Abstract
The need for sustainable, practical alternatives to Portland cement and two-part alkali-activated systems has led to the development of one-part alkali-activated concrete (OPAAC), which efficiently reuses industrial by-products like fly ash and ground granulated blast furnace slag (GGBS). This study evaluates the fresh (workability) and hardened properties (compressive, tensile, and flexural strengths) of FA-GGBS-based OPAAC, along with durability indicators including sorptivity and chloride ion permeability. A performance-based multi-response optimization using a Taguchi L9 array and Grey Relational Analysis (GRA) is adopted to optimize the binder ratio (FA: GGBS), water-to-binder ratio (w/b), and activator-to-binder ratio (A/b). SEM and XRD analyses indicate that the porous, N-A-S-H–dominated matrix observed in FA-rich mixes gradually evolves into a denser C-A-S-H/N-C-A-S-H gel network as the GGBS content increases, correlating with improved strength and durability. The optimal OPAAC mix, achieving an M40 grade concrete, is obtained at a 70:30 binder ratio, a water-to-binder ratio (w/b) of 0.35, and an activator-to-binder (A/b) ratio of 14%. This work directly supports global sustainability efforts by promoting low-carbon materials, resource efficiency, and environmentally responsible construction, aligning with SDGs 9, 11, 12 and 13.
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References
Nath, P. & Sarker, P. K. Effect of GGBFS on setting, workability and early strength properties of fly Ash geopolymer concrete cured in ambient condition. Constr. Build. Mater. 66, 163–171 (2014).
Cheng, D. et al. Projecting future carbon emissions from cement production in developing countries. Nat Commun 14, (2023).
Galusnyak, S. C., Petrescu, L. & Cormos, C. C. Environmental impact assessment of post-combustion CO2 capture technologies applied to cement production plants. J. Environ. Manage. 320, 115908 (2022).
Mohamad, N., Muthusamy, K., Embong, R., Kusbiantoro, A. & Hashim, M. H. Environmental impact of cement production and solutions: A review. Mater. Today Proc. 48, 741–746 (2021).
Abhishek, H. S., Prashant, S., Kamath, M. V. & Kumar, M. Fresh mechanical and durability properties of alkali-activated fly ash-slag concrete: a review. Innovative Infrastructure Solutions. 7, 1–14 (2022).
Nedeljković, M., Li, Z. & Ye, G. Setting, strength, and autogenous shrinkage of alkali-activated fly Ash and slag pastes: effect of slag content. Materials 11, (2018).
Mehta, A. & Siddique, R. Sustainable geopolymer concrete using ground granulated blast furnace slag and rice husk ash: strength and permeability properties. J. Clean. Prod. 205, 49–57 (2018).
Mallikarjuna Rao, G. & Gunneswara Rao, T. D. A quantitative method of approach in designing the mix proportions of fly Ash and GGBS-based geopolymer concrete. Australian J. Civil Eng. 16, 53–63 (2018).
Qu, F., Li, W., Wang, K., Zhang, S. & Sheng, D. Performance deterioration of fly ash/slag-based geopolymer composites subjected to coupled Cyclic preloading and sulfuric acid attack. J. Clean. Prod. 321, 128942 (2021).
Pandit, P. Experimental study on accelerated corrosion technique of OPC and PPC beams in coastal environment. J. Corros. Sci. Eng. 22, 1–15 (2019).
Bhagwat, Y., Nayak, G., Lakshmi, A. & Pandit, P. Corrosion of reinforcing bar in RCC Structures—A review. Lecture Notes Civil Eng. 162, 813–826 (2022).
Pandit, P., Venkataramana, K., Babunarayan, K. S., Parla, B. & Kimura, Y. Experimental studies on the effects of corrosion on the flexural strength of RC beams. Int. J. Earth Sci. Eng. 7, 320–324 (2014).
