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A platform for research: civil engineering, architecture and urbanism
Graphene nanoribbons: A novel additive for enhancing the fire resistance of cementitious composites
https://orcid.org/0000-0002-7476-9416
https://orcid.org/0000-0002-6947-6627
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0009-0003-2298-4215
https://orcid.org/0000-0001-9415-3187
https://orcid.org/0000-0002-8511-6939
Abstract This study investigated the effectiveness of graphene nanoribbons (GNRs) as nanoadditives for enhancing fire resistance of cementitious composites and compared their performance with conventional carbon nanotubes (CNTs). First, GNRs with striped structures exhibited superior dispersion stability compared to CNTs. Second, GNRs demonstrated excellent thermal stability, remaining structurally intact at 800 °C, while CNTs began decomposing above 450 °C. At room temperature, the GNRs significantly promoted the hydration reaction of cement clinkers, reduced the porosity, and refined the pore structure, thereby enhancing the mechanical properties of the cementitious composites. In high-temperature environments, GNRs act as bridges for cracks, effectively mitigating the deterioration of the mechanical strength caused by the dehydration and decomposition of hydration products. Moreover, the GNRs inhibited pore development and elongation, improving fire resistance. Overall, this study highlights the potential of GNRs as promising nanomaterials for enhancing the performance of cementitious composites under high-temperature conditions.
Graphical Abstract Display Omitted
Highlights GNRs possess superior thermal stability, and their structure remains undamaged even at a temperature of 800 °C. GNRs improve the mechanical properties of cementitious composites by promoting the hydration reaction and providing a bridging and filling effect. GNRs can effectively inhibit the development and elongation of pores and improve the microstructure of cementitious composites subjected to heating.
Graphene nanoribbons: A novel additive for enhancing the fire resistance of cementitious composites
https://orcid.org/0000-0002-7476-9416
https://orcid.org/0000-0002-6947-6627
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0009-0003-2298-4215
https://orcid.org/0000-0001-9415-3187
https://orcid.org/0000-0002-8511-6939
Abstract This study investigated the effectiveness of graphene nanoribbons (GNRs) as nanoadditives for enhancing fire resistance of cementitious composites and compared their performance with conventional carbon nanotubes (CNTs). First, GNRs with striped structures exhibited superior dispersion stability compared to CNTs. Second, GNRs demonstrated excellent thermal stability, remaining structurally intact at 800 °C, while CNTs began decomposing above 450 °C. At room temperature, the GNRs significantly promoted the hydration reaction of cement clinkers, reduced the porosity, and refined the pore structure, thereby enhancing the mechanical properties of the cementitious composites. In high-temperature environments, GNRs act as bridges for cracks, effectively mitigating the deterioration of the mechanical strength caused by the dehydration and decomposition of hydration products. Moreover, the GNRs inhibited pore development and elongation, improving fire resistance. Overall, this study highlights the potential of GNRs as promising nanomaterials for enhancing the performance of cementitious composites under high-temperature conditions.
Graphical Abstract Display Omitted
Highlights GNRs possess superior thermal stability, and their structure remains undamaged even at a temperature of 800 °C. GNRs improve the mechanical properties of cementitious composites by promoting the hydration reaction and providing a bridging and filling effect. GNRs can effectively inhibit the development and elongation of pores and improve the microstructure of cementitious composites subjected to heating.
Graphene nanoribbons: A novel additive for enhancing the fire resistance of cementitious composites
https://orcid.org/0000-0002-7476-9416
https://orcid.org/0000-0002-6947-6627
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0009-0003-2298-4215
https://orcid.org/0000-0001-9415-3187
https://orcid.org/0000-0002-8511-6939
Abstract This study investigated the effectiveness of graphene nanoribbons (GNRs) as nanoadditives for enhancing fire resistance of cementitious composites and compared their performance with conventional carbon nanotubes (CNTs). First, GNRs with striped structures exhibited superior dispersion stability compared to CNTs. Second, GNRs demonstrated excellent thermal stability, remaining structurally intact at 800 °C, while CNTs began decomposing above 450 °C. At room temperature, the GNRs significantly promoted the hydration reaction of cement clinkers, reduced the porosity, and refined the pore structure, thereby enhancing the mechanical properties of the cementitious composites. In high-temperature environments, GNRs act as bridges for cracks, effectively mitigating the deterioration of the mechanical strength caused by the dehydration and decomposition of hydration products. Moreover, the GNRs inhibited pore development and elongation, improving fire resistance. Overall, this study highlights the potential of GNRs as promising nanomaterials for enhancing the performance of cementitious composites under high-temperature conditions.
Graphical Abstract Display Omitted
Highlights GNRs possess superior thermal stability, and their structure remains undamaged even at a temperature of 800 °C. GNRs improve the mechanical properties of cementitious composites by promoting the hydration reaction and providing a bridging and filling effect. GNRs can effectively inhibit the development and elongation of pores and improve the microstructure of cementitious composites subjected to heating.
Graphene nanoribbons: A novel additive for enhancing the fire resistance of cementitious composites
Li, Peiqi (author) / Liu, Junxing (author) / Suh, Heongwon (author) / Im, Sumin (author) / Piao, Taiyan (author) / Nezhad, Erfan Zal (author) / Wi, Kwangwoo (author) / Bae, Sungchul (author)
2024-03-27
Article (Journal)
Electronic Resource
English