**4. Conclusions**

This research examined the impact of BF on a geopolymer based on FA and filled with waste BP. The following summarizes the findings of the tests conducted:


**Author Contributions:** Conceptualization, M.Z., S.E., Y.T., S.K. and R.A.G.L.; methodology, M.Z., S.E., Y.T., S.K.; formal analysis, M.Z., S.E., Y.T., S.K.; investigation, M.Z., S.E., Y.T., S.K.; resources, M.Z., S.E., Y.T., S.K., R.A.G.L.; data curation, M.Z., S.E.; writing—original draft preparation, M.Z., S.E., Y.T., S.K.; writing—review and editing, M.Z., S.E. and R.A.G.L.; visualization, M.Z., S.E., Y.T., S.K., S.E.; supervision, R.A.G.L.; project administration, M.Z., S.E., Y.T., S.K., R.A.G.L.; funding acquisition, R.A.G.L. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors wish to thank CEU San Pablo University Foundation for the funds dedicated to the Project Ref. MCP21V12 provided by CEU San Pablo University.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.

**Conflicts of Interest:** The authors declare no conflict of interest.
