Ached the maximum worth. Compared with NR , the 7 d and 28 d flexural RO5166017 web strength of NaR had an average raise of 42.three and 36.four , re(c) (d) spectively; those of SaR had a rise of 41.0 and 29.five , respectively; although these had three. Make contact with Figure three. Contactof WaR Figurepowder. angle of rubber powder.3.1 respectively. (Figure 4) angle of rubberonly a rise of 7.four andIt may be noticed from the Figure 3a above that the get in touch with angles from the NR specimen and also the WaR specimen have been 106.13and 97.31 4-Methylbenzylidene camphor In Vitro respectively, each greater than NR-M 20 NR-M WaR-M 90 At this moment, the surface in the specimen was within a hydrophobic state. By comparWaR-M 18 NaR-M NaR-M ison, the make contact with angles of NaR and SaR were 79.15and 54.07 respectively, indiSaR-M 16 SaR-M cating that the surface on the rubber powder had changed from hydrophobic to hydro14 philic. Overall, the contact angle of SaR was the smallest, implying that SaR has the 12 best hydrophilic overall performance.28d Flexural strength/MPa107d Flexural strength/MPa3.2. Mechanical Properties0 06 Mechanical efficiency is the most significant indicator from the modification effect. Figures 5 and six show the influence of4different rubber powder modification techniques and rubber contents around the 7 d and 28 d flexural strength and compressive strength of magne2 sium oxychloride cement, respectively.Rubber powder content/Rubber powder content/(a)generally exactly the same trend. 3.two.two. Compressive Strength(b)Figure four.Figure four.dThe (a) 7strength andstrengthflexural strength with the R specimen showed specimen showed The (a) 7 flexural d flexural (b) 28 d and (b) 28 d flexural strength of your R fundamentally the identical trend.It may be 3.2.2. Compressive Strength observed from Figure five that the 7 d and 28 d compressive strengths with the RIt might be seen from Figurecompressive strength below all modification techniques exhibited an inders added, the five that the 7 d and 28 d compressive strengths on the R specimen showed fundamentally the sameby a decreasing trend. The compressive strength of NaR was creasing trend followed trend. With an increase on the level of rubberspecimen showed generally the same trend. With a rise of your level of rubber pow-greater than that of B when the quantity of rubber powders added was significantly less than 20 ; the compressive strength of SaR was much more substantial than that of B when the volume of rubber powders added was much less than 15 . In the viewpoint on the modification method, NaR appeared to become the ideal selection, followed by SaR , while WaRCrystals 2021, 11,7 ofpowders added, the compressive strength beneath all modification strategies exhibited an rising trend followed by a decreasing trend. The compressive strength of NaR was greater than that of B when the amount of rubber powders added was less than 20 ; the compressive strength of SaR was much more considerable than that of B when the volume of rubber powders added was much less than 15 . From the perspective with the modification strategy, NaR appeared to be the very best solution, followed by SaR , whilst WaR and NR had been not considerably various. When the addition volume of rubber powders was 10 , the compressive strength reached the maximum value. Compared with NR , the 7 d and 28 d compressive strength of NaR showed an average increase of 63.1 and 37.three , Crystals 2021, 11, x FOR PEER Overview respectively; these of SaR showed an increase of 29.five and 23.five , respectively, while those of WaR showed only an increase of 7.7 and four.8 , respectively.908 of70 60 50 40 30 20 ten 0.