Issue 66

S.E. Daguiani et alii, Frattura ed Integrità Strutturale, 66 (2023) 88-111; DOI: 10.3221/IGF-ESIS.66.05

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(c) Figure 9: (a) Correlation curve between the observed (experimental) results and the expected results for final setting time; (b) Residue vs. expected final setting time; (c) Iso-response curve for final setting time. Soundness The soundness of cement refers to the stability of the volume change in the setting and hardening process. From Tab. 4, we can notice that the probability of the model, as expressed in eq.9, is close to 0, and the R 2 shows a relatively high correlation coefficient close to 1. These results indicate a good performance of the soundness model. The correlation curve between the observed results of soundness and the predicted results, as well as the graphical representation of residuals and the soundness iso-response curve, are shown in Figs. 10 (a),(b), and (c), respectively. It can be noticed that the soundness of pastes is subordinate first by the increase in the dosage of GGBS, followed by the dosage of PC and WGP, then by the coupled effect of (WGP-GGBS), followed by (PC-WGP) and, finally, by the impact of (PC-GGBS). The test results for the soundness of pastes prepared in different proportions have shown an average value

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