PSI - Issue 33

Michal Vyhlídal et al. / Procedia Structural Integrity 33 (2021) 966–981 Vyhlídal et al./ Structural Integrity Procedia 00 ( 2019) 000 – 000

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character. The specimens with marble inclusions are different; there are large portlandite crystals in many places, and the CSH and CAH phases have a less porous structure. Given that the used inclusions do not contain components that tend to react with hardened cement, such as pozzolans, or form new phases in the ITZ, the adhesion probably results from the surface roughness of the inclusions. This property of the inclusions and the adhesion of the hardened cement to their surface have not yet been measured; they will be the subject of further research.

Fig. 8. Microstructure of the amphibolite – matrix interface characterized by SEM via the detection of secondary electrons.

Fig. 9. Microstructure of the basalt – matrix interface characterized by SEM via the detection of secondary.