engleski

TUNNEL REPAIR USING HIGH STRENGTH/HIGH PERFORMANCE SPRAYED CONCRETE

High strength concrete/high performance concrete is a concrete type differing from other sprayed concrete types in its higher strengths and in at least one other improved property. In this paper a description is given of the use of high strength/high performance sprayed concrete for the repair of the St. Kuzam Tunnel in Croatia. The test section had a total length of 24 m. The test results obtained from the repaired section illustrate that high strength/high performance sprayed concrete exhibits better properties than conventional fibre reinforced sprayed concrete which is normally used for the construction of tunnel primary tunnel lining. Non-destructive test methods were employed in control testing, with special attention being brought to the importance of their use in tunnelling.

Sprayed Concrete; Tunnel Repair; Non Destructuve Testing

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