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Korean Journal of Chemical Engineering

, Volume 18, Issue 5, pp 668–672 | Cite as

The improvement of the mechanical stability and leachability of bituminized waste form of radioactive ash by addition of reused polyethylene

  • Jong-Sik Shon
  • Sung-Ho Lee
  • Hee-Seoung Park
  • Kil-Jeong Kim
  • Duck-Kee Min
Article

Abstract

This study was carried out in order to produce bituminized waste forms, which have dimensional and mechanical stability like cement-based waste forms. This paper reports the effects of adding polyethylene (PE) to the bituminized waste form. The additive used for the experiment was the spent PE generated from agricultural use. The bitumen used in the sample preparation is straight-run distillation bitumen of penetration 60/70 (paving asphalt). The waste used for the experiment was a bottom ash generated from an industrial (inactive) waste incinerator. Bituminized waste forms with PE contents of 5 wt% or more resulted in maintaining dimensional and mechanical stability. The compressive strength and softening point of bituminized waste forms increase in proportion to the amount of additional PE. The leaching test using ANS 16.1 shows that the principal leaching mechanism of elements (Cs, Sr, Co) from bituminized waste forms is diffusion. Furthermore, it is demonstrated that additive PE of 5-10 wt% does not change the leaching mechanism, and bituminized waste forms maintain a high leach resistance.

Key words

Bituminized Waste Forms Polyethylene Radioactive Waste Bituminization 

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Copyright information

© Korean Institute of Chemical Engineering 2001

Authors and Affiliations

  • Jong-Sik Shon
    • 1
  • Sung-Ho Lee
    • 1
  • Hee-Seoung Park
    • 1
  • Kil-Jeong Kim
    • 1
  • Duck-Kee Min
    • 1
  1. 1.KAERIDaejeonKorea

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