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Waste Management & Research
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*ARSENIC COMPOUNDS
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Impact of the use of waste on trace element concentrations in cement and concrete

Matthias Achternbosch

Forschungszentrum Karlsruhe, Karlsruhe, Germany, Matthias.Achternbosch{at}itas.fzk.de

Klaus-Rainer Bräutigam

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Nicola Hartlieb

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Christel Kupsch

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Ulf Richers

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Peter Stemmermann

Forschungszentrum Karlsruhe, Karlsruhe, Germany

The results of model calculations carried out to identify and quantify the input pathways of trace elements into cement and concrete and to estimate the extent to which trace element concentrations in cement may change due to waste utilization are presented. As expected, primary raw materials represented the most important input pathway for trace elements into cement, but the contribution from wastes was not negligible. The use of waste led to a slight increase of the concentrations of cadmium, antimony and zinc in cement. For cobalt, lead and vanadium, this increase was less distinct and for all other trace elements considered, the effect of the use of wastes on trace element concentrations in cement could not be demonstrated clearly. The trace element content of concrete was governed by the aggregates for most elements considered. However, for arsenic, cadmium, lead and zinc, both cement and the additive coal fly ash contributed noticeably to the total trace element concentration in the concrete.

Key Words: Cement • cement production • concrete • secondary raw materials • secondary fuels • waste • concrete additives • material flow analyses • model calculations • trace elements • trace element concentration • wmr 776-8

Waste Management & Research, Vol. 23, No. 4, 328-337 (2005)
DOI: 10.1177/0734242X05056075
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