Abstract

The increase in construction work has made a lot of construction and demolition waste that causes environmental and disposal problems. One way to deal with the growing amount of demolition concrete waste in a sustainable way is to use it again as aggregate in new concrete, but this is usually limited due to lower workability and damage to mechanical properties. Solving these problems is important to encourage environmentally friendly and structurally sound manufacturing of concrete. The main goal of the study is to use demolition concrete waste as coarse aggregate in concrete after studying the possibility and to check how well the PC-200 superplasticizer will work to improve the mechanical and fresh properties of concrete made using it. To achieve this goal, concrete samples were made with different amounts of replacement of natural coarse aggregate with demolition waste concrete, the replacement levels being 0, 25, 50, 75, and 100%. Two categories of mixes were included in this study: ordinary concrete with a 0.42 water–cement ratio and modified concrete containing PC-200 superplasticizer with low water–cement ratio of 0.28. The tests included the slump test, compressive strength, splitting tensile and flexural strength, and modulus of elasticity after 28 days of curing. The test results showed reduced workability and mechanical strength of ordinary concrete mixes with the introduction of demolition waste aggregates. High levels of modification with PC-200 superplasticizer showed significant improvement in the fresh and hardened properties. Compressive strength increase from 43.1 MPa for the reference modified mix to 52.5 MPa for the 100% waste aggregate. Similar improvements were also observed in the tensile and flexural strength as well as modulus of elasticity. The results indicate that demolition waste aggregates can be successfully used to produce high performance sustainable concrete for structural applications, given the right level of modification.

Keywords

Demolition concrete waste, Superplasticizer, Sustainable concrete, Mechanical properties, Environmental, Structural Applications,

