**5. Conclusions**

The current study focuses on the assessment of HPSCC through an experimental program including 14 major performance tests that have mostly been used individually in the previous studies, and concluding improvement of some concrete properties, while some properties questionably remained if they were improved or worsened. A comparative and comprehensive study on the HPSCC can guarantee and answer that, what will happen to other properties. It was intended to apply the hexagonal model to some experimental studies in the literature, while the multi-parameter experiments (workability, cost, strength, and durability) can hardly or never be found. Therefore, it is of great interest to investigate such a type of comprehensive experiments. Based on the results and discussion, the following conclusions can be drawn:


Even though this study considered the main parameters of concrete such as technical properties and cost, further studies are still required on this path since the optimization (final outputs) was made based on 1 m3 of concrete. Therefore, further studies on the mentioned parameters must be done by considering the real structural application such as beam and column.

**Author Contributions:** Conceptualization, G.H.A.; methodology, G.H.A., H.A., B.A. and R.A.; software, G.H.A., H.A., B.A. and R.A.; validation, G.H.A., H.A., B.A. and R.A.; formal analysis, G.H.A., H.A., B.A. and R.A.; investigation, G.H.A., H.A., B.A. and R.A.; resources, G.H.A., H.A., B.A. and R.A.; data curation, G.H.A.; writing—original draft preparation, G.H.A.; writing—review and editing, H.A., B.A. and R.A.; visualization, G.H.A., H.A., B.A. and R.A.; supervision, G.H.A., H.A., B.A. and R.A.; project administration, G.H.A., H.A., B.A. and R.A.; funding acquisition, R.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Deanship of scientific research, Prince Sattam bin Abdulaziz University, grant number No. 2020/01/16810.

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

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** No new data were created or analyzed in this study. Data sharing is not applicable to this article.

**Acknowledgments:** This publication was supported by the Deanship of Scientific Research, Prince Sattam bin Abdulaziz University under research project No. 2020/01/16810.

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

#### **References**


*Article*
