PSI - Issue 70

C. Raghu Rami Reddy et al. / Procedia Structural Integrity 70 (2025) 223–230

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• The combined use of silica fume and PP fibers proved to be the most effective approach for enhancing both mechanical and microstructural properties of foamed concrete, supporting its suitability for structural and non-structural applications.

Fig 3. SEM images showing (a) metakaolin, (b) silica fume, (c) fly ash agglomerated on fine aggregate, (d) unruptured foam bubble, (e) polypropylene fiber, and (f) spherical fly ash particle References Amran, Y. H. M., Farzadnia, N., & Ali, A. A. A. 2015. Properties and applications of foamed concrete: A review. Construction and Building Materials, 101, 990 – 1005. https://doi.org/10.1016/j.conbuildmat.2015.10.112 ASTM International. 1997. ASTM C796-97: Standard test method for foaming agents. ASTM International Bureau of Indian Standards. (1959). IS 516-1959: Method of tests for strength of concrete. BIS. Chen, X., Wang, L., & Zhou, J. 2025. Nano-scale enhancement of foamed concrete with silica fume: Microstructural and mechanical insights. Journal of Building Engineering, 82, 108345. https://doi.org/10.1016/j.jobe.2024.108345.