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Titel:
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Chemical durability of stabilized materials
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
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1995
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ECN publicatienummer:
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Publicatie type:
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ECN-C--94-104
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ECN rapport
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Aantal pagina's:
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Volledige tekst:
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35
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Niet beschikbaar.
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Samenvatting:
In the framework of the activities of CUR commission D12 'Immobilisatie'the role of the chemical durability of stabilized materials in contact with
the natural surrounding (soil or liners, atmosphere) was identified as an
important aspect in relation to the release rate of contaminants to the
environment. A project description was considered too premature in view of
the limited amount of information on the magnitude of the effects. In this
work the various effects in the waste-soil(liner) interaction are discussed
and an estimate of the magnitude of effects on specific constituents or on
constituents of concern is given. Aspects not addressed in current regulatory
tests are changes in pH due to carbonation, changes in reducing properties of
materials, the role of water transport or lack thereof, interface
precipitation and interface sealing processes. Several of these factors may
lead to order of magnitude differences in release, which implies that they
become crucial for environmental impact control. In many cases, the materials
can be managed such as to reduce the potential risk once the key controlling
factors are sufficiently known. In the framework of this study the
possibilities for international cooperation have been evaluated. Although
this topic is discussed here in the context of immobilization, the phenomena
addressed are equally relevant to conventional construction materials. The
magnitude of the effects will, however, be larger in case of immobilized
materials. 12 figs., 1 tab., 22 refs.
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