1845 KB0 KB200020242019Bokan-Bosiljkov, VioletaHren, MihaKosec, TadejaLegat, Andražštevilka:5letnik:53str. 679-686ISSN:1580-2949COBISSID_HOST:8981345URN:URN:NBN:SI:doc-6P7CRD2DenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeblended cementscorrosionkorozijamaltamešanica cementovmortarpore solutionporna vodaCorrosion performance of steel in blended cement pore solutions| Korozijska odpornost jekla v pornih vodah iz mešanih cementov|Blended cements might change the chemistry of the pore solution and subsequently affect the corrosion of steel in concrete. Pore solutions were extracted, analyzed and compared from mortars made of CEM I, CEM II, CEM III and CEM IV cements. Three combinations of carbonation and chloride states were studied, i.e., non-carbonated without chlorides, non-carbonated with chlorides and carbonated with chlorides. Different electrochemical and spectroscopic techniques were used to study the electrochemical properties, the type and the extent of the corrosion products, as well as the type and the extent of the corrosion damage. It was confirmed that the most corrosive environments were pore solutions extracted from the carbonated mortars with chlorides. In this environment the highest corrosion rate was observed for the CEM III pore solution, and the lowest for the CEM I. The extent and the type of corrosion products and the corrosion damage varied according to the environmentCementi z mineralnimi dodatki lahko spremenijo strukturo porne vode in posledično vplivajo na korozijske lastnosti jekla. Porne vode so bile iztisnjene in analizirane iz malt, narejenih iz CEM I, CEM II, CEM III in CEM IV cementov. Malte so bile predhodno izpostavljene kloridom ali pospešeni karbonatizaciji v treh kombinacijah: brez karbonatizacije in brez kloridov, brez karbonatizacije s kloridi in v karbonatizaciji s kloridi. Za ugotavljanje korozijskih lastnosti jekla v pornih vodah so bile uporabljene različne elektrokemijske in spektroskopske metode. Analizirane so bile elektrokemijske lastnosti, tip in obseg korozijskih produktov ter tip in obseg korozijskih poškodb. Ugotovljeno je bilo, da najbolj korozivno okolje pripada pornim vodam v karbonatizirani malti s kloridi, kjer je bila najvišja korozijska hitrost izmerjena v pornih vodah iz CEM III cementa, najmanj{a pa iz CEM I cementa. Obseg in tip korozijskih produktov ter poškodb se je razlikoval skladno s korozivnostjo okoljaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije