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Title:
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Emissie van vluchtige organische verbindingen uit immobilisaten
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Author(s):
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Published by:
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Publication date:
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ECN
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1995
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ECN report number:
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Document type:
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ECN-C--95-005
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ECN publication
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Number of pages:
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Full text:
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51
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Download PDF
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Abstract:
The results of an experimental study on the emission of volatile organiccompounds (VOC) via gas phase transport before, during and after cementation
processes is presented. Use has been made of Portland A cement, with and
without active carbon addition. Loss of VOC before and during curing of the
cementous product is considerable (40-70%). Cement does not immobilize VOC,
with the exception of naphthalene which is retained to a minor extent.
immobilization of VOC improves significantly in case VOCs are adsorbed onto
active carbon granules before cementing. Therefore, the cement/active carbon
material can be used for defining optimal conditions for the VOC availability
test. After 28 days curing, cement/active carbon products have been applied
in the VOC availability test. It was observed that no further decrease in VOC
concentrations in the material could be detected after 15 days. Based on the
experimental results, a text proposal is given for the laboratory
determination of VOC availability from immobilized products. A VOC emission
test was performed for 3 cylindrical cement products (without active carbon
addition). VOC emissions were found to be strongly related to product
dimension. For all products no further emission of VOC could be detected
after 12 days. The final VOC concentrations in the lager test products are
significantly higher as compared to the VOC availability. In general, VOC
recovery was lower than 30%. No satisfactory explanation could be given for
the low VOC recoveries. Therefore, a text proposal for a laboratory VOC
emission test is not given. 6 figs., 8 tabs., 1 appendix, 8 refs.
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