Effect of curing time on the chloride diffusion of alkali-activated slag
Resistance to chloride penetration plays a crucial role in preventing premature corrosion of reinforced concrete in marine environments or when using de-icing salts. For reinforced concrete with ordinary Portland cement (OPC), the curing of concrete is vital in ensuring that the designed chloride pe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522000596 |
| _version_ | 1811250675852509184 |
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| author | Antonino Runci Marijana Serdar |
| author_facet | Antonino Runci Marijana Serdar |
| author_sort | Antonino Runci |
| collection | DOAJ |
| description | Resistance to chloride penetration plays a crucial role in preventing premature corrosion of reinforced concrete in marine environments or when using de-icing salts. For reinforced concrete with ordinary Portland cement (OPC), the curing of concrete is vital in ensuring that the designed chloride penetration resistance of concrete is achieved. The method and duration of curing are especially important with alkali-activated slag (AAS) to allow proper reaction and development of the pore structure. AAS generally needs to be cured under closed conditions for at least 28 d to achieve the desired quality. The objective of this study was to analyse the effect of curing time on the development of chloride diffusion resistance and pore structure of alkali-activated slag mortar. Chloride diffusion resistance was analysed at 7, 28, and 90 d using non-steady-state chloride migration according to NT BUILD 492 and accelerated chloride testing according to NT BUILD 443, both of which were originally developed for OPC. Mercury intrusion porosimetry (MIP) was used to evaluate the effect of pore structure on chloride penetration. The diffusion results of alkali-activated mortar showed that high resistance to chlorides can be achieved after only 7 d of curing, which is attributed to the development of fine porosity of alkali-activated slag at an early age. |
| first_indexed | 2024-04-12T16:08:14Z |
| format | Article |
| id | doaj.art-915398642d2c47f09deb9d77038efea6 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-12T16:08:14Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-915398642d2c47f09deb9d77038efea62022-12-22T03:25:59ZengElsevierCase Studies in Construction Materials2214-50952022-06-0116e00927Effect of curing time on the chloride diffusion of alkali-activated slagAntonino Runci0Marijana Serdar1University of Zagreb, Faculty of Civil Engineering, Department of Materials, CroatiaCorresponding author.; University of Zagreb, Faculty of Civil Engineering, Department of Materials, CroatiaResistance to chloride penetration plays a crucial role in preventing premature corrosion of reinforced concrete in marine environments or when using de-icing salts. For reinforced concrete with ordinary Portland cement (OPC), the curing of concrete is vital in ensuring that the designed chloride penetration resistance of concrete is achieved. The method and duration of curing are especially important with alkali-activated slag (AAS) to allow proper reaction and development of the pore structure. AAS generally needs to be cured under closed conditions for at least 28 d to achieve the desired quality. The objective of this study was to analyse the effect of curing time on the development of chloride diffusion resistance and pore structure of alkali-activated slag mortar. Chloride diffusion resistance was analysed at 7, 28, and 90 d using non-steady-state chloride migration according to NT BUILD 492 and accelerated chloride testing according to NT BUILD 443, both of which were originally developed for OPC. Mercury intrusion porosimetry (MIP) was used to evaluate the effect of pore structure on chloride penetration. The diffusion results of alkali-activated mortar showed that high resistance to chlorides can be achieved after only 7 d of curing, which is attributed to the development of fine porosity of alkali-activated slag at an early age.http://www.sciencedirect.com/science/article/pii/S2214509522000596Alkali activated slagChloride migrationChloride diffusionPore structureElectrical resistivityCuring |
| spellingShingle | Antonino Runci Marijana Serdar Effect of curing time on the chloride diffusion of alkali-activated slag Case Studies in Construction Materials Alkali activated slag Chloride migration Chloride diffusion Pore structure Electrical resistivity Curing |
| title | Effect of curing time on the chloride diffusion of alkali-activated slag |
| title_full | Effect of curing time on the chloride diffusion of alkali-activated slag |
| title_fullStr | Effect of curing time on the chloride diffusion of alkali-activated slag |
| title_full_unstemmed | Effect of curing time on the chloride diffusion of alkali-activated slag |
| title_short | Effect of curing time on the chloride diffusion of alkali-activated slag |
| title_sort | effect of curing time on the chloride diffusion of alkali activated slag |
| topic | Alkali activated slag Chloride migration Chloride diffusion Pore structure Electrical resistivity Curing |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522000596 |
| work_keys_str_mv | AT antoninorunci effectofcuringtimeonthechloridediffusionofalkaliactivatedslag AT marijanaserdar effectofcuringtimeonthechloridediffusionofalkaliactivatedslag |