Bras, A., van der Bergh, J. M., Mohammed, H. & Nakouti, I. Design service life of Rc structures with self-healing behaviour to increase infrastructure carbon savings. Materials 14, (2021).
Castillo, M., Hernández, K., Rodriguez, J. & Eyzaguirre, C. Low permeability concrete for buildings located in marine atmosphere zone using clay brick powder. IOP Conf. Ser. Mater. Sci. Eng 758, (2020).
Dhanya, B. S. & Santhanam, M. Performance evaluation of rapid chloride permeability test in concretes with supplementary cementitious materials. Mater. Structures/Materiaux Et Constructions. 50, 1–9 (2017).
Pillai, R. G., Gettu, R. & Santhanam, M. Use of supplementary cementitious materials (SCMs) in reinforced concrete systems – Benefits and limitations. Revista ALCONPAT. 10, 147–164 (2020).
Mehta, A., Siddique, R., Ozbakkaloglu, T., Ahmed Shaikh, U., Belarbi, R. & F. & Fly Ash and ground granulated blast furnace slag-based alkali-activated concrete: Mechanical, transport and microstructural properties. Constr. Build. Mater. 257, 119548 (2020).
Kanagaraj, B., Alengaram, N. A., Raj, U. J., Tattukolla, K. & R, S., B, P. & Performance evaluation on engineering properties and sustainability analysis of high strength geopolymer concrete. J. Building Eng. 60, 105147 (2022).
Reddy, R. K. & Yaragal, R. Sagar Srinivasa, A. One-part eco-friendly alkali-activated concrete – An innovative sustainable alternative. Constr. Build. Mater. 408, 133741 (2023).
Nematollahi, B., Sanjayan, J. & Shaikh, F. U. A. Synthesis of heat and ambient cured one-part geopolymer mixes with different grades of sodium silicate. Ceram. Int. 41, 5696–5704 (2015).
Alsalman, A. et al. and CO2 emission assessments of alkali-activated concrete and ordinary Portland cement concrete: A comparative analysis of different grades of concrete. Cleaner Environ. Systems 3, (2021).
Sheshadri, A., Marathe, S., Rodrigues, A. P., Fernandes, R. & Sadowski, Ł. Synergy of industrial wastes in eco-friendly, air-cured alkali activated pavement concrete composites: properties, embodied carbon and energy assessment and modelling. Road. Mater. Pavement Des. 1–30. https://doi.org/10.1080/14680629.2025.2495705 (2025).
Li, N., Shi, C., Zhang, Z., Wang, H. & Liu, Y. A review on mixture design methods for geopolymer concrete. Compos. B Eng. 178, 107490 (2019).
Hadi, M. N. S., Zhang, H. & Parkinson, S. Optimum mix design of geopolymer pastes and concretes cured in ambient condition based on compressive strength, setting time and workability. J. Building Eng. 23, 301–313 (2019).
Serag, M. I., Ibrahim, S., Badawy, A. H., Helal, Y. H. & El-Feky, M. S. Impact of precursor materials and activator interactions on the microstructural and mechanical properties of one part alkali activated concrete. Sci Rep 15, (2025).
Nath, P., Sarker, P. K. & Rangan, V. B. Early age properties of low-calcium fly Ash geopolymer concrete suitable for ambient curing. Procedia Eng. 125, 601–607 (2015).
Mehta, A. & Siddique, R. Properties of low-calcium fly Ash based geopolymer concrete incorporating OPC as partial replacement of fly Ash. Constr. Build. Mater. 150, 792–807 (2017).
Saloma, H., Elysandi, D. O. & Meykan, D. G. Effect of Na2SiO3/NaOH on mechanical properties and microstructure of geopolymer mortar using fly ash and rice husk ash as precursor. AIP Conf Proc (2017). (1903).
Bondar, D. et al. Alkali activated slag concretes designed for a desired slump, strength and chloride diffusivity. Constr. Build. Mater. 190, 191–199 (2018).
