Application of RSM in optimizing the density and strength of lightweight concrete using EPS solution

Authors

  • Tran Trung Hieu Faculty of Natural Sciences Education, Sai Gon University, 273 An Duong Vuong St, Cho Quan Ward, Ho Chi Minh City, 700000, Vietnam Author
  • Nguyen Chi Cong Faculty of Natural Sciences Education, Sai Gon University, 273 An Duong Vuong St, Cho Quan Ward, Ho Chi Minh City, 700000, Vietnam Author
  • Nguyen Ngoc Truc My Faculty of Natural Sciences Education, Sai Gon University, 273 An Duong Vuong St, Cho Quan Ward, Ho Chi Minh City, 700000, Vietnam Author
  • Thai Thi Kim Ngan Faculty of Natural Sciences Education, Sai Gon University, 273 An Duong Vuong St, Cho Quan Ward, Ho Chi Minh City, 700000, Vietnam Author
  • Bui Thi Hoa Faculty of Natural Sciences, Electric Power University, 235 Hoang Quoc Viet St, Nghia Do Ward, Hanoi City, 100000, Vietnam Author https://orcid.org/0009-0009-3249-3739
  • Bui Xuan Vuong Faculty of Natural Sciences Education, Sai Gon University, 273 An Duong Vuong St, Cho Quan Ward, Ho Chi Minh City, 700000, Vietnam Author https://orcid.org/0000-0002-3757-1099

DOI:

https://doi.org/10.62638/ZasMat1699

Abstract

This work addresses the challenge of balancing low density and adequate strength in Lightweight Concrete (LWC) by proposing a novel approach using an Expanded Polystyrene (EPS) adhesive solution instead of conventional beads. This solution acts as both a lightweight agent and an auxiliary binder, effectively overcoming issues like buoyancy, segregation, and weak interfacial bonding. Incorporating the solution after cement paste formation ensured uniform dispersion and enhanced material homogeneity. Response Surface Methodology (RSM) was used to evaluate the interactive effects of W/C (water to cement mass ratio), S/C (sand to cement mass ratio), and EPS volume fraction on compressive strength and density. The optimization yielded a maximum desirability (D=1.000). The optimal mixture (W/C =0.46, S/C = 1.76, EPS = 38.65%) predicted a compressive strength of 10.64 MPa and a density of 939.2 kg/m3. Experimental validation under rounded conditions (10.4 MPa and 935 kg/m3) confirmed the model's reliability, demonstrating a successful balance suitable for non-load-bearing applications.

Keywords:

Lightweight concrete (LWC), EPS adhesive solution, RSM, CCD, density, compressive strength, mixture optimization

References

K. Srinivas, R. A. Krishma, V. Mahesh (2021) Experimental investigation on lightweight concrete by replacing the coarse aggregate with coconut shell and expanded polystyrene beads and using polypropylene fiber,Mater. Today Proc., 15(1), 838-842. https://doi.org/10.1016/j.matpr.2020.12.834 DOI: https://doi.org/10.1016/j.matpr.2020.12.834

V. K. Kumar, A. K. Priya, G. Manikandan, A. S. Nitishkumar,P. Pradeep(2021)Review of materials used in lightweight concrete,Materials. Today Proc., 37(2),3538-3539. https://doi.org/10.1016/j.matpr.2020.09.425 DOI: https://doi.org/10.1016/j.matpr.2020.09.425

L. Prasittisopin, P. Termkhajornkit, Y. H. Kim (2022) Review of concrete with expanded polystyrene (EPS): Performance and environmental aspects, J. Clean. Prod., 366, 132919. https://doi.org/10.1016/j.jclepro.2022.132919 DOI: https://doi.org/10.1016/j.jclepro.2022.132919

K. G. Babu, D.S.Babu (2003) Behaviour of lightweight expanded polystyrene concrete containing silica fume, Cem. Concr. Res., 33, 755-762. https://doi.org/10.1016/S0008-8846(02)01055-4 DOI: https://doi.org/10.1016/S0008-8846(02)01055-4

B. Chen, J.Liu (2004) Properties of lightweight expanded polystyrene concrete reinforced with steel fibers, Cem. Concr. Res., 34(7), 1259-1263. https://doi.org/10.1016/j.cemconres.2003.12.014 DOI: https://doi.org/10.1016/j.cemconres.2003.12.014

Y. Xu, L. Jiang, J. Xu,Y. Li (2012) Mechanical properties of expanded polystyrene lightweight aggregate concrete and brick, Constr. Build. Mater., 27, 32-38. https://doi.org/10.1016/j.conbuildmat.2011.08.030 DOI: https://doi.org/10.1016/j.conbuildmat.2011.08.030

N. Liu,B. Chen (2014) Experimental study of the influence ofEPS particle size on the mechanical properties of EPS lightweight concrete, Constr. Build. Mater., 68(15), 227-232. https://doi.org/10.1016/j.conbuildmat.2014.06.062 DOI: https://doi.org/10.1016/j.conbuildmat.2014.06.062

A. E. Mir, E. Fayad, J. J. Assaad, H. E. Hassan (2023) Multi-response Optimization of Semi-lightweight Concrete Incorporating Expanded Polystyrene Beads,Sustainability., 15(11), 1-16. https://doi.org/10.3390/su15118757 DOI: https://doi.org/10.3390/su15118757

BS EN 12390-3 (2019) Testing hardened concrete – Part 3: Compressive strength of test specimens, London.

R. Othman, R. P. Jaya, K. Muthusamy, M. Sulaiman, Y. Duraisamy, M. M. A. B. Abdullah, A. Przybyl, W. Sochacki, T. Skrzypczak, P. Vizureanu,A. V. Sandu (2021) Relation between density and compressive strength of foamed concrete,Materials., 14(11), 1-22. https://doi.org/10.3390/ma14112967 DOI: https://doi.org/10.3390/ma14112967

T. Zerig, M. Belachia, A. Aidoud, N. Meftah, T. Djedid,M. Abbas (2024) Statistical analysis using the RSM approach of the physical behavior of green polymerized eco-mortar, J. Clean. Prod., 450, 141858. https://doi.org/10.1016/j.jclepro.2024.141858 DOI: https://doi.org/10.1016/j.jclepro.2024.141858

M. K. Alkharisi, H. A. Dahish (2025) The Application of Response Surface Methodology and Machine Learning for Predicting the Compressive Strength of Recycled Aggregate Concrete Containing Polypropylene Fibers and Supplementary Cementitious Materials,Sustainability.,17,1-28. https://doi.org/10.3390/su17072913 DOI: https://doi.org/10.3390/su17072913

N. Ganasen, L. Krishnaraj, K. C. Onyelowe, G. U. Alaneme, O. N. Out (2023) Soft computing techniques for predicting the properties of raw rice husk concrete bricks using regression-based machine learning approaches, Sci. Rep., 13,1-22. https://doi.org/10.1038/s41598-023-41848-1 DOI: https://doi.org/10.1038/s41598-023-41848-1

D. Sinkhonde, R. O. Onchiri, W. O. Oyawa,J. N. Mwero (2021) Response surface methodology-based optimisation of cost and compressive strength of rubberised concrete incorporating burnt clay brick powder,Heliyon., 7(12), e08565. https://doi.org/10.1016/j.heliyon.2021.e08565 DOI: https://doi.org/10.1016/j.heliyon.2021.e08565

M. S. Khan, A. Ulhad, D. M. Alsekait, M. F. Javed, M. Jameel, H. Alabduljabbar,D. S. Abdelminaam (2025) RSM-based optimization of recycled aggregate concrete with pozzolanic materials under high temperatures, Front. Mater.,12,1-21. https://doi.org/10.3389/fmats.2025.1601597 DOI: https://doi.org/10.3389/fmats.2025.1601597

K. Siamardi (2022) Optimization of fresh and hardened properties of structural light weight self-compacting concrete mix design using response surface methodology, Constr. Build. Mater., 317,125928. https://doi.org/10.1016/j.conbuildmat.2021.125928 DOI: https://doi.org/10.1016/j.conbuildmat.2021.125928

T. R. Gyawali (2023) Effect of the mixing procedure on the properties of lightweight EPS mortar, J. Build. Eng.,68,106012. https://doi.org/10.1016/j.jobe.2023.106012 DOI: https://doi.org/10.1016/j.jobe.2023.106012

S. E. Gamal, Y. A. Jardani, M. S. Meddah, K. A. Sohel,A. A. Saidy (2023) Mechanical and thermal properties of lightweight concrete with recycled expanded polystyrene beads, Eur. J. Environ. Civ. Eng., 28(1), 80-94. https://doi.org/10.1080/19648189.2023.2200830 DOI: https://doi.org/10.1080/19648189.2023.2200830

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Published

09-06-2026

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