FZALFresnel Zone Acoustic Lens
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The decrease in flexural strength of CZAL in comparison with FZAL is partially due to zeolite-paste interface fragility, especially evident in the bigger particles, following a rupture scheme similar to that of common aggregate/binder interface.
The upward trend in E values with age is evident in AL, FZAL and CZAL mortars (Fig.
Reference Materials AL air lime + sand FSAL fine sepiolite + air lime + sand CSAL coarse sepiolite + air lime + sand FZAL fine zeolite pellet + air lime + sand CZAL coarse zeolite pellet + air lime + sand Table 2 Chemical analyses of materials used for mortars preparation.