Document Detail

Optimization of the solidification/stabilization process of MSW fly ash in cementitious matrices.
MedLine Citation:
PMID:  10611428     Owner:  NLM     Status:  MEDLINE    
The solidification/stabilization (S/S) process of municipal solid waste (MSW) fly ash in cementitious matrices was investigated in order to ascertain the feasibility of a washing pretreatment of fly ash with water as a means of maximizing the ash content of cementitious mixtures. Four types of fly ash resulting from different Italian MSW incineration plants and ASTM Type III Portland cement were used in this study. Ash-cement mixtures with different fly ash/cement (FA/C) ratios were made using untreated and washed fly ash. Washing of fly ash with water was realized by a two-stage treatment (liquid/solid=25; mixing time=15 min for each stage). The cementitious mixtures were characterized for water demand, setting time, mechanical strength, and heavy metals leachability. Comparison between the above properties of mixtures incorporating untreated and washed fly ash (particularly, setting characteristics), coupled with economical evaluation of the S/S process when applied to untreated and washed fly ash, proved the feasibility of washing pretreatment as a means of maximizing the incorporation of MSW fly ash in cementitious matrices (ash content up to 75%-90% by weight of total solid).
T Mangialardi; A E Paolini; A Polettini; P Sirini
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of hazardous materials     Volume:  70     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  1999 Dec 
Date Detail:
Created Date:  2000-01-12     Completed Date:  2000-01-12     Revised Date:  2006-06-14    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  53-70     Citation Subset:  IM    
University of Rome "La Sapienza", Faculty of Engineering, Rome, Italy.
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MeSH Terms
Air Pollution / prevention & control*
Metals, Heavy / pharmacokinetics
Refuse Disposal / methods*
Water / chemistry
Reg. No./Substance:
0/Metals, Heavy; 7732-18-5/Water

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