Ial hardening occasions, REF UPV for the mortars served inthan thestudied. With respect towards the mortars later ages, themortars at those early which the binary binders S and F presentedrespect totime, mortars this Compound 48/80 In Vitro parameter than the at ages, incorporate active additions general slight higher while having a comparatively slow UPV than the other series studied. With rose with thevalues of with active additions, price. early ages, SF, parameter At later and Fthe within the long-term for reference of this ternary binders the binary binders S ages, presented the mortars which incorporate those In contrast, thisSL, and FL. slightly decreasedUPV for slight higher valuesmortars.paAt 250 days, the UPV wasbindersfor S SL, and FL.withlater ages, theones. Furthermore, for active than the overall higher time, despite the fact that At a comparatively slow price. In contrast, rameter additions ternaryrose withSF, and F series in comparison with REF UPV for the mortars the tested ternary active additions general rose with time, equivalent to using a 250 mortars. this incorporate binders (SF, SL, the FL series), it was despite the fact that reference days, the whichparameter slightly decreased inand long-term for reference mortars. At fairly slow UPV the studied hardening time, the lowest values of UPV parameter reference for L Duringcontrast, this S and F series in comparison to REF inside the Moreover, for the tested ternary rate. Inwas larger for parameter slightly decreased ones. long term forwere notedmortars. binders mortars. (SF, SL, and FL series), it was related to reference mortars. Throughout the studied At 250 days, the UPV was greater for S and F series when compared with REF ones. In addition, for hardening time, the lowest values of UPV parameter had been noted for L mortars. the tested ternary binders (SF, SL, and FL series), it was comparable to reference mortars. Through the studied hardening time, the lowest values of UPV parameter have been noted for L REF mortars.L S F SL REF SF L FL S4600 4800 4400 4600 4200 4400 4000 4200F SL SF FLHardening age, days4000 0 50 100 150 200Decanoyl-L-carnitine Biological Activity Figure 9. Ultrasonic pulse velocity benefits for the analyzed binders. Figure 9. Ultrasonic pulse velocity results for the analyzed binders.Hardening age, daysFigure 9. Ultrasonic pulse velocity results for the analyzed binders.Materials 2021, 14,11 of4. Discussion 4.1. Microstructure Characterization Firstly, in relation to total porosity final results (see Figure 1), the scarce variations at 28 days in this parameter between the various mortars analyzed may be associated for the environmental relative humidity (RH) in the exposure place of the samples. As was explained in Section 2.two, the average RH registered inside the exposure station was inside the variety 650 . This RH was somewhat higher, despite the fact that it was reduced than the RH of an optimum standardized laboratory situation (9500 ). Consequently, this reduced RH within the atmosphere could influence the slag and clinker hydration reactions [39,65], simply because they will need the presence of water to be created [66,67]. Then, having a lower availability of water inside the atmosphere, these hydration reactions would slow down [19,39,65], giving because of this that the total porosity variations were less noticeable inside the quick term comparing the binders analyzed. In addition, this could impact the binders with fly ash also, because the improvement of pozzolanic reactions of fly ash could also be slowed down by a decrease environmental RH [68,69], inside a related strategy to that explained for slag and clinker hydration [19,39,65]. Moreover, the.