Steel passive state stability in activated fly ash mortars
The present study explores the behaviour of structural steel embedded in Portland cement (OPC) mortars and NaOH- and NaOH-waterglass-activated fly ash, in the presence and absence of 2 % Cl- (CaCl2). Variations were determined in the corrosion potential (Ecorr), linear polarization resistance (Rp) a...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2010-12-01
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| Series: | Materiales de Construccion |
| Subjects: | |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/217 |
| _version_ | 1819297221630230528 |
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| author | A. Fernández-Jiménez J. M. Miranda J. A. González A. Palomo |
| author_facet | A. Fernández-Jiménez J. M. Miranda J. A. González A. Palomo |
| author_sort | A. Fernández-Jiménez |
| collection | DOAJ |
| description | The present study explores the behaviour of structural steel embedded in Portland cement (OPC) mortars and NaOH- and NaOH-waterglass-activated fly ash, in the presence and absence of 2 % Cl- (CaCl2). Variations were determined in the corrosion potential (Ecorr), linear polarization resistance (Rp) and corrosion current density (icorr) under different environmental conditions (90 days at 95 % relative humidity (RH), 30 days at ≈ 30 % RH, 760 days at ≈ 95 % RH). In the absence of Cl-, fly ash mortars were able to passivate steel reinforcement, although the stability of the passive state in changing environmental conditions was found to depend heavily on the activating solution used. Steel corrosion in the presence of 2 % Cl- was observed to be similar to the corrosion reported for the material in OPC mortars. |
| first_indexed | 2024-12-24T05:10:34Z |
| format | Article |
| id | doaj.art-b600160f88984b7eb0e31198253793a4 |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-24T05:10:34Z |
| publishDate | 2010-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-b600160f88984b7eb0e31198253793a42022-12-21T17:13:42ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262010-12-0160300516510.3989/mc.2010.53909207Steel passive state stability in activated fly ash mortarsA. Fernández-Jiménez0J. M. Miranda1J. A. González2A. Palomo3Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC), CSIC. MadridInstituto de Metalurgia, Universidad Autónoma de San Luis de PotosíCentro Nacional de Investigaciones Metalúrgicas (CENIM), CSIC. MadridInstituto de Ciencias de la Construcción Eduardo Torroja (IETCC), CSIC. MadridThe present study explores the behaviour of structural steel embedded in Portland cement (OPC) mortars and NaOH- and NaOH-waterglass-activated fly ash, in the presence and absence of 2 % Cl- (CaCl2). Variations were determined in the corrosion potential (Ecorr), linear polarization resistance (Rp) and corrosion current density (icorr) under different environmental conditions (90 days at 95 % relative humidity (RH), 30 days at ≈ 30 % RH, 760 days at ≈ 95 % RH). In the absence of Cl-, fly ash mortars were able to passivate steel reinforcement, although the stability of the passive state in changing environmental conditions was found to depend heavily on the activating solution used. Steel corrosion in the presence of 2 % Cl- was observed to be similar to the corrosion reported for the material in OPC mortars.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/217corrosionfly ashalkali activationmortarsmechanical strength |
| spellingShingle | A. Fernández-Jiménez J. M. Miranda J. A. González A. Palomo Steel passive state stability in activated fly ash mortars Materiales de Construccion corrosion fly ash alkali activation mortars mechanical strength |
| title | Steel passive state stability in activated fly ash mortars |
| title_full | Steel passive state stability in activated fly ash mortars |
| title_fullStr | Steel passive state stability in activated fly ash mortars |
| title_full_unstemmed | Steel passive state stability in activated fly ash mortars |
| title_short | Steel passive state stability in activated fly ash mortars |
| title_sort | steel passive state stability in activated fly ash mortars |
| topic | corrosion fly ash alkali activation mortars mechanical strength |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/217 |
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