Fireproofing Material from Alkali-activated EAF Ladle Slag

Pai Haung Shih, Dong Shyuan Lu, Ho Sheng Tsai, Juin Ting Wu, Juu-En Chang

研究成果: Paper

摘要

Electric Arc Furnace Steel-making process has become one of the primary steel providing processes in Taiwan. Nevertheless, the potential soundness problem due to the free-CaO content has made EAF ladle slag (LS) limited the reuse of EAF LS. This research attempts to fireproofing porous material from LS by alkali-activated process. Sampled LS was tested for physical properties and Chemical composition analysis. The results showed that LS could be reuse as cementitious or pozzolanic material. Nevertheless, further accelerated mortar bar test and autoclave expansion suggested that f-CaO content in LS transformed into Ca(OH)2 in hydration late stage, and resulted in volume expansion with failure in meeting the soundness criteria. Alkali-activation technique could directly transform f-CaO content in LS into Calcium Silicate hydrate. Hence, Alkali-activated LS (AALS) would not have the Ca(OH)2 expansion and cracked problem. Further application of foaming agent could develop porous materials with density as low as 800 kg/m3. With this porous AALS process, light-weight fire-proofing partition wall utilization reuse of LS could be developed.

原文English
出版狀態Published - 2017 一月 1
事件14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017 - Sapporo, Hokkaido, Japan
持續時間: 2017 九月 262017 九月 29

Conference

Conference14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017
國家Japan
城市Sapporo, Hokkaido
期間17-09-2617-09-29

指紋

slag
steel
material
mortar
hydration
transform
silicate
physical property
calcium
chemical composition

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

引用此文

Shih, P. H., Lu, D. S., Tsai, H. S., Wu, J. T., & Chang, J-E. (2017). Fireproofing Material from Alkali-activated EAF Ladle Slag. 論文發表於 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.
Shih, Pai Haung ; Lu, Dong Shyuan ; Tsai, Ho Sheng ; Wu, Juin Ting ; Chang, Juu-En. / Fireproofing Material from Alkali-activated EAF Ladle Slag. 論文發表於 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.
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abstract = "Electric Arc Furnace Steel-making process has become one of the primary steel providing processes in Taiwan. Nevertheless, the potential soundness problem due to the free-CaO content has made EAF ladle slag (LS) limited the reuse of EAF LS. This research attempts to fireproofing porous material from LS by alkali-activated process. Sampled LS was tested for physical properties and Chemical composition analysis. The results showed that LS could be reuse as cementitious or pozzolanic material. Nevertheless, further accelerated mortar bar test and autoclave expansion suggested that f-CaO content in LS transformed into Ca(OH)2 in hydration late stage, and resulted in volume expansion with failure in meeting the soundness criteria. Alkali-activation technique could directly transform f-CaO content in LS into Calcium Silicate hydrate. Hence, Alkali-activated LS (AALS) would not have the Ca(OH)2 expansion and cracked problem. Further application of foaming agent could develop porous materials with density as low as 800 kg/m3. With this porous AALS process, light-weight fire-proofing partition wall utilization reuse of LS could be developed.",
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Shih, PH, Lu, DS, Tsai, HS, Wu, JT & Chang, J-E 2017, 'Fireproofing Material from Alkali-activated EAF Ladle Slag', 論文發表於 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan, 17-09-26 - 17-09-29.

Fireproofing Material from Alkali-activated EAF Ladle Slag. / Shih, Pai Haung; Lu, Dong Shyuan; Tsai, Ho Sheng; Wu, Juin Ting; Chang, Juu-En.

2017. 論文發表於 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.

研究成果: Paper

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AU - Shih, Pai Haung

AU - Lu, Dong Shyuan

AU - Tsai, Ho Sheng

AU - Wu, Juin Ting

AU - Chang, Juu-En

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Electric Arc Furnace Steel-making process has become one of the primary steel providing processes in Taiwan. Nevertheless, the potential soundness problem due to the free-CaO content has made EAF ladle slag (LS) limited the reuse of EAF LS. This research attempts to fireproofing porous material from LS by alkali-activated process. Sampled LS was tested for physical properties and Chemical composition analysis. The results showed that LS could be reuse as cementitious or pozzolanic material. Nevertheless, further accelerated mortar bar test and autoclave expansion suggested that f-CaO content in LS transformed into Ca(OH)2 in hydration late stage, and resulted in volume expansion with failure in meeting the soundness criteria. Alkali-activation technique could directly transform f-CaO content in LS into Calcium Silicate hydrate. Hence, Alkali-activated LS (AALS) would not have the Ca(OH)2 expansion and cracked problem. Further application of foaming agent could develop porous materials with density as low as 800 kg/m3. With this porous AALS process, light-weight fire-proofing partition wall utilization reuse of LS could be developed.

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Shih PH, Lu DS, Tsai HS, Wu JT, Chang J-E. Fireproofing Material from Alkali-activated EAF Ladle Slag. 2017. 論文發表於 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.