**4. Conclusions**


hydrates, the specimen has a better density, and the decrease in weight loss rate is not obvious at a later stage.

8. Under the condition of a W/B ratio of 0.4, the addition of 2% waste PE and 20% GGBFS in the mix proportion leads to better hardening properties and durability to achieve the goal of waste reuse. In addition, it suggests the appropriate PE addition ratio for the reference of concrete mixture proportioning design, so as to achieve waste minimization by recycling PE film on the surface of disposable containers.

**Author Contributions:** Conceptualization, K.-T.L., C.-C.H., and H.-Y.W.; methodology, H.-Y.W.; formal analysis, K.-T.L.; resources, C.-C.H.; data curation, F.-L.W.; writing—original draft preparation, K.-T.L.; writing—review and editing, C.-C.H.; supervision, H.-Y.W. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Data Availability Statement:** Not applicable.

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