Utilization of electric arc furnace oxidizing slag in construction materials

Hsin Han Hsieh, Chao Shi Chen, Shih Yin Chang, Shih Hsien Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The electric arc furnace oxidizing slag (EOS) is the by-product produced in the steelmaking process. The amount of EOS production through the process is very large. If it is disposed in the environment, the exposed EOS may cause severe damage to the surrounding. The EOS has the potential of replacement for construction materials. However, a large amount of lime is added to the steelmaking process to release free calcium oxide (f-CaO). The calcium hydroxide (Ca(OH)2) which produced by calcium oxide hydration after a long time may cause material volume expansion which result in the disadvantage effects on volumetric stability. According to various experiments on volumetric stability in this study, the average content of the free calcium oxide in the fine EOS is 0.64% and the average content the free calcium oxide in the coarse EOS is extremely low. The test result is determined by the ethylene glycol method. The EOS is made into cement mortar bars (water:cement:EOS = 0.5:1:3), the results showed that the cement mortar bars cracked after autoclave expansion test. The volumetric stability of the EOS is unqualified.

Original languageEnglish
Title of host publicationComposite Materials and Material Engineering III
EditorsKazuo Umemura
PublisherTrans Tech Publications Ltd
Pages430-435
Number of pages6
ISBN (Print)9783035714913
DOIs
Publication statusPublished - 2019
Event4th International Conference on Composite Materials and Materials Engineering, ICCMME 2019 - Tokyo, Japan
Duration: 2019 Jan 192019 Jan 22

Publication series

NameKey Engineering Materials
Volume801 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference4th International Conference on Composite Materials and Materials Engineering, ICCMME 2019
CountryJapan
CityTokyo
Period19-01-1919-01-22

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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