Pregled bibliografske jedinice broj: 480528
Concrete Exposure Classes concerning Corrosion Induced by Chlorides - Criterions - Experimental Results and Possible Misleads
Concrete Exposure Classes concerning Corrosion Induced by Chlorides - Criterions - Experimental Results and Possible Misleads // Codes in Structural Engineering - Developments and Needs for International Practice / Hirt, Manfred A. ; Radić, Jure ; Mandić, Ana (ur.).
Zagreb: SECON - CSSE, 2010. str. 1105-1112 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Concrete Exposure Classes concerning Corrosion Induced by Chlorides - Criterions - Experimental Results and Possible Misleads
Autori
Marušić, Elica ; Akrap, Nedjeljko ; Dragović, Tin ; Čujić Nikić, Inga ; Jurašin, Marija
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Codes in Structural Engineering - Developments and Needs for International Practice
/ Hirt, Manfred A. ; Radić, Jure ; Mandić, Ana - Zagreb : SECON - CSSE, 2010, 1105-1112
ISBN
978-953-7621-05-6
Skup
Joint IABSE - fib Conference Dubrovnik 2010 - Codes in Structural Engineering
Mjesto i datum
Cavtat, Hrvatska, 03.05.2010. - 05.05.2010
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
concrete; chlorides; exposure classes; criterions
(beton; kloridi; razredi izloženosti; kriteriji)
Sažetak
Chloride migration coefficient is one of the main parameters for describing the durability of concrete constructions concerning the risk of reinforcement corrosion caused by chlorides. Exposure classes related to corrosion induced by chlorides from sea water are defined in Croatian regulation, but criterions for satisfying exposure classes aren't. In Croatian practice these criterions are usually defined by values of chloride migration coefficient tested on concrete according to standard NT BUILD 492 from non-steady-state migration experiment There are also some values of mentioned coefficient that are accepted in practice for defining exposure classes, but they aren't officially approved. During performance of laboratory tests it was noticed that results obtained by test method NT BUILD 492 on same concrete were significantly different depending on moisture content of concrete although preconditioning was prescribed in the test method. So, results obtained by tests could mislead and put the same concrete in different exposure classes. In order to find the improvement for test method, interlaboratory test was organized. Results are shown in this article together with suggestion for improvement of standard NT BUILD 492 and suggestion for defining state of saturation in project requirements together with required value of chloride migration coefficient. Besides, as permeability properties, especially of concrete with mineral additives, depend on age of concrete, it is necessary to prescribe age in which chloride migration coefficient should have required value.
Izvorni jezik
Engleski
Znanstvena područja
Građevinarstvo
