Recycling of desulfurization slag for the production of autoclaved aerated concrete

Ying Liang Chen, Ming Sheng Ko, Juu En Chang, Chun Ta Lin

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

The purpose of this study was to reuse desulfurization (De-S) slag in the production of autoclaved aerated concrete (AAC). The non-magnetic fraction of De-S slag is rich in calcium and silicon compounds, and therefore suitable to be an alternative raw material for AAC production. The calcium compounds in the De-S slag used in this study were Ca(OH)2, CaCO3, γ-Ca2SiO4, and CaF2 rather than CaO, and they affected the foaming of AAC mortars due to the insufficient alkalinity. Using 0.17 M NaOH(aq) to replace water or calcining the De-S slag in advance both improved the foaming of mortars, and thus obtained AAC products with stable properties. The formation and morphology of tobermorite in AAC were altered by the addition of De-S slag, probably due to the foreign ions introduced by the slag. The changes in tobermorite should also be related to the decline in the compressive strength of AAC specimens.

原文English
頁(從 - 到)132-140
頁數9
期刊Construction and Building Materials
158
DOIs
出版狀態Published - 2018 1月 15

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 建築與營造
  • 材料科學(全部)

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