Ordinary portland cement based solidification of toxic wastes: The role of OPC reviewed
- Imperial College of Science Technology and Medicine, London (United Kingdom)
A mixed waste stream, which is commercially solidified, has been solidified in the laboratory using OPC and PFA (pulverized fly ash) in a variety of mix proportions. The solidified products have been subjected to calorimetric, physical and microstructural analysis. The heat of hydration for OPC/waste mixes showed that a progressive poisoning of normal hydration reactions occurred with increasing waste addition. Once poisoned OPC failed to act as a cement and was substituted by PFA and other products in this role. Strength development was found to be related to the heat of hydration; this suggests that conduction calorimetry could be used to determine the suitability of a particular waste for OPC based solidification.
- OSTI ID:
- 6292284
- Journal Information:
- Cement and Concrete Research; (United States), Vol. 23:1; ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HAZARDOUS MATERIALS
SOLIDIFICATION
TOXIC MATERIALS
CALORIMETRY
FEASIBILITY STUDIES
FLY ASH
HYDRATION
MEASURING METHODS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHYSICAL PROPERTIES
POISONING
PORTLAND CEMENT
REACTION HEAT
WASTE PRODUCT UTILIZATION
AEROSOL WASTES
ASHES
BUILDING MATERIALS
CEMENTS
COMBUSTION PRODUCTS
ENTHALPY
MATERIALS
PHASE TRANSFORMATIONS
RESIDUES
SOLVATION
THERMODYNAMIC PROPERTIES
WASTES
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management