Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Exploring the role of slag in hydration of carbonation-cured slag cements
https://orcid.org/0000-0003-0746-3940
Abstract This study investigates the role of slag in the hydration and carbonation of carbonation-cured slag cements. Slag-blended cement paste samples with slag contents of 0, 10 %, 30 % and 50 % were carbonation-cured for up to 28 days. The result revealed an increase in the carbonation depth to 20 mm with prolonged curing time and higher slag content facilitated greater carbonation penetration. The CaO content did not adversely affect the final CO2 uptake capacity; rather, an optimal slag content of 10 % slag replacement enhanced CO2 uptake, forming 57.4 g of CaCO3 on the surface after 28 days of carbonation curing, while PS30, PS50 and P100 formed 52.2 g, 45.2 g and 43.4 g, respectively, though higher slag levels accelerated the carbonation rate. Moreover, slag hydration led to Ca2+ ion consumption and subsequent reduction in portlandite content. The extent of belite reaction was significantly improved in the slag-blended cements, providing a source for enhanced CO2 binding capacity in the blended cements. These findings contribute to improved understanding of behavior of blended cements prepared by carbonation-curing, enabling the development of more sustainable and durable concrete structures.
Highlights The role of slag in hydration of carbonation-cured slag cements was studied. Increased slag content in blended PC enhances carbonation depth, especially with prolonged curing. Optimizing slag content increases CO2 uptake capacity, making it essential for sustainable construction. Slag content enhances belite dissolution rate, resulting in higher CO2 binding capacity in slag-blended PC.
Exploring the role of slag in hydration of carbonation-cured slag cements
https://orcid.org/0000-0003-0746-3940
Abstract This study investigates the role of slag in the hydration and carbonation of carbonation-cured slag cements. Slag-blended cement paste samples with slag contents of 0, 10 %, 30 % and 50 % were carbonation-cured for up to 28 days. The result revealed an increase in the carbonation depth to 20 mm with prolonged curing time and higher slag content facilitated greater carbonation penetration. The CaO content did not adversely affect the final CO2 uptake capacity; rather, an optimal slag content of 10 % slag replacement enhanced CO2 uptake, forming 57.4 g of CaCO3 on the surface after 28 days of carbonation curing, while PS30, PS50 and P100 formed 52.2 g, 45.2 g and 43.4 g, respectively, though higher slag levels accelerated the carbonation rate. Moreover, slag hydration led to Ca2+ ion consumption and subsequent reduction in portlandite content. The extent of belite reaction was significantly improved in the slag-blended cements, providing a source for enhanced CO2 binding capacity in the blended cements. These findings contribute to improved understanding of behavior of blended cements prepared by carbonation-curing, enabling the development of more sustainable and durable concrete structures.
Highlights The role of slag in hydration of carbonation-cured slag cements was studied. Increased slag content in blended PC enhances carbonation depth, especially with prolonged curing. Optimizing slag content increases CO2 uptake capacity, making it essential for sustainable construction. Slag content enhances belite dissolution rate, resulting in higher CO2 binding capacity in slag-blended PC.
Exploring the role of slag in hydration of carbonation-cured slag cements
https://orcid.org/0000-0003-0746-3940
Abstract This study investigates the role of slag in the hydration and carbonation of carbonation-cured slag cements. Slag-blended cement paste samples with slag contents of 0, 10 %, 30 % and 50 % were carbonation-cured for up to 28 days. The result revealed an increase in the carbonation depth to 20 mm with prolonged curing time and higher slag content facilitated greater carbonation penetration. The CaO content did not adversely affect the final CO2 uptake capacity; rather, an optimal slag content of 10 % slag replacement enhanced CO2 uptake, forming 57.4 g of CaCO3 on the surface after 28 days of carbonation curing, while PS30, PS50 and P100 formed 52.2 g, 45.2 g and 43.4 g, respectively, though higher slag levels accelerated the carbonation rate. Moreover, slag hydration led to Ca2+ ion consumption and subsequent reduction in portlandite content. The extent of belite reaction was significantly improved in the slag-blended cements, providing a source for enhanced CO2 binding capacity in the blended cements. These findings contribute to improved understanding of behavior of blended cements prepared by carbonation-curing, enabling the development of more sustainable and durable concrete structures.
Highlights The role of slag in hydration of carbonation-cured slag cements was studied. Increased slag content in blended PC enhances carbonation depth, especially with prolonged curing. Optimizing slag content increases CO2 uptake capacity, making it essential for sustainable construction. Slag content enhances belite dissolution rate, resulting in higher CO2 binding capacity in slag-blended PC.
Exploring the role of slag in hydration of carbonation-cured slag cements
Belayneh, Geta Bekalu (Autor:in) / Seifu, Melaku N. (Autor:in) / Kim, Hyeong-Ki (Autor:in) / Son, H.M. (Autor:in) / Park, Solmoi (Autor:in)
03.01.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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