Mehta, A. & Siddique, R. An overview of geopolymers derived from industrial by-products. Constr. Build. Mater. 127, 183–198 (2016).
Kamath, M. V., Prashanth, S. & Kumar, M. Review of Low To High Strength Alkali-Activated and Geopolymer Concrete Vol. 105 (Springer Singapore, 2021). Lecture Notes in Civil Engineering.
Sun, Y., Liu, Z., Ghorbani, S., Ye, G. & De Schutter, G. Fresh and hardened properties of alkali-activated slag concrete: the effect of fly Ash as a supplementary precursor. J. Clean. Prod. 370, 133362 (2022).
Hamsashree, Pandit, P., Prashanth, S. & Katpady, D. N. Durability of alkali-activated fly ash-slag concrete- state of Art. Innovative Infrastructure Solutions. 9, 1–21 (2024).
Dave, S. V. & Bhogayata, A. The strength oriented mix design for geopolymer concrete using Taguchi method and Indian concrete mix design code. Constr. Build. Mater. 262, 120853 (2020).
Dave, S. V., Bhogayata, A. & Arora, N. K. Mix design optimization for fresh, strength and durability properties of ambient cured alkali activated composite by Taguchi method. Constr. Build. Mater. 284, 122822 (2021).
Mehta, A. et al. Influence of various parameters on strength and absorption properties of fly Ash based geopolymer concrete designed by Taguchi method. Constr. Build. Mater. 150, 817–824 (2017).
Haq, A. N., Marimuthu, P. & Jeyapaul, R. Multi response optimization of machining parameters of drilling Al/SiC metal matrix composite using grey relational analysis in the Taguchi method. Int. J. Adv. Manuf. Technol. 37, 250–255 (2008).
Agrawal, T. et al. Optimization of engine performance parameters and exhaust emissions in compression ignition engine fueled with biodiesel-alcohol blends using Taguchi method, multiple regression and artificial neural network. Sustainable Futures. 2, 100039 (2020).
Sivaiah, P. & Chakradhar, D. Modeling and optimization of sustainable manufacturing process in machining of 17 – 4 PH stainless steel. Meas. (Lond). 134, 142–152 (2019).
Srinivasan, T., Arunkumar, R., Meghanathan, S. & Ramu, P. Multi response optimization of drilling parameters in glass fiber reinforced thermoplastic composites. IOP Conf. Ser. Mater. Sci. Eng. 1112, 012016 (2021).
Jozić, S., Bajić, D. & Celent, L. Application of compressed cold air cooling: achieving multiple performance characteristics in end milling process. J. Clean. Prod. 100, 325–332 (2015).
Ansari, M. A., Shariq, M. & Mahdi, F. Multi-optimization of FA-BFS based geopolymer concrete mixes: A synergistic approach using grey relational analysis and principal component analysis. Structures 71, 108007 (2025).
Mosafer, M., Khodabakhshian, A. & Ghalehnovi, M. Optimizing the mechanical properties of sustainable self-compacting concrete contains industrial by-products by using Taguchi and Grey-Taguchi methods. Case Stud. Constr. Mater. 22, e04692 (2025).
Ali, A. et al. Bux alias Imran latif Qureshi, Q. Enhancing multi-objective mix design for GGBS-based geopolymer concrete with natural mineral blends under ambient curing: A Taguchi-Grey relational optimization. Ain Shams Eng. J. 15, 102708 (2024).
Mahendra, K., Narasimhan, M. C., Prakash, G. B. & Das, A. K. Experimental investigation and optimization of one-part alkali-activated self-compacting concrete mixes. Case Stud. Constr. Mater. 21, e04062 (2024).
Sheelavantar, P. G., Pandit, P., Prashanth, S., Nishit, N. & Jadhav, M. Taguchi-integrated grey relational analysis for multi-response optimization of mix design for alkali-activated concrete. Mater Res. Express 11, (2024).
