IMMOBILIZATION OF SLAG MATERIAL BY FOAM BITUMEN

To immobilize the heavy metals in zinc slags used as basecourse material in roads, the foam bitumen technique was used in a research program in the village of Budel in the Netherlands. By using foam bitumen the fine particles in the zinc slag are encapsulated, thus immobilizing the pollutants in the slag. After a brief discussion of the principle of the foam bitumen process, the research activities of the Budel project are discussed. The environmental test procedure was split into two parts: production control and percolate control. The production control included analysis of particle size and total composition, determination of maximum leachability, large and small column tests, and a stand test. To check the quantity and composition of the leachate and the degree of emission of heavy metals from immobilized zinc slag to soil and groundwater, a special percolate system was adopted. This system consisted of percolate containers positioned in the road to collect the percolate. Sampling results are discussed and it is concluded that heavy metals in zinc slag are very well fixed and the immobilization effect is more than 95%. For the covering abstract of the conference see IRRD 869363.

Language

  • English

Media Info

  • Pagination: p. 239-46

Subject/Index Terms

Filing Info

  • Accession Number: 00675808
  • Record Type: Publication
  • Source Agency: DIENST WEG- EN WATERBOUWKUNDE (DWW)
  • ISBN: 0-444-81853-7
  • Files: ITRD
  • Created Date: Apr 12 1995 12:00AM