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Microwave-thermal-assisted curing method on geopolymer preparation from Panzhihua high-titanium slag by alkali activation
https://orcid.org/0000-0001-9386-5027
https://orcid.org/0009-0002-6599-5179
Highlights Geopolymer based on high-titanium slag from Panzhihua is developed. The geopolymerzation reaction is promoted by the means of microwave radiation. Microwave-thermal-assisted treatment endow the highest geopolymerization degree. Denser microstructures and a desirable mechanical performance are obtained.
Abstract This paper emphasizes the feasibility of using microwave-thermal-assisted treatment to promote the rapid geopolymerzation and early strength improvement of Panzhihua high-titanium slag (HTS)-based geopolymers. The results reveal that the microwave radiation promotes the geopolymerzation reaction of the HTS during the alkaline activation reaction with a remarkable early compressive strength improvement of 623% only in 20 min. Since the dispersed CaTiO3 particles in the HTS serve as local thermal hot spots and nucleation elements, they will rapidly elevate the temperature in a short time and facilitate the hydration products growing to form a gel network structure. Moreover, due to more water evaporation and accelerating effects of the endothermic reaction in the dissolution-polycondensation stage, the optimum process of microwave-thermal-assisted treatment has further advanced the hydration process, which endowed the highest geopolymerization degree, the lowest residue water, the densest microstructures of geopolymeric network and a desirable mechanical performance (54 MPa) of the HTS-based geopolymer.
Microwave-thermal-assisted curing method on geopolymer preparation from Panzhihua high-titanium slag by alkali activation
https://orcid.org/0000-0001-9386-5027
https://orcid.org/0009-0002-6599-5179
Highlights Geopolymer based on high-titanium slag from Panzhihua is developed. The geopolymerzation reaction is promoted by the means of microwave radiation. Microwave-thermal-assisted treatment endow the highest geopolymerization degree. Denser microstructures and a desirable mechanical performance are obtained.
Abstract This paper emphasizes the feasibility of using microwave-thermal-assisted treatment to promote the rapid geopolymerzation and early strength improvement of Panzhihua high-titanium slag (HTS)-based geopolymers. The results reveal that the microwave radiation promotes the geopolymerzation reaction of the HTS during the alkaline activation reaction with a remarkable early compressive strength improvement of 623% only in 20 min. Since the dispersed CaTiO3 particles in the HTS serve as local thermal hot spots and nucleation elements, they will rapidly elevate the temperature in a short time and facilitate the hydration products growing to form a gel network structure. Moreover, due to more water evaporation and accelerating effects of the endothermic reaction in the dissolution-polycondensation stage, the optimum process of microwave-thermal-assisted treatment has further advanced the hydration process, which endowed the highest geopolymerization degree, the lowest residue water, the densest microstructures of geopolymeric network and a desirable mechanical performance (54 MPa) of the HTS-based geopolymer.
Microwave-thermal-assisted curing method on geopolymer preparation from Panzhihua high-titanium slag by alkali activation
https://orcid.org/0000-0001-9386-5027
https://orcid.org/0009-0002-6599-5179
Highlights Geopolymer based on high-titanium slag from Panzhihua is developed. The geopolymerzation reaction is promoted by the means of microwave radiation. Microwave-thermal-assisted treatment endow the highest geopolymerization degree. Denser microstructures and a desirable mechanical performance are obtained.
Abstract This paper emphasizes the feasibility of using microwave-thermal-assisted treatment to promote the rapid geopolymerzation and early strength improvement of Panzhihua high-titanium slag (HTS)-based geopolymers. The results reveal that the microwave radiation promotes the geopolymerzation reaction of the HTS during the alkaline activation reaction with a remarkable early compressive strength improvement of 623% only in 20 min. Since the dispersed CaTiO3 particles in the HTS serve as local thermal hot spots and nucleation elements, they will rapidly elevate the temperature in a short time and facilitate the hydration products growing to form a gel network structure. Moreover, due to more water evaporation and accelerating effects of the endothermic reaction in the dissolution-polycondensation stage, the optimum process of microwave-thermal-assisted treatment has further advanced the hydration process, which endowed the highest geopolymerization degree, the lowest residue water, the densest microstructures of geopolymeric network and a desirable mechanical performance (54 MPa) of the HTS-based geopolymer.
Microwave-thermal-assisted curing method on geopolymer preparation from Panzhihua high-titanium slag by alkali activation
Yang, Yuanyi (author) / Li, Caiying (author) / Li, Hui (author) / Bai, Caoyuan (author) / Wang, Zuowen (author) / Yang, Tingting (author) / Gu, Tao (author)
2023-07-25
Article (Journal)
Electronic Resource
English
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