| Title: | Investigating the synergistic impact of freeze-thaw cycles and deicing salts on the properties of cementitious composites incorporating natural fibers and fly ash |
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| Authors: | ID Merta, Ildikó (Author)
ID Zalar Serjun, Vesna (Author)
ID Mauko Pranjić, Alenka (Author)
ID Šajna, Aljoša (Author)
ID Štefančič, Mateja (Author)
ID Poletanovic, Bojan (Author)
ID Ameri, Farshad (Author)
ID Mladenović, Ana (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S2666790824001332
 PDF - Presentation file, download (10,99 MB)
MD5: E351A449375BCF87807D43F314A203D8
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | In cold climates, concrete structures confront durability challenges due to harsh conditions. This study evaluates the effects of incorporating natural fibers, such as hemp and flax fibers (at 1 vol%), and partially replacing cement with fly ash (at 25 and 50 wt%) on the properties of cementitious composites subjected to accelerated aging under freeze-thaw cycles and deicing salts. Findings reveal that natural fibers enhance the freeze-thaw resistance, reducing deterioration (scaling) to 5-8% after 56 cycles. When mortars were subjected to accelerated freeze-thaw cycles, the compressive strength of plain mortar significantly decreased (up to 57%). However, adding natural fibers to the matrix substantially reduced its compressive strength loss. In the case of flexural strength, plain mortars experienced 33% loss, while hemp, flax, and polypropylene fiber mortars showed only 13%, 23%, and 10% losses, respectively. Furthermore, mortars experience a notable enhancement in their energy absorption capacity when reinforced with natural fibers, particularly with hemp fibers (up to 348% higher than plain mortar). Under harsh conditions, hemp and flax-reinforced mortars, with 25wt% fly ash replacement, lose the compressive strength significantly however still demonstrate an alternative to synthetic fibers in terms of flexural strength. Even with 25wt% of fly ash, mortars with natural fiber reinforcement display significantly superior energy absorption capacities compared to plain mortars (up to 48%). |
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| Keywords: | cementitious composites, natural fibers, freeze-thaw cycles, mechanical properties, mass loss, fly ash |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 06.12.2024 |
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| Publisher: | Elsevier Ltd. |
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| Year of publishing: | 2025 |
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| Number of pages: | 1-46 str. |
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| Numbering: | Vol. 24, [article no.] 100853 |
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| PID: | 20.500.12556/DiRROS-21105  |
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| UDC: | 54 |
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| ISSN on article: | 2666-7908 |
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| DOI: | 10.1016/j.clet.2024.100853 |
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| COBISS.SI-ID: | 218668547 |
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| Copyright: | © 2024 The Authors. |
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| Note: |
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| Publication date in DiRROS: | 23.12.2024 |
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| Views: | 12 |
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| Downloads: | 6 |
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