Sulfate resistance testing of shotcrete – Sample preparation in the field and under laboratory conditions

When shotcrete is in contact with sulfate containing ground water, there a risk of drastically reduced service life. In this case, the use sulfate-resisting cement recommended. Since physical characteristics matrix differ from conventional concrete, cements do not always guarantee sufficient durability. Thus, testing resistance accelerated tests necessary. Providing test samples on-site (real) time consuming and demanding. study, properties such as compressive strength transport produced laboratory without spraying are compared to field samples. A new compaction method proposed, which apt allow high accelerator dosages. For different alkali-free set-accelerators types, laboratory-produced only reveal similar results shotcrete, but also exhibit comparable porosity, chemical phase assemblage.