## 4 Conclusions  
The present work shows the experimental plan and the results obtained when incorporating bioceramics into construction materials. Bioceramics were used as additives, in different percentages, to the generation of new gypsum plasters and cement mortars in order to study their effect on the physical and mechanical properties of these materials. The results obtained from the experimental plan on gypsum mixtures showed that the addition of bioceramics contributed to improving the mechanical properties of the mixtures (flexural and compressive). The greatest increases were achieved by incorporating 1% bioceramics into the plaster matrix, which allowed them to increase their flexural strength by 3% and, notably, their compressive strength, related to the reference sample, by up to 21%. Regarding its physical properties, the addition of bioceramics by 1% slightly increased  
Figure 13: Normalized intraparticle volume vs. pore size histogram in low and high pressure. Intraparticle porosity is shown in red: (**a**) Reference at low pressure; (**b**) MBC-0.4 at low pressure; (**c**) Reference at high pressure; (**d**) MBC-0.4 at high pressure.  
the density of the material. Finally, the microscopy tests revealed that a more compact matrix was achieved when bioceramics were used as an additive in the plasters.  
On the other hand, the results obtained for the cement mortars showed that the incorporation of bioceramics into the mixtures produced alterations in their physical and mechanical properties. In this case, contrary to the results obtained for the gypsum plasters, the addition of bioceramics reduced the density of the resulting mortars. Likewise, it contributed to reducing the absorption of water by the capillarity of the mortars (up to 24%) and notably reduced its porosity, as it was reflected in the results obtained from the mercury porosimetry carried out on the CBC-0.4 sample (77% in tests at low pressure and 55% at high pressure). These results can be related to the microscopy images obtained in the plaster mortars, in which a more compact matrix (with fewer pores) was also observed when bioceramics were used as an aggregate. Regarding the mechanical properties of the cement mortars, the addition of bioceramics to these mortars, in a percentage of 0.4%, allowed to improve both the flexural and compressive strength of the new mortars.  
In conclusion, the studies carried out on these materials allow us to deduce that the addition of bioceramics on gypsum plasters, and/or cement mortars, produced alterations in the internal structure of these materials, as it can be seen in the optical microscopy images as well as in the results of the mercury porosimetry. These modifications caused a reduction in the particle size of the materials, which led to a reduction in their porosity and, therefore, on their absorption capacity. These results could have a great relevance to the composites. The changes produced in the internal structure of the materials could positively affect their durability, a fact that will be studied in upcoming researches.  
F.P.-G.: conceptualization, writing--review and editing. M.J.M.-C.: writing--original draft, writing--review and editing, formal analysis. M.A.P.-R.: writing--original draft, writing--review and editing. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The authors declare no conflict of interest.