Panugalla, R. R., Rayana, H., Kolli, R. & Jain, L. Optimizing mix design of hybrid fiber reinforced concrete with Abaca and polypropylene fibers through Taguchi method and grey relational analysis approach. Green. Technol. Sustain. 3, 100200 (2025).
Majhi, B., Ranjan, R. & Mondal, S. Multi response optimization of recycled aggregate based alkali-activated concrete using Taguchi-Grey relational analysis method. Constr. Build. Mater. 441, 137519 (2024).
Khan, S., Al-Deen, S. & Lee, C. K. Development of low carbon concrete with high cement replacement ratio by multi-response optimization. Clean. Mater. 16, 100304 (2025).
Sengupta, J., Dhang, N. & Deb, A. Efficient mix design of one-part alkali-activated concrete using packing density method and its optimization through Taguchi-GRA. Constr. Build. Mater. 438, 136869 (2024).
IS 3812 (Part 1). (Reaffirmed 2022). Pulverized Fuel Ash / Fly Ash - Specification - For Use as Pozzolana in Cement, Cement Mortar and Concrete. 3812 (2017). (2013).
IS 16714. Ground Granulated Blast Furnace Slag for Use in Cement, Mortar and Concrete - Specification. (2018).
IS 383. Coarse and Fine Aggregate for Concrete - Specification. (2016).
Lee, N. K. & Lee, H. K. Setting and mechanical properties of alkali-activated fly ash/slag concrete manufactured at room temperature. Constr. Build. Mater. 47, 1201–1209 (2013).
Sasui, S., Kim, G., Nam, J., Koyama, T. & Chansomsak, S. Strength and microstructure of class-C fly Ash and GGBS blend geopolymer activated in NaOH & NaOH + Na2SiO3. Materials 13, (2020).
Xie, J., Wang, J., Rao, R., Wang, C. & Fang, C. Effects of combined usage of GGBS and fly Ash on workability and mechanical properties of alkali activated geopolymer concrete with recycled aggregate. Compos. B Eng. 164, 179–190 (2019).
Dai, X., Aydin, S., Yardimci, M. Y. & De Schutter, G. Early structural build-up, setting behavior, reaction kinetics and microstructure of sodium silicate-activated slag mixtures with different retarder chemicals. Cem Concr Res 159, (2022).
Mohamed, O. A., Khattab, A. & Al Hawat, W. R. Effect of relative GGBS/fly contents and alkaline solution concentration on compressive strength development of geopolymer mortars subjected to sulfuric acid. Sci Rep 12, (2022).
Srinivasa, A. S., Yaragal, S. C. & Swaminathan, K. Rakesh Kumar Reddy, R. Multi-objective optimization of one-part geopolymer mortars adopting response surface method. Constr. Build. Mater. 409, 133772 (2023).
Olivia, M. & Nikraz, H. Properties of fly Ash geopolymer concrete designed by Taguchi method. Mater. Des. 36, 191–198 (2012).
Hadi, M. N. S., Farhan, N. A. & Sheikh, M. N. Design of geopolymer concrete with GGBFS at ambient curing condition using Taguchi method. Constr. Build. Mater. 140, 424–431 (2017).
Yahya, Z. et al. Effect of solids-to-liquids, Na2SiO3-to-NaOH and curing temperature on the palm oil boiler Ash (Si + Ca) geopolymerisation system. Materials 8, 2227–2242 (2015).
IS 1199. : Methods of Sampling and Analysis of Concrete. (1959).
IS 516 (Part1/Sect. 1). Hardened Concrete - Methods of Test - Compressive, Tensile and Flexural Strength. vol. 54 (2021). (2021).
ASTM C 1585-04 Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes. www.astm.org.
