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  The two -component grouta double approach for the Young’s modulus assessment

  The two-component grout is nowadays the most widely used technology in mechanized shielded tunneling for the backfilling process. Despite its wide use, very little information is currently available on the study of its mechanical properties and their evolution as a function of the curing time. Furthermore, in several construction sites the need has recently emerged to verify the compliance of the twocomponent grout with the technical specifications, also considering new mechanical parameters such as, for example, the elastic modulus. This work is focused on determining the Young’s modulus with respect to a real used two-component mix design. The EN technical standard was applied, followed by a geophysical approach. Preliminary results are presented and discussed.

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