde değerlendirilebilirliğini ortaya koymaktır. Bu kapsamda, farklı oranlarda EAÇ ikamesi ile hazırlanan numuneler üzerinde eğilme dayanımı deneyleri gerçekleştirilmiş ve elde edilen sonuçlar Yanıt Yüzeyi Metodolojisi (YYM) kullanılarak modellenmiştir. Varyans analizi (ANOVA) sonuçları, çimento miktarı ve kür süresinin eğilme dayanımı üzerinde anlamlı etkiler gösterdiğini ortaya koymuştur. YYM modeli yüksek uyum katsayısı (R²> %95) ile deneysel sonuçları başarıyla tahmin etmiş ve model doğruluğu doğrulama deneyleri ile kanıtlanmıştır. Optimizasyon çalışmaları sonucunda, 450 kg/m³ çimento ve yaklaşık 81,6 günlük kür süresi optimum parametreler olarak belirlenmiş, bu koşullarda deneysel değer 11,60 MPa iken YYM tarafından 11,76 MPa olarak tahmin edilmiş ve hata oranı yalnızca %1,38 bulunmuştur. Sonuç olarak, EAÇ’nin düşük ikame oranlarında çimento harçlarında sürdürülebilir bir katkı malzemesi olarak değerlendirilebileceği ve YYM’nin mekanik performansın güvenilir biçimde modellenmesi ve optimizasyonunda etkili bir yöntem olduğu görülmüştür.

Anahtar Kelimeler

Atık , Çamur , Çimento , Eğilme Dayanımı , Optimizasyon , Yanıt Yüzey Yöntemi.

Etik Beyan

Bu çalışma tamamen tarafımdan hazırlanmış olup, araştırma ve yayın etiğine uyulmuştur, çıkar çatışması bulunmamaktadır.

Teşekkür

Bu araştırmada sağladıkları malzeme desteğinden dolayı Orma A.Ş’ye teşekkürlerimi sunarım.

Kaynakça

• 1. Barbhuiya, S., Kanavaris, F., Das, B.B., Idrees, M., “Decarbonising Cement and Concrete Production: Strategies, Challenges and Pathways for Sustainable Development”, Journal of Building Engineering, Vol. 86, Pages 108861, 2024.
• 2. Reuters, “Cement: Building a Green Path in a Hard Industry”, https://www.reuters.com/sustainability/decarbonizing-industries/cement-hard-industry-crack-down-emissions-2025-06-11/”, September 13, 2025.
• 3. Ataabadi, H. S., Zhuge, Y., Liu, Y., “Recycling of Industrial Sludge as Construction Materials”, Wang, L., Guo, B., Ma, B., Wastes to Low-Carbon Construction Materials, Pages 259–273, Woodhead Publishing, Sawston, Cambridge, 2025.
• 4. Ravikumar, B.S., Chandra, H.S.S., Surendra, H.J., “Waste Paper Sludge Ash as a Pozzolanic Material: Enhancing Concrete Performance and Sustainability”, Journal of Building Pathology and Rehabilitation, Vol. 10, Issue 1, Pages 1–16, 2025.
• 5. Jwaida, Z., Dulaimi, A., Alyhya, W., Algretawee, H., and Al-Busaltan, S., “Recycling and Utilization of Paper Sludge Ash-Current Status Review and Future Perspectives”, Vol. 40, 2024.
• 6. Bezerra, M.A., Santelli, R.E., Oliveira, E.P., Villar, L.S., Escaleira, L.A., “Response Surface Methodology (RSM) as a Tool for Optimization in Analytical Chemistry”, Talanta, Vol. 76, Issue 5, Pages 965–977, 2008. 7. Şener, R., Uslu, S., Savaş, A., “The Role of Magnetic Maghemite (Fe2O3) Nanoparticles for the Improvement of 2nd Generation Biodiesel/Diesel Blends: RSM Based Multi-Objective Optimization”, Renewable Energy, Vol. 249, Pages 123211, 2025.
• 8. Savaş, A., Şener, R., Uslu, S., Der, O., “Experimental Study on Performance and Emission Optimization of MgO Nanoparticle-Enriched 2nd Generation Biodiesel: A Method for Employing Nanoparticles to Improve Cleaner Diesel Combustion”, Journal of the Energy Institute, Vol. 120, Pages 102024, 2025.
• 9. Liu, C., Wang, H., Xiao, B., Nie, J., Chen, T., “Insight into the Rheological Property and Flow Resistance of Cemented Paste Backfill Slurry Containing Fly Ash: Influence of Multi-Factor and RSM-Based Ratio Optimization”, Powder Technology, Vol. 467, Pages 121563, 2026.
• 10.Mebarkia, R., Bouzeroura, M., Boumaaza, M., Chelouah, N., Belaadi, A., Alshaikh, I.M. H., Chetbani, Y., Ghernaout, D., “Upcycling Cement Kiln Dust for Manufacturing Clay Bricks Fired at Different Temperatures: RSM and ANN-GA Hybrid-Optimization”, Results in Engineering, Vol. 27, Pages 105683, 2025
• 11. Khan, M.I., “Robust Prediction Models for Flow and Compressive Strength of Sustainable Cement Grouts for Grouted Macadam Pavement Using RSM”, Construction and Building Materials, Vol. 448, Pages 138205, 2024.
• 12. Essam, A., Mostafa, S. A., Khan, M., and Tahwia, A. M., “Modified Particle Packing Approach for Optimizing Waste Marble Powder as a Cement Substitute in High-Performance Concrete”, Construction and Building Materials, Vol. 409, Pages 133845, 2023.
• 13. Abdellatief, M., Elemam, W. E., Alanazi, H., and Tahwia, A. M., “Production and Optimization of Sustainable Cement Brick Incorporating Clay Brick Wastes Using Response Surface Method”, Ceramics International, Vol. 49, Issue 6, Pages 9395–9411, 2023.
• 14. Ali, M., Khan, M. I., Masood, F., Alsulami, B. T., Bouallegue, B., Nawaz, R., and Fediuk, R., “Central Composite Design Application in the Optimization of the Effect of Waste Foundry Sand on Concrete Properties Using RSM”, Structures, Vol. 46, Pages 1581–1594, 2022. 15. TS EN 197-1, “Çimento - Bölüm 1: Genel Çimentolar - Bileşim, Özellikler ve Uygunluk Kriterleri”, Sayfa 1-29, Ankara, 2012.
• 16. TS EN 196-1, “Çimento deney metodları- Bölüm 1: Dayanım tayiniˮ, Sayfa 1-35, Ankara, 2016.
• 17. TS EN 196-6, “Çimento deney yöntemleri - Bölüm 6: İncelik tayini”, Sayfa 1-20, Ankara, 2020.
• 18. Uslu, S., “Optimization of Diesel Engine Operating Parameters Fueled with Palm Oil-Diesel Blend: Comparative Evaluation between Response Surface Methodology (RSM) and Artificial Neural Network (ANN)”, Fuel, Vol. 276, Page 117990, 2020.
• 19. Kumara, R., Singhb, M., “Experimental Investigation of Performance and Emission Characteristics of DI CI Engine with Dual Biodiesel Blends of Mexicana Argemone and Mahua”, Materials Today: Proceedings, Vol. 16, Pages 321–328, 2019.
• 20. Song, R., Yang, Q., and Song, H., “Performance Optimization and Synergistic Mechanism of Ternary Blended Cementitious System Composed of Fly Ash, Slag, and Recycled Micro-Powder”, Buildings, Vol. 15, Issue, 15, Pages 2780, 2025.
• 21. Sabour, M.R., Amiri, A., “Comparative Study of ANN and RSM for Simultaneous Optimization of Multiple Targets in Fenton Treatment of Landfill Leachate”, Waste Management, Vol. 65, Pages 54-62, 2017.
• 22. Wang, J., An, J., Li, Y., Xiang, Y., Xiao, Q., Tang, Z., and Long, G., “Influencing Factors of the Temperature Rise of Direct Electric Curing Concrete and Its Effect on Concrete Properties”, Construction and Building Materials, Vol. 438, Pages 137110, 2024.
• 23. Matajinimvar, S., Choobbasti, A. J., and Soleimani Kutanaei, S., “The Effect of Construction Moisture Content on the Mechanical, Shear and Environmental Characteristics of Clay Stabilized with Cement and CS: A Micro and Macro Study”, Case Studies in Construction Materials, Vol. 22, Pages e04818, 2025.