ASTM C1202-22. Standard test method for electrical indication of concrete’s ability to resist chloride ion penetration. 1–8 (2012). https://doi.org/10.1520/C1202-22E01.2
Wang, G., Kong, Y., Sun, T. & Shui, Z. Effect of water-binder ratio and fly Ash on the homogeneity of concrete. Constr. Build. Mater. 38, 1129–1134 (2013).
Heshmat, M., Amer, I., Elgabbas, F. & Khalaf, M. A. Effect of binder and activator composition on the characteristics of alkali-activated slag-based concrete. Sci Rep 14, (2024).
Fang, G., Ho, W. K., Tu, W. & Zhang, M. Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature. Constr. Build. Mater. 172, 476–487 (2018).
Banchhor, S., Murmu, M. & Deo, S. V. Evaluating the performance of alkali activated concrete with fly ash, lime and GGBS. Int. Rev. Appl. Sci. Eng. 14, 263–269 (2023).
Yusslee, E. & Beskhyroun, S. The effect of water-to-binder ratio (W/B) on pore structure of one-part alkali activated mortar. Heliyon 9, e12983 (2023).
Lv, Y., Wang, C., Han, W., Li, X. & Peng, H. Study of the mechanical properties and microstructure of Alkali-Activated fly Ash–Slag composite cementitious materials. Polymers (Basel) 15, (2023).
Shilar, F. A. et al. Optimization of alkaline activator on the strength properties of geopolymer concrete. Polymers (Basel) 14, (2022).
Chen, M. et al. The effects of solid activator dosage and the liquid-solid ratio on the properties of FA-GGBS based one-part geopolymer. Constr Build. Mater 463, (2025).
IS 456:2000. Indian standard Plain and reinforced concrete-. Bureau Indian Stand. (BIS) New. Delhi. 31, 1–127 (2021).
Haruna, S. et al. Long-term strength development of fly ash-based one-part alkali-activated binders. Materials 14, (2021).
Poojalakshmi, E. S., Nagarajan, P., Sudhakumar, J. & Thomas, B. S. Impact of alkaline activator concentration on mechanical properties and microstructure of a ternary blended one-part geopolymer cement. Sci Rep 15, (2025).
Law, D. W., Adam, A. A., Molyneaux, T. K. & Patnaikuni, I. Durability assessment of alkali activated slag (AAS) concrete. Mater. Structures/Materiaux Et Constructions. 45, 1425–1437 (2012).
Kamath, M., Prashant, S. & Kumar, M. Micro-characterisation of alkali activated paste with fly ash-GGBS-metakaolin binder system with ambient setting characteristics. Constr. Build. Mater. 277, 122323 (2021).
Hamsashree, Souza, S. S. D., Pandit, P. & Kumar, Y. M. A. Feasibility study of using wash water on workability, mechanical properties and durability of alkali-activated concrete. Discover Appl. Sciences 7, (2025).
Bekkeri, G. B., Shetty, K. K. & Nayak, G. Producing of alkali-activated artificial aggregates by pelletization of fly ash, slag, and seashell powder. Innovative Infrastructure Solutions. 8, 1–23 (2023).
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FundingOpen access funding provided by Manipal Academy of Higher Education, Manipal.
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The study was designed with contributions from all authors. **Prabhu Gurunathappa Sheelavantar: ** Conceptualization, Methodology, Validation, Formal analysis, Investigation, Writing - original draft, Visualization. **Poornachandra Pandit: ** Conceptualization, Methodology, Writing – review & editing, Supervision. **Shreelaxmi Prashant: ** Conceptualization, Methodology, Writing – review & editing, Supervision. Finally, all authors reviewed and approved the final document.
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Sheelavantar, P.G., Pandit, P. & Prashant, S. Performance evaluation and TiGRA-based multi-response optimization of sustainable fly ash-slag-based one-part alkali-activated concrete mix design. Sci Rep (2026). https://doi.org/10.1038/s41598-025-34746-1
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DOI: https://doi.org/10.1038/s41598-025-34746-1
