Naslov
Crack Repair Assessment by Ultrasonic Method

Autori
Bjegović, Dubravka ; Skazlić, Marijan ; Jambrešić, Mladen

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), stručni

Izvornik
Application of Contemporary Non-Destructive Testing in Engineering - Conference Proceedings / Grum, Janez - Ljubljana : Slovenian Society for Non-Destructive Testing, 2005, 81-89

Skup
The 8th International Conference of the Slovenian Society for Non-destructive Testing: Application of Contemporary Non-Destructive testing in Engineering

Mjesto i datum
Portorož, Slovenija, 01.09.2005. - 03.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
concrete structure; crack repair; injecting; ultrasonic testing

Sažetak
Cast in-situ concrete structures are hardly ever built under ideal conditions so defects may occur as the concrete is being cast or very soon afterwards. In most cases the cause of defects is inadequate design and poor workmanship. This paper describes the damage that occurred during the construction of a big shopping centre in Zagreb, Croatia. Very soon after the building construction was completed, large cracks appeared on the basement walls, and it was through those cracks that underground water permeated. Crack repair was done by injection of polymeric resins. During the wall repair a non-destructive quality control was done by ultrasonic method. The ultrasonic pulse velocity method is a method that involves measuring the travel time of ultrasonic pulse over the known path length. It makes it possible to take a great number of samples or make structure examinations without structure destruction. The assessment of repair successfulness is based on statistical analysis of the results of measurement results, that is to say, on Student’ s t-test. The results obtained showed that the ultrasonic method can be effectively used during the crack repair.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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