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Influence of red mud addition in alkali-activated mortars on corrosion resistance of steel (CROSBI ID 727444)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Vladić, Ivana ; Radoš, Vinko ; Serdar, Marijana Influence of red mud addition in alkali-activated mortars on corrosion resistance of steel // MATEC Web of Conferences 364. 2022. str. 1-4

Podaci o odgovornosti

Vladić, Ivana ; Radoš, Vinko ; Serdar, Marijana

engleski

Influence of red mud addition in alkali-activated mortars on corrosion resistance of steel

Alkali-activated materials (AAM) consist of a precursor, which is a source of aluminosilicates, and an alkali source. The precursors are usually waste materials from various industries such as fly ash from thermal power plants and slags from the metallurgical industry. Due to the increasing use of these materials in the cement industry and strategies for decommissioning coal-fired power plants, alternative raw materials from waste streams are increasingly being explored. One of these materials is waste from the aluminium industry, known as red mud. Due to its chemical composition, which is similar to that of other cementitious materials, red mud is suitable for use in the cement industry. It can also be used as a source of aluminosilicates in the synthesis of AAM. In this study, the corrosion behaviour of steel in chloride exposed AAMs based on fly ash and slag was investigated with and without the addition of red mud. During exposure of AAM to tap water and a 3.5 wt.% NaCl solution, the corrosion process was monitored by corrosion potential and polarisation resistance. AAM mixes containing red mud exhibited better corrosion resistivity and lower current density values compared to mixes without red mud, indicating a possible contribution of the red mud to chloride binding and improving the passivity of the steel.

Red mud, corrosion parameters, alkali-activated materials

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Podaci o prilogu

1-4.

2022.

objavljeno

Podaci o matičnoj publikaciji

MATEC Web of Conferences 364

Podaci o skupu

6th International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2022)

predavanje

03.10.2022-05.10.2022

Cape Town, Južnoafrička Republika

Povezanost rada

Građevinarstvo, Temeljne tehničke znanosti