Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
https://orcid.org/0000-0002-5404-2738
https://orcid.org/0000-0002-4215-0184
AbstractThis work describes the effect of metakaolin on the microstructure and compressive strength of geopolymeric systems based on natural volcanic pozzolans. The effect of the molar ratios of SiO2/Al2O3 and Na2O/Al2O3 and the percentage of metakaolin present in the mixture was studied. The proportion of MK varied between 0 and 30%. A mixture of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) was used as an alkaline activator. The mechanical strength of the geopolymeric pastes and the microstructural properties were evaluated, and techniques such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used. The optimum proportion of MK was 20%, incorporated as a replacement of the natural pozzolan. The results obtained in the present study reveal the possibility of obtaining a geopolymeric cementing material with a compressive strength of up to 68MPa at 28days of curing at room temperature (25±3°C).
HighlightsThe best mechanical behaviour was achieved with 20% MK as replacement of PN.Compressive strength of up to 68MPa was obtained at room temperature.The microstructure of the binary systems PN+MK was more homogeneous and densified.The feasibility of using binary mixtures as geopolymers precursors is demonstrated.
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
https://orcid.org/0000-0002-5404-2738
https://orcid.org/0000-0002-4215-0184
AbstractThis work describes the effect of metakaolin on the microstructure and compressive strength of geopolymeric systems based on natural volcanic pozzolans. The effect of the molar ratios of SiO2/Al2O3 and Na2O/Al2O3 and the percentage of metakaolin present in the mixture was studied. The proportion of MK varied between 0 and 30%. A mixture of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) was used as an alkaline activator. The mechanical strength of the geopolymeric pastes and the microstructural properties were evaluated, and techniques such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used. The optimum proportion of MK was 20%, incorporated as a replacement of the natural pozzolan. The results obtained in the present study reveal the possibility of obtaining a geopolymeric cementing material with a compressive strength of up to 68MPa at 28days of curing at room temperature (25±3°C).
HighlightsThe best mechanical behaviour was achieved with 20% MK as replacement of PN.Compressive strength of up to 68MPa was obtained at room temperature.The microstructure of the binary systems PN+MK was more homogeneous and densified.The feasibility of using binary mixtures as geopolymers precursors is demonstrated.
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
https://orcid.org/0000-0002-5404-2738
https://orcid.org/0000-0002-4215-0184
AbstractThis work describes the effect of metakaolin on the microstructure and compressive strength of geopolymeric systems based on natural volcanic pozzolans. The effect of the molar ratios of SiO2/Al2O3 and Na2O/Al2O3 and the percentage of metakaolin present in the mixture was studied. The proportion of MK varied between 0 and 30%. A mixture of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) was used as an alkaline activator. The mechanical strength of the geopolymeric pastes and the microstructural properties were evaluated, and techniques such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used. The optimum proportion of MK was 20%, incorporated as a replacement of the natural pozzolan. The results obtained in the present study reveal the possibility of obtaining a geopolymeric cementing material with a compressive strength of up to 68MPa at 28days of curing at room temperature (25±3°C).
HighlightsThe best mechanical behaviour was achieved with 20% MK as replacement of PN.Compressive strength of up to 68MPa was obtained at room temperature.The microstructure of the binary systems PN+MK was more homogeneous and densified.The feasibility of using binary mixtures as geopolymers precursors is demonstrated.
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
Robayo-Salazar, Rafael Andrés (Autor:in) / Mejía de Gutiérrez, Ruby (Autor:in) / Puertas, Francisca (Autor:in)
Applied Clay Science ; 132-133 ; 491-497
22.07.2016
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
| Online Contents | 2016
Effect of metakaolin on natural volcanic pozzolan-based geopolymer cement
| Online Contents | 2016
| DOAJ | 2022
Antibacterial Metakaolin-Based Geopolymer Cement
| Springer Verlag | 2017