Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures
Deformations of alkali-activated slag concrete (AASC) with high MgO and Al2O3 content, subjected to variable curing temperature were studied. Sodium silicate and sodium carbonate were used as alkali activators. The obtained results showed development of deformations consisting of both shrinkage and...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/6903725 |
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| author | Katalin Orosz Abeer Humad Hans Hedlund Andrzej Cwirzen |
| author_facet | Katalin Orosz Abeer Humad Hans Hedlund Andrzej Cwirzen |
| author_sort | Katalin Orosz |
| collection | DOAJ |
| description | Deformations of alkali-activated slag concrete (AASC) with high MgO and Al2O3 content, subjected to variable curing temperature were studied. Sodium silicate and sodium carbonate were used as alkali activators. The obtained results showed development of deformations consisting of both shrinkage and expansion. Shrinkage appeared not to be affected by the activator type, while the expansion developed after the cooling down phase in stabilized isothermal conditions and did not stop within the duration of the tests. X-ray diffraction analysis performed shortly after the cooling down phase indicated the formation of crystalline hydrotalcite, which was associated with the observed expansion. A mixture with a higher amount of sodium silicate showed less expansion, likely due to the accelerated hydration and geopolymerization leading to the increased stiffness of the binder matrix. |
| format | Article |
| id | doaj-art-da1d1093f1774796b249565232e34c17 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-da1d1093f1774796b249565232e34c172025-02-03T01:21:40ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/69037256903725Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing TemperaturesKatalin Orosz0Abeer Humad1Hans Hedlund2Andrzej Cwirzen3Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, SwedenDepartment of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, SwedenSkanska Sverige AB, SE-405 18 Gothenburg, SwedenDepartment of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, SwedenDeformations of alkali-activated slag concrete (AASC) with high MgO and Al2O3 content, subjected to variable curing temperature were studied. Sodium silicate and sodium carbonate were used as alkali activators. The obtained results showed development of deformations consisting of both shrinkage and expansion. Shrinkage appeared not to be affected by the activator type, while the expansion developed after the cooling down phase in stabilized isothermal conditions and did not stop within the duration of the tests. X-ray diffraction analysis performed shortly after the cooling down phase indicated the formation of crystalline hydrotalcite, which was associated with the observed expansion. A mixture with a higher amount of sodium silicate showed less expansion, likely due to the accelerated hydration and geopolymerization leading to the increased stiffness of the binder matrix.http://dx.doi.org/10.1155/2019/6903725 |
| spellingShingle | Katalin Orosz Abeer Humad Hans Hedlund Andrzej Cwirzen Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures Advances in Civil Engineering |
| title | Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures |
| title_full | Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures |
| title_fullStr | Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures |
| title_full_unstemmed | Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures |
| title_short | Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures |
| title_sort | autogenous deformation of alkali activated blast furnace slag concrete subjected to variable curing temperatures |
| url | http://dx.doi.org/10.1155/2019/6903725 |
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