Study of a repair technique in carbonated blended mortars: Electrochemical re-alkalization
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional de Colombia
2016
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| _version_ | 1876489289662988288 |
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| author | Ana María Aguirre |
| author_facet | Ana María Aguirre |
| contents | Study of a repair technique in carbonated blended mortars: Electrochemical re-alkalization Ana María Aguirre Ruby Mejía-de Gutiérrez Jean Paul Restucci Alexander Alvarado Ingeniería Metakaoli Carbonation Silica Fume alkalization Blended Mortars The present article studies the influence of two pozzolanic add itions, metakaolin (MK) and silica fume (SF), and the water/bin der ratio (w/b) on the electrochemical re- alkalization (ER) of reinforced mortars as a technique to prevent reinforcement corrosion in c arbonated concrete. Mixtures with a 10% (by weight) addition as a replace ment for cement at w/b ratios of 0.45 and 0.65 were prepared. T est specimens were exposed to carbona tion in a chamber under contro lled conditions (1% CO 2 , 65%RH, and 25°C), until reaching two levels of carbonation (50% and 100%). ER was applied for a period of 1 5 days using sodium carbonate as the electrolyte and a current density of 1 A/m 2 . From the evaluated additions, MK is highlighted, which genera ted a resistance increase of 53. 51% relative to that of the ref erence mixture and contributes to improvements of durability propertie s. Regarding the ER technique, the specimens with greater w/b r atios and partial carbonation we re more effective. 2016 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49645153012 https://www.redalyc.org/journal/496/49645153012/ https://www.redalyc.org/journal/496/49645153012/html/ https://www.redalyc.org/journal/496/49645153012/49645153012.epub https://www.redalyc.org/journal/496/49645153012/movil en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.196 Vol.83 |
| format | Artículo científico |
| id | redalyc_49645153012 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Study of a repair technique in carbonated blended mortars: Electrochemical re-alkalization Ana María Aguirre Ingeniería Metakaoli Carbonation Silica Fume alkalization Blended Mortars Study of a repair technique in carbonated blended mortars: Electrochemical re-alkalization Ana María Aguirre Ruby Mejía-de Gutiérrez Jean Paul Restucci Alexander Alvarado Ingeniería Metakaoli Carbonation Silica Fume alkalization Blended Mortars The present article studies the influence of two pozzolanic add itions, metakaolin (MK) and silica fume (SF), and the water/bin der ratio (w/b) on the electrochemical re- alkalization (ER) of reinforced mortars as a technique to prevent reinforcement corrosion in c arbonated concrete. Mixtures with a 10% (by weight) addition as a replace ment for cement at w/b ratios of 0.45 and 0.65 were prepared. T est specimens were exposed to carbona tion in a chamber under contro lled conditions (1% CO 2 , 65%RH, and 25°C), until reaching two levels of carbonation (50% and 100%). ER was applied for a period of 1 5 days using sodium carbonate as the electrolyte and a current density of 1 A/m 2 . From the evaluated additions, MK is highlighted, which genera ted a resistance increase of 53. 51% relative to that of the ref erence mixture and contributes to improvements of durability propertie s. Regarding the ER technique, the specimens with greater w/b r atios and partial carbonation we re more effective. 2016 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49645153012 https://www.redalyc.org/journal/496/49645153012/ https://www.redalyc.org/journal/496/49645153012/html/ https://www.redalyc.org/journal/496/49645153012/49645153012.epub https://www.redalyc.org/journal/496/49645153012/movil en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.196 Vol.83 |
| title | Study of a repair technique in carbonated blended mortars: Electrochemical re-alkalization |
| topic | Ingeniería Metakaoli Carbonation Silica Fume alkalization Blended Mortars |
| url | https://www.redalyc.org/articulo.oa?id=49645153012 https://www.redalyc.org/journal/496/49645153012/ https://www.redalyc.org/journal/496/49645153012/html/ https://www.redalyc.org/journal/496/49645153012/49645153012.epub https://www.redalyc.org/journal/496/49645153012/movil |