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References

  1. A.C. Freire, I. Martins, C. Ferreira, E. Correia, J. Neves, A. Roque, E. Fortunato, A. Paixão, S. Rios, (2026) Use of construction and demolition waste and steel slag. Transportation Geotechnics for Green, Digital, and Modern Infrastructures, CRC Press. https://doi.org/10.1201/9781003530220-5
  2. J.S. Sudarsan, S. Vaishampayan, V. Srihari, H. Gavali, Optimizing construction waste management: A study on recycling practices in residential building projects. Clean Technologies and Environmental Policy, 28(2), (2026) 54. https://doi.org/10.1007/s10098-025-03365-9
  3. R.K. Sakthibala, P. Vasanthi, C. Hariharasudhan, P. Partheeban, A critical review on recycling and reuse of construction and demolition waste materials. Cleaner Waste Systems, 12, (2025) 100375. https://doi.org/10.1016/j.clwas.2025.100375
  4. Y. Song, J. Feng, F. Wang, S. Wu, H. Xu, Advanced and sustainable approach for large-scale, high-quality recycling of predominant pavement waste and its life cycle environmental impact assessment. Environmental Impact Assessment Review, 118, (2026) 108263. https://doi.org/10.1016/j.eiar.2025.108263
  5. C. Cascioli, L. Castagnini, A. Morri, L. Ceschini, Improving the performance of recycled EN 45500: A sustainable approach through heat treatment optimization. Journal of Cleaner Production, 544, (2026) 147718. https://doi.org/10.1016/j.jclepro.2026.147718
  6. A. Islam, E. Rashid, T.A. Kanon, R. Khan, B. Uddin, N. Islam, H. Rahman, A. W. Fahim, R. Uddin, S. Ray, Y. Khan Rijuan, M. Haque, Upcycling colored brush fiber waste through siro yarn production: A sustainable approach to reduce environmental impact in textile manufacturing. Cleaner Waste Systems, 13, (2026) 100474. https://doi.org/10.1016/j.clwas.2026.100474
  7. J. Xiao, C. Yu, B. Wang, H. Liu, C.S. Poon, J. de Brito, X. Xiao, J. Liu, S.P. Shah, Recycled aggregate concrete design, application and challenges. Nature Reviews Clean Technology, 2, (2026) 67–83. https://doi.org/10.1038/s44359-025-00125-2
  8. A.A. Firoozi, A.A. Firoozi, Recycled aggregate concrete: A sustainable approach to concrete production. Recent Developments and Innovations in the Sustainable Production of Concrete, (2025) 415–459. https://doi.org/10.1016/B978-0-443-23895-6.00016-9
  9. A. Mandal, A. Shiuly, Exploring mechanical characteristics of recycled concrete aggregates from demolition waste: Advancements, challenges, and future directions for sustainable construction: A review. Discover Civil Engineering, 2(10, (2025) 33. https://doi.org/10.1007/s44290-025-00185-0
  10. Z. Jia, S. Cunha, J. Aguiar, C. Shi, Enhancing the durability of concrete with construction and demolition waste aggregate through its functionalization with phase change materials (paraffin). Cement and Concrete Composites, 162, (2025) 106135. https://doi.org/10.1016/j.cemconcomp.2025.106135
  11. P. Wang, B. Chen, A. Hashmi, X. Yao, J. Dong, Two-stage deterioration mechanisms in recycled aggregate concrete: From pore interface degradation to aggregate interface defect control. Buildings, 15(24), (2025) 4480. https://doi.org/10.3390/buildings15244480
  12. X. Xie, Y. Zheng, F. Lee, Y. Zeng, H. Wu, Y. Yang, S. Xu, (2026) Sound insulation and mechanical properties of recycled aggregate-rubber cement-based mortar with hierarchical porous heterogeneous structure. SSRN. https://dx.doi.org/10.2139/ssrn.6082133
  13. J. Rajprasad, A comprehensive review and evaluation of recycled aggregates as a sustainable construction material. Engineering Research Express, 8(4), (2026). https://doi.org/10.1088/2631-8695/ae3a35
  14. M. O. Kim, Can microplastics (MPs) replace conventional mineral aggregates? A brief review. Polymers, 18(4), (2026) 505. https://doi.org/10.3390/polym18040505
  15. M. AlSieedi, Z. Jiang, A. Al-Bodour, M. Atilhan, L. M. Colosi, G. Arce, O. E. Ozbulut, Influence of biochar feedstock and particle size on cementitious composites incorporating biochar as a partial cement replacement. Journal of Cleaner Production, 555, (2026) 148202. https://doi.org/10.1016/j.jclepro.2026.148202
  16. J. Jiang, H. Yang, M. Li, F. Chen, Y. Wang, Failure criterion and constitutive model of concrete incorporating recycled coarse aggregate subjected to true-triaxial compression after freeze-thaw cycles. Structures, 84, (2026) 111115. https://doi.org/10.1016/j.istruc.2026.111115
  17. E. Pahsha, R. Gupta, V. Agrawal, Evaluation of strength, durability, and environmental impact of self-compacting concrete incorporating ground-granulated blast-furnace slag, granite cutting waste, and recycled concrete aggregate. Arabian Journal for Science and Engineering, (2026) 1–23. https://doi.org/10.1007/s13369-026-11257-3
  18. R. Cherif, A. Bousleh, S.E.E. Khay, Sustainable sand concrete incorporating fine recycled aggregates for structural applications. Engineering Research Express, 8(1), (2026) 015101. https://doi.org/10.1088/2631-8695/ae2f24
  19. G.A. Junior, J.C. Leite, G.D.P. Mendez, A.N. Haddad, J.A. Silva, B.B. da Costa, A review of the characteristics of recycled aggregates and the mechanical properties of concrete produced by replacing natural coarse aggregates with recycled ones—fostering resilient and sustainable infrastructures,” Infrastructures, 10(8), 2025) 213. https://doi.org/10.3390/infrastructures10080213
  20. A. Alibeigibeni, F. Stochino, M. Zucca, F. L. Gayarre, Enhancing concrete sustainability: A critical review of the performance of recycled concrete aggregates (RCAs) in structural concrete. Buildings, 15(80, (2025) 1361. https://doi.org/10.3390/buildings15081361
  21. L. Prasittisopin, W. Tuvayanond, T.H.K. Kang, S. Kaewunruen, Concrete mix design of recycled concrete aggregate (RCA): Analysis of review papers, characteristics, research trends, and underexplored topics. Resources, 14(2), (2025) 21. https://doi.org/10.3390/resources14020021
  22. D.K. Ashish, H. Sharma, R. Maddalena, Recent advances in utilizing industrial wastes for enhanced concrete performance. Recent Trends in the Sustainability Improvement and Use of Wastes in Cementitious Materials, (2026) 131–148. https://doi.org/10.1016/B978-0-443-15670-0.00006-5
  23. Z. Shui, X. Chen, S. Cheng, R. Zhao, (2026) Development of an environment friendly ultra-high performance concrete containing recycled fine aggregates using magnesia expansive agents: Mechanical properties, shrinkage characteristics and microstructure. SSRN. https://dx.doi.org/10.2139/ssrn.6083049
  24. A. Raj, P. Yamkasikorn, A. Kunawisarut, C. Ngamkhanong, P. Jongvivatsakul, L. Prasittisopin, J. Panpranot, S. Kaewunruen, Enhancing recycled aggregate concrete with graphene quantum dots (GQDs): Refining wastes from construction demolitions and out-of-service railway sleepers. Developments in the Built Environment, 23, (2025) 100729. https://doi.org/10.1016/j.dibe.2025.100729
  25. G. Silva, M. Tudela, O. Rojas, C. Llontop, A. Perrot, R. Aguilar, Printable concrete with multi-source recycled aggregates: Particle packing design, rheological behavior, and 3D printing validation. Materials and Structures, 59(3), (2026) 169. https://doi.org/10.1617/s11527-026-03063-y
  26. S. Barbhuiya, B.B. Das, D. Adak, Effects of chemical admixtures on the properties of concrete. Binding Materials for Sustainable Construction, (2025) 329–362. https://doi.org/10.1016/B978-0-443-26566-2.00009-X
  27. A. Fatah, A.R. Prasetia, A. Dudi, S.M. Muhammad Afif, L. Azan Muzahab, (2025). The Use of Type D and Type F Admixtures Concrete and Their Effects on Setting Time and Compressive Strength. Journal of Social Research, 4(8), 1796-1808. https://doi.org/10.55324/josr.v4i7.2664
  28. Z. Jia, N. Li, S. Cunha, J. Aguiar, C. Zheng, Evaluation of the residual strength of concrete incorporating high quantity of functionalized recycled aggregates and free PCM exposed to elevated temperatures. Construction and Building Materials, 518, (2026) 145783. https://doi.org/10.1016/j.conbuildmat.2026.145783
  29. N.R. Pandjab, B. Bakri, M.A. Caronge, M.W. Tjaronge, N.H.A. Khalid, Exploratory study on fresh and hardened properties of mortar using recycled concrete powder towards environmental impact assessment. Next Materials, 11, (2026) 101994. https://doi.org/10.1016/j.nxmate.2026.101994
  30. B.R. Rashmi, R. Hemanth, A comparative study of two-stage mixing concrete against nominal mixing concrete. E3S Web of Conferences, 702, (2026) 06003. https://doi.org/10.1051/e3sconf/202670206003