Properties of Self-hardened Inorganic Coating in the System Alumina-Silica-Calcium Oxide by the Reaction with Alkalies

Jeon, Chang-Seob; Song, Tea-Woong

doi:10.4191/kcers.2010.47.5.381

Journal of the Korean Ceramic Society

2010

DOI: 10.4191/kcers.2010.47.5.381

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Properties of Self-hardened Inorganic Coating in the System Alumina-Silica-Calcium Oxide by the Reaction with Alkalies

Chang-Seob Jeon¹,

Tea-Woong Song²

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Cited by 2 publications

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Effect of Curing Temperature on Geopolymeric Polycondensation of Blast Furnace Slag

Jeon¹,

Song²

2011

Journal of the Korean Ceramic Society

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The effect of curing temperature on basic geopolymeric reactivity and hardening behaviour of blast furnace slag were investigated using the mixture of pulverized slag and several alkaline solutions of relatively high concentration. For the pastes prepared at several different temperatures between 20 o C and 90 o C, setting time and heat of reaction were examined while mineralogical and morphological examinations were performed for the hardened paste after curing period at same temperature. The geopolymeric reaction of slag was revealed to be accelerated strongly according to the curing temperature regardless of the sort and concentration of the alkaline solution. The increase of concentration of the alkaline solution within 9 M and the existence of silicic ion in the solution also promoted the reaction severely. The mineral component and their ratio of the hardened paste were revealed to be influenced by the chemical species and silicic ion contained in alkaline solution rather than by the curing temperature. The higher temperature and longer period of curing stage were effective for the sustained formation of geopolymer and succeed improvement of density and uniformity of morphology of the final hardened body.

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Effect of Curing Temperature on Geopolymeric Polycondensation of Blast Furnace Slag

Jeon¹,

Song²

2011

Journal of the Korean Ceramic Society

Self Cite

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Effect of the Heating Temperature on the Alkali-activation Reaction of Calcined Kaolin Powder

Kim¹,

Song²

2012

Journal of the Korean Ceramic Society

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The alkali-activation reaction of two types of typical kaolin calcined at various lower temperatures was investigated at room temperature and at elevated temperatures. For the assessment of the reactivity, the temperature increase and the setting time of pastes prepared with calcined kaolin and sodium/potassium hydroxide solution were measured. Unlike raw kaolin, calcined kaolin samples prepared at various temperature showed an alkali-activation reaction according to the different aspects of the changes in the mineral phases. The reactivity with alkaline solutions was exceedingly activated in the samples calcined at 600-650 o C, but the reactivity gradually decreased as the temperature increased in a higher temperature range, most likely due to the changes in the crystal structure of the dehydrated kaolin. The activation effect of the calcination treatment was achieved at reaction temperatures that exceeded 60 o C and was enhanced as the temperature increased. The reactivity of the calcined kaolin with an alkaline solution was more enhanced with the solution of a higher concentration and with a solution prepared from sodium hydroxide rather than potassium hydroxide.

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Properties of Self-hardened Inorganic Coating in the System Alumina-Silica-Calcium Oxide by the Reaction with Alkalies

Cited by 2 publications

References 4 publications

Effect of Curing Temperature on Geopolymeric Polycondensation of Blast Furnace Slag

Effect of Curing Temperature on Geopolymeric Polycondensation of Blast Furnace Slag

Effect of the Heating Temperature on the Alkali-activation Reaction of Calcined Kaolin Powder

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