@article{ART002398223},
author={John J. Bang and KANG SEUNG GU},
title={Study on the immersion test of geopolymers made by recycling of coal ash},
journal={Journal of the Korean Crystal Growth and Crystal Technology},
issn={1225-1429},
year={2018},
volume={28},
number={5},
pages={199-205},
doi={10.6111/JKCGCT.2018.28.5.199}
TY - JOUR
AU - John J. Bang
AU - KANG SEUNG GU
TI - Study on the immersion test of geopolymers made by recycling of coal ash
JO - Journal of the Korean Crystal Growth and Crystal Technology
PY - 2018
VL - 28
IS - 5
PB - The Korea Association Of Crystal Growth, Inc.
SP - 199
EP - 205
SN - 1225-1429
AB - A geopolymer was produced from coal ash generated from an integrated gasification combined cycle (IGCC) plant and its water resistance was evaluated. For this purpose, the geopolymer specimens were immersed in water for 30 days to measure changes in microstructure and alkalinity of the immersion liquid. Particularly, the experiment was carried out with foaming status of the geopolymers and parameters of room temperature aging condition, and immersion time. The foamed geopolymer containing 0.1 wt% Si-sludge had pores with a diameter of 1 to 3 mm and exhibited excellent foamability.
Also, the calcium-silicate-hydrate crystal phase appeared in the foamed geopolymer. In the geopolymer immersion experiment, the pH of the immersion liquid increased with time, because the un-reacted alkali activator remained was dissolved in the immersion liquid. From the pH change of the immersion liquid, it was found that geopolymer reaction in the foamed specimen was completed faster than the non-foamed specimen. Through this study, it was possible to successfully produce foamed and non-foamed geopolymers recycled from IGCC coal ash. Also the necessary data for the safe application of IGCC coal ash-based geopolymers to areas where water resistance is needed were established; for example, the process conditions for room temperature aging time, effect of foaming status, immersion time and so on.
KW - Coal ash;Recycling;Geopolymer;Immersion test;Water resistance
DO - 10.6111/JKCGCT.2018.28.5.199
ER -
John J. Bang and KANG SEUNG GU. (2018). Study on the immersion test of geopolymers made by recycling of coal ash. Journal of the Korean Crystal Growth and Crystal Technology, 28(5), 199-205.
John J. Bang and KANG SEUNG GU. 2018, "Study on the immersion test of geopolymers made by recycling of coal ash", Journal of the Korean Crystal Growth and Crystal Technology, vol.28, no.5 pp.199-205. Available from: doi:10.6111/JKCGCT.2018.28.5.199
John J. Bang, KANG SEUNG GU "Study on the immersion test of geopolymers made by recycling of coal ash" Journal of the Korean Crystal Growth and Crystal Technology 28.5 pp.199-205 (2018) : 199.
John J. Bang, KANG SEUNG GU. Study on the immersion test of geopolymers made by recycling of coal ash. 2018; 28(5), 199-205. Available from: doi:10.6111/JKCGCT.2018.28.5.199
John J. Bang and KANG SEUNG GU. "Study on the immersion test of geopolymers made by recycling of coal ash" Journal of the Korean Crystal Growth and Crystal Technology 28, no.5 (2018) : 199-205.doi: 10.6111/JKCGCT.2018.28.5.199
John J. Bang; KANG SEUNG GU. Study on the immersion test of geopolymers made by recycling of coal ash. Journal of the Korean Crystal Growth and Crystal Technology, 28(5), 199-205. doi: 10.6111/JKCGCT.2018.28.5.199
John J. Bang; KANG SEUNG GU. Study on the immersion test of geopolymers made by recycling of coal ash. Journal of the Korean Crystal Growth and Crystal Technology. 2018; 28(5) 199-205. doi: 10.6111/JKCGCT.2018.28.5.199
John J. Bang, KANG SEUNG GU. Study on the immersion test of geopolymers made by recycling of coal ash. 2018; 28(5), 199-205. Available from: doi:10.6111/JKCGCT.2018.28.5.199
John J. Bang and KANG SEUNG GU. "Study on the immersion test of geopolymers made by recycling of coal ash" Journal of the Korean Crystal Growth and Crystal Technology 28, no.5 (2018) : 199-205.doi: 10.6111/JKCGCT.2018.28.5.199
