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A platform for research: civil engineering, architecture and urbanism
Effect of calcium hydroxide on fresh state behavior of sodium carbonate activated blast furnace slag pastes
https://orcid.org/0000-0003-1484-7758
Highlights Early age CO3 2− concentration in pore solution is indicative in terms of setting. A longer setting time can be reduced efficiently with slaked lime. CO3 2− concentration is the major parameter that affects sodium carbonate-activated GGBS. Replacing sodium carbonate with sodium hydroxide improves the rheology but extends the setting time. The rheological properties depend on the activator type and amount used.
Abstract This study represents the fresh state behavior of Na2CO3-activated ground granulated blast furnace slag (GGBS) pastes. Sodium carbonate (NC) is a suitable activator, though with an extended setting time. To accelerate the hydration process, NC was replaced with sodium hydroxide (NH), then, slaked lime (CH) was used as a carbonate binding agent. This replacement improved the rheological properties, but increased the setting time. The use of 3% CH with GGBS caused a significant decrease in setting time, enabled to set within 6.5 h. The decrement was attributed to the removal of a large amount of dissolved carbonate ions from the fresh state pastes. The NH replacement did not effectively enhance the fresh properties. In the pore solution, the CO3 2− ion concentration is one of the major parameter that affects the reaction besides other ions released from raw material.
Effect of calcium hydroxide on fresh state behavior of sodium carbonate activated blast furnace slag pastes
https://orcid.org/0000-0003-1484-7758
Highlights Early age CO3 2− concentration in pore solution is indicative in terms of setting. A longer setting time can be reduced efficiently with slaked lime. CO3 2− concentration is the major parameter that affects sodium carbonate-activated GGBS. Replacing sodium carbonate with sodium hydroxide improves the rheology but extends the setting time. The rheological properties depend on the activator type and amount used.
Abstract This study represents the fresh state behavior of Na2CO3-activated ground granulated blast furnace slag (GGBS) pastes. Sodium carbonate (NC) is a suitable activator, though with an extended setting time. To accelerate the hydration process, NC was replaced with sodium hydroxide (NH), then, slaked lime (CH) was used as a carbonate binding agent. This replacement improved the rheological properties, but increased the setting time. The use of 3% CH with GGBS caused a significant decrease in setting time, enabled to set within 6.5 h. The decrement was attributed to the removal of a large amount of dissolved carbonate ions from the fresh state pastes. The NH replacement did not effectively enhance the fresh properties. In the pore solution, the CO3 2− ion concentration is one of the major parameter that affects the reaction besides other ions released from raw material.
Effect of calcium hydroxide on fresh state behavior of sodium carbonate activated blast furnace slag pastes
https://orcid.org/0000-0003-1484-7758
Highlights Early age CO3 2− concentration in pore solution is indicative in terms of setting. A longer setting time can be reduced efficiently with slaked lime. CO3 2− concentration is the major parameter that affects sodium carbonate-activated GGBS. Replacing sodium carbonate with sodium hydroxide improves the rheology but extends the setting time. The rheological properties depend on the activator type and amount used.
Abstract This study represents the fresh state behavior of Na2CO3-activated ground granulated blast furnace slag (GGBS) pastes. Sodium carbonate (NC) is a suitable activator, though with an extended setting time. To accelerate the hydration process, NC was replaced with sodium hydroxide (NH), then, slaked lime (CH) was used as a carbonate binding agent. This replacement improved the rheological properties, but increased the setting time. The use of 3% CH with GGBS caused a significant decrease in setting time, enabled to set within 6.5 h. The decrement was attributed to the removal of a large amount of dissolved carbonate ions from the fresh state pastes. The NH replacement did not effectively enhance the fresh properties. In the pore solution, the CO3 2− ion concentration is one of the major parameter that affects the reaction besides other ions released from raw material.
Effect of calcium hydroxide on fresh state behavior of sodium carbonate activated blast furnace slag pastes
Akturk, Busra (author) / Kizilkanat, Ahmet B. (author) / Kabay, Nihat (author)
Construction and Building Materials ; 212 ; 388-399
2019-03-29
12 pages
Article (Journal)
Electronic Resource
English
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