Um with melamine.Figure 21. Cont.Coatings 2021, 11,20 ofFigure 21. Evaluation area and results for the compound containing polycarbonate salts with calcium sulfate, displaying the common sample region and X-ray spectrograph (supply: the author): (a) micrograph of gypsum with polycarbonate salts; (b) chemical composition; (c) chemical composition of gypsum with polycarbonate salts.Figure 22. Analysis region and final results for the compound containing calcium sulfate with polycarboxylate. Displaying the general sample region and X-ray spectrograph (source: the author): (a) micrograph of gypsum with policarboxylate; (b) chemical composition; (c) chemical composition of gypsum with polycarboxylate.Coatings 2021, 11,21 ofFigure 23. Analysis region and benefits for the citric acid compound with calcium sulphate, showing the common sample location and X-ray spectrograph (supply: the author): (a) micrograph of gypsum with citric acid; (b) chemical composition; (c) chemical composition of gypsum with citric acid.five. Conclusions All of the bases tested enhanced and modified the mechanical properties (bending strength, compressive strength, and Shore C hardness) in the mortar (plaster) as in comparison with the reference without having additives in the identical water/plaster (W/P) ratio, giving greater workability (higher fluidity and longer setting time). The Shore C hardness values in all tests exceeded 80 units. The Shore C hardness index values decreased drastically as we enhanced the Chlortoluron Protocol proportions of additives in the mortars. The most effective mechanical resistance final results with regards to flexural strength and compressive strength have been obtained with melamine compounds, whose values were nicely above the minimum values needed by the regulations, while by far the most damaging aspect was the setting instances, which varied from 3 to 7 min, depending on the percentage of additive used; around the contrary, the setting occasions for the polycarboxylates, citric acid, and polycarbonate salts improved significantly, based on the proportion in the mixture, reaching values of up to 117.58 min. Each melamines and synthetic melamine polymers offered excellent outcomes with regards to compressive strength (99 N/mm2 ) and flexural strength (three.55.88 N/mm2 ), as did naphthalenes when it comes to compressive strength (13.884.39 N/mm2 ) and bending (3.83.61 N/mm2 ). These benefits had been much higher than the rest with the test compounds. Citric acid showed stable behaviour and was close to naphthalene with regards to its compressive strength (7.93.77 N/mm2 ) and bending (three.15.83 N/mm2 ) values.Coatings 2021, 11,22 ofComparing the outcomes with the distinctive additives utilised in these tests with other revolutionary additives that can be RPR 73401 Autophagy discovered now on the marketplace, which include graphene powder, which may be made use of as an additive in gypsum [26], it could be noticed that the bending resistance values for the additives tested have been in line with all the flexural resistance values, with these values becoming greater than these essential by the regulations. The setting time was inversely proportional to the mechanical resistance of your calcium sulfate additive, so by increasing the setting time the mechanical resistance from the plaster was decreased, although its values had been generally above the minimum essential by the current regulations.Author Contributions: Conceptualization, J.A.F.Y., L.M.S.J. and J.J.P.P.; methodology, J.A.F.Y., L.M.S.J. and J.J.P.P.; software, A.M.G. as well as a.M.C.A.; validation, J.A.F.Y., L.M.S.J. and J.J.P.P.; formal evaluation, J.A.F.Y. and L.M.S.J.; investigation, J.A.