Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings
This study investigates the development of elastic and creep properties of sodium hydroxide-activated blast furnace slag mortar, utilizing three different molarities of the activator solution and two solution-to-binder ratio and a reference OPC-based mixture, since the earliest age. The experimental...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
|
| Series: | Developments in the Built Environment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165923001576 |
| _version_ | 1797387785189982208 |
|---|---|
| author | Ali Naqi Brice Delsaute Markus Königsberger Stéphanie Staquet |
| author_facet | Ali Naqi Brice Delsaute Markus Königsberger Stéphanie Staquet |
| author_sort | Ali Naqi |
| collection | DOAJ |
| description | This study investigates the development of elastic and creep properties of sodium hydroxide-activated blast furnace slag mortar, utilizing three different molarities of the activator solution and two solution-to-binder ratio and a reference OPC-based mixture, since the earliest age. The experimental phase involves a series of hourly-repeated 5-min long creep tests on the aging material. This approach enables continuous monitoring, facilitating the characterization of early-age elastic stiffness and creep properties. Linear regression is employed to calculate the tangent unloading (elastic) modulus and Poisson's ratio. To model short-term creep behaviour, a power-law creep function is utilized. The integration of these findings with calorimetry-derived evolutions of cumulative heat release establishes linear correlation between (compressive) strength and heat release, along with a power function relationship between unloading (elastic) modulus and heat release. An optimal alkali dosage (Na2O content) appears to be vital for long-term strength development. Additionally, the creep parameters, namely amplitude (A) and kinetic (K), demonstrate a gradual decrease, although they maintain values higher than those of the corresponding OPC mixture, as the heat release progresses. |
| first_indexed | 2024-03-08T22:31:09Z |
| format | Article |
| id | doaj.art-38929e1d781f4009aaf97e64a8ef6fa5 |
| institution | Directory Open Access Journal |
| issn | 2666-1659 |
| language | English |
| last_indexed | 2024-03-08T22:31:09Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj.art-38929e1d781f4009aaf97e64a8ef6fa52023-12-18T04:25:07ZengElsevierDevelopments in the Built Environment2666-16592023-12-0116100275Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadingsAli Naqi0Brice Delsaute1Markus Königsberger2Stéphanie Staquet3BATir Department, Université Libre de Bruxelles, CP194/02, 50 Avenue F.D. Roosevelt, Brussels 1050, Belgium; Corresponding author.BATir Department, Université Libre de Bruxelles, CP194/02, 50 Avenue F.D. Roosevelt, Brussels 1050, BelgiumBATir Department, Université Libre de Bruxelles, CP194/02, 50 Avenue F.D. Roosevelt, Brussels 1050, Belgium; Institute for Mechanics of Materials and Structures, TU Wien, Karlsplatz 13/202, Vienna 1040, AustriaBATir Department, Université Libre de Bruxelles, CP194/02, 50 Avenue F.D. Roosevelt, Brussels 1050, BelgiumThis study investigates the development of elastic and creep properties of sodium hydroxide-activated blast furnace slag mortar, utilizing three different molarities of the activator solution and two solution-to-binder ratio and a reference OPC-based mixture, since the earliest age. The experimental phase involves a series of hourly-repeated 5-min long creep tests on the aging material. This approach enables continuous monitoring, facilitating the characterization of early-age elastic stiffness and creep properties. Linear regression is employed to calculate the tangent unloading (elastic) modulus and Poisson's ratio. To model short-term creep behaviour, a power-law creep function is utilized. The integration of these findings with calorimetry-derived evolutions of cumulative heat release establishes linear correlation between (compressive) strength and heat release, along with a power function relationship between unloading (elastic) modulus and heat release. An optimal alkali dosage (Na2O content) appears to be vital for long-term strength development. Additionally, the creep parameters, namely amplitude (A) and kinetic (K), demonstrate a gradual decrease, although they maintain values higher than those of the corresponding OPC mixture, as the heat release progresses.http://www.sciencedirect.com/science/article/pii/S2666165923001576Alkali-activated materialsHeat release compressive strengthElastic stiffnessCreep |
| spellingShingle | Ali Naqi Brice Delsaute Markus Königsberger Stéphanie Staquet Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings Developments in the Built Environment Alkali-activated materials Heat release compressive strength Elastic stiffness Creep |
| title | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings |
| title_full | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings |
| title_fullStr | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings |
| title_full_unstemmed | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings |
| title_short | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings |
| title_sort | monitoring early age elastic and viscoelastic properties of alkali activated slag mortar by means of repeated minute long loadings |
| topic | Alkali-activated materials Heat release compressive strength Elastic stiffness Creep |
| url | http://www.sciencedirect.com/science/article/pii/S2666165923001576 |
| work_keys_str_mv | AT alinaqi monitoringearlyageelasticandviscoelasticpropertiesofalkaliactivatedslagmortarbymeansofrepeatedminutelongloadings AT bricedelsaute monitoringearlyageelasticandviscoelasticpropertiesofalkaliactivatedslagmortarbymeansofrepeatedminutelongloadings AT markuskonigsberger monitoringearlyageelasticandviscoelasticpropertiesofalkaliactivatedslagmortarbymeansofrepeatedminutelongloadings AT stephaniestaquet monitoringearlyageelasticandviscoelasticpropertiesofalkaliactivatedslagmortarbymeansofrepeatedminutelongloadings |