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Freeze-Thaw Endurance of Strain-Hardening Cementitious Composites with Low Clinker Content
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
This paper delves into the influence of freeze-thaw (FT) cycles on the mechanical and cracking behavior of strain-hardening cementitious composites (SHCC). These composites were made using a low carbon cementitious matrix – limestone calcined clay cement (LC3) – and reinforced with 2 wt.% ultra-high molecular weight polyethylene (PE) fibers. Performance evaluation was conducted through uniaxial tension tests at a quasi-static deformation rate. Some specimens were preloaded to 1% strain before FT exposure, while the others were investigated without any damage (virgin). All the specimens were then subjected to standard FT cycles as per RILEM recommendations (TC 117-FDC) and exposed to both de-icing salt solution and distilled water for a total of 180 cycles. Following this exposure, further uniaxial tensile tests until ultimate failure were carried out. Analysis of mechanical properties unveiled a marginal deterioration in tensile strength post-FT cycles compared to reference samples. However, all composites sustained a reasonable strain capacity of a minimum of 2.5%, with an average crack width controlled at around 100 µm. From a physical degradation standpoint, evident scaling manifested only when specimens encountered FT cycles in de-icing salt solution. In general, SHCC made of the LC3 matrix showed exceptional resilience to such challenging environments, maintaining a level of performance deemed satisfactory.
Freeze-Thaw Endurance of Strain-Hardening Cementitious Composites with Low Clinker Content
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
This paper delves into the influence of freeze-thaw (FT) cycles on the mechanical and cracking behavior of strain-hardening cementitious composites (SHCC). These composites were made using a low carbon cementitious matrix – limestone calcined clay cement (LC3) – and reinforced with 2 wt.% ultra-high molecular weight polyethylene (PE) fibers. Performance evaluation was conducted through uniaxial tension tests at a quasi-static deformation rate. Some specimens were preloaded to 1% strain before FT exposure, while the others were investigated without any damage (virgin). All the specimens were then subjected to standard FT cycles as per RILEM recommendations (TC 117-FDC) and exposed to both de-icing salt solution and distilled water for a total of 180 cycles. Following this exposure, further uniaxial tensile tests until ultimate failure were carried out. Analysis of mechanical properties unveiled a marginal deterioration in tensile strength post-FT cycles compared to reference samples. However, all composites sustained a reasonable strain capacity of a minimum of 2.5%, with an average crack width controlled at around 100 µm. From a physical degradation standpoint, evident scaling manifested only when specimens encountered FT cycles in de-icing salt solution. In general, SHCC made of the LC3 matrix showed exceptional resilience to such challenging environments, maintaining a level of performance deemed satisfactory.
Freeze-Thaw Endurance of Strain-Hardening Cementitious Composites with Low Clinker Content
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
This paper delves into the influence of freeze-thaw (FT) cycles on the mechanical and cracking behavior of strain-hardening cementitious composites (SHCC). These composites were made using a low carbon cementitious matrix – limestone calcined clay cement (LC3) – and reinforced with 2 wt.% ultra-high molecular weight polyethylene (PE) fibers. Performance evaluation was conducted through uniaxial tension tests at a quasi-static deformation rate. Some specimens were preloaded to 1% strain before FT exposure, while the others were investigated without any damage (virgin). All the specimens were then subjected to standard FT cycles as per RILEM recommendations (TC 117-FDC) and exposed to both de-icing salt solution and distilled water for a total of 180 cycles. Following this exposure, further uniaxial tensile tests until ultimate failure were carried out. Analysis of mechanical properties unveiled a marginal deterioration in tensile strength post-FT cycles compared to reference samples. However, all composites sustained a reasonable strain capacity of a minimum of 2.5%, with an average crack width controlled at around 100 µm. From a physical degradation standpoint, evident scaling manifested only when specimens encountered FT cycles in de-icing salt solution. In general, SHCC made of the LC3 matrix showed exceptional resilience to such challenging environments, maintaining a level of performance deemed satisfactory.
Freeze-Thaw Endurance of Strain-Hardening Cementitious Composites with Low Clinker Content
RILEM Bookseries
Mechtcherine, Viktor (Herausgeber:in) / Signorini, Cesare (Herausgeber:in) / Junger, Dominik (Herausgeber:in) / Ahmed, Ameer Hamza (Autor:in) / Liebscher, Marco (Autor:in) / Mechtcherine, Viktor (Autor:in)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2024 ; Dresden, Germany
Transforming Construction: Advances in Fiber Reinforced Concrete ; Kapitel: 42 ; 335-343
RILEM Bookseries ; 54
12.09.2024
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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