Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Autonomous self-healing behavior of geopolymer pastes under varied curing environments
https://orcid.org/0000-0001-5602-9687
https://orcid.org/0000-0002-1893-6785
Abstract This study examined the effectiveness of incorporating self-healing capsules based on sodium silicate in geopolymers containing fly ash and metakaolin. To evaluate the self-healing capabilities, geopolymer samples with the self-healing capsules were preloaded and subjected to different healing conditions: 100% relative humidity at room temperature, 100% relative humidity at 60°C, and water curing. The crack sealing capability, compressive strength recovery, and changes in the sorptivity coefficient of the geopolymer paste with varying amounts of self-healing capsules were investigated. The self-healing process performed under 100%RH-60°C resulted in the highest crack sealing efficiency (91.6±18.53%), mechanical recovery, and improved water tightness. XRD, FT-IR, and SEM-EDX techniques confirmed that primary self-healing products were amorphous aluminosilicates.
Highlights Encapsulated sodium silicate (SHA) was used as self-healing agent. The highest crack sealing efficiency (91.6±18.53%) for 100%RH-60°C condition. The main self-healing products were amorphous aluminosilicates. Using SHA decreased the water sorptivity for all healing conditions.
Autonomous self-healing behavior of geopolymer pastes under varied curing environments
https://orcid.org/0000-0001-5602-9687
https://orcid.org/0000-0002-1893-6785
Abstract This study examined the effectiveness of incorporating self-healing capsules based on sodium silicate in geopolymers containing fly ash and metakaolin. To evaluate the self-healing capabilities, geopolymer samples with the self-healing capsules were preloaded and subjected to different healing conditions: 100% relative humidity at room temperature, 100% relative humidity at 60°C, and water curing. The crack sealing capability, compressive strength recovery, and changes in the sorptivity coefficient of the geopolymer paste with varying amounts of self-healing capsules were investigated. The self-healing process performed under 100%RH-60°C resulted in the highest crack sealing efficiency (91.6±18.53%), mechanical recovery, and improved water tightness. XRD, FT-IR, and SEM-EDX techniques confirmed that primary self-healing products were amorphous aluminosilicates.
Highlights Encapsulated sodium silicate (SHA) was used as self-healing agent. The highest crack sealing efficiency (91.6±18.53%) for 100%RH-60°C condition. The main self-healing products were amorphous aluminosilicates. Using SHA decreased the water sorptivity for all healing conditions.
Autonomous self-healing behavior of geopolymer pastes under varied curing environments
https://orcid.org/0000-0001-5602-9687
https://orcid.org/0000-0002-1893-6785
Abstract This study examined the effectiveness of incorporating self-healing capsules based on sodium silicate in geopolymers containing fly ash and metakaolin. To evaluate the self-healing capabilities, geopolymer samples with the self-healing capsules were preloaded and subjected to different healing conditions: 100% relative humidity at room temperature, 100% relative humidity at 60°C, and water curing. The crack sealing capability, compressive strength recovery, and changes in the sorptivity coefficient of the geopolymer paste with varying amounts of self-healing capsules were investigated. The self-healing process performed under 100%RH-60°C resulted in the highest crack sealing efficiency (91.6±18.53%), mechanical recovery, and improved water tightness. XRD, FT-IR, and SEM-EDX techniques confirmed that primary self-healing products were amorphous aluminosilicates.
Highlights Encapsulated sodium silicate (SHA) was used as self-healing agent. The highest crack sealing efficiency (91.6±18.53%) for 100%RH-60°C condition. The main self-healing products were amorphous aluminosilicates. Using SHA decreased the water sorptivity for all healing conditions.
Autonomous self-healing behavior of geopolymer pastes under varied curing environments
Ozen, Meral Yildirim (Autor:in) / Firdous, Rafia (Autor:in) / Lehmann, Christian (Autor:in) / Stephan, Dietmar (Autor:in)
30.03.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Autonomous self-healing behavior of geopolymer pastes under varied curing environments
| Elsevier | 2024