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Fly ash aggregates. Vliegaskunstgrind

Technical Report:

Abstract

A study has been carried out into artificial aggregates made from fly ash, 'fly ash aggregates'. Attention has been drawn to the production of fly ash aggregates in the Netherlands as a way to obviate the need of disposal of fly ash. Typical process steps for the manufacturing of fly ash aggregates are the agglomeration and the bonding of fly ash particles. Agglomeration techniques are subdivided into agitation and compaction, bonding methods into sintering, hydrothermal and 'cold' bonding. In sintering no bonding agent is used. The fly ash particles are more or less welded together. Sintering in general is performed at a temperature higher than 900 deg C. In hydrothermal processes lime reacts with fly ash to a crystalline hydrate at temperatures between 100 and 250 deg C at saturated steam pressure. As a lime source not only lime as such, but also portland cement can be used. Cold bonding processes rely on reaction of fly ash with lime or cement at temperatures between 0 and 100 deg C. The pozzolanic properties of fly ash are used. Where cement is applied, this bonding agent itself contributes also to the strength development of the artificial aggregate. Besides the use of lime  More>>
Authors:
Publication Date:
Mar 01, 1983
Product Type:
Technical Report
Report Number:
INTRON-83006
Reference Number:
ERA-10-004204; EDB-85-018544
Subject:
01 COAL, LIGNITE, AND PEAT; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; FLY ASH; SINTERING; WASTE PRODUCT UTILIZATION; BONDING; BUILDING MATERIALS; CALCIUM OXIDES; CEMENTS; COAL; COST; ECONOMICS; MANUFACTURING; MARKETING RESEARCH; MECHANICAL PROPERTIES; NETHERLANDS; PRODUCTION; AEROSOL WASTES; ALKALINE EARTH METAL COMPOUNDS; ASHES; CALCIUM COMPOUNDS; CARBONACEOUS MATERIALS; CHALCOGENIDES; ENERGY SOURCES; EUROPE; FABRICATION; FOSSIL FUELS; FUELS; JOINING; MATERIALS; OXIDES; OXYGEN COMPOUNDS; RESIDUES; WASTES; WESTERN EUROPE; 010800* - Coal, Lignite, & Peat- Waste Management; 015000 - Coal, Lignite, & Peat- Economic, Industrial, & Business Aspects; 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management
OSTI ID:
6084280
Research Organizations:
INTRON B.V., Maastricht (Netherlands)
Country of Origin:
Netherlands
Language:
Dutch
Availability:
INTRON B.V., Maastricht, Netherlands.
Submitting Site:
HEDB
Size:
Pages: 201
Announcement Date:

Technical Report:

Citation Formats

Not Available. Fly ash aggregates. Vliegaskunstgrind. Netherlands: N. p., 1983. Web.
Not Available. Fly ash aggregates. Vliegaskunstgrind. Netherlands.
Not Available. 1983. "Fly ash aggregates. Vliegaskunstgrind." Netherlands.
@misc{etde_6084280,
title = {Fly ash aggregates. Vliegaskunstgrind}
author = {Not Available}
abstractNote = {A study has been carried out into artificial aggregates made from fly ash, 'fly ash aggregates'. Attention has been drawn to the production of fly ash aggregates in the Netherlands as a way to obviate the need of disposal of fly ash. Typical process steps for the manufacturing of fly ash aggregates are the agglomeration and the bonding of fly ash particles. Agglomeration techniques are subdivided into agitation and compaction, bonding methods into sintering, hydrothermal and 'cold' bonding. In sintering no bonding agent is used. The fly ash particles are more or less welded together. Sintering in general is performed at a temperature higher than 900 deg C. In hydrothermal processes lime reacts with fly ash to a crystalline hydrate at temperatures between 100 and 250 deg C at saturated steam pressure. As a lime source not only lime as such, but also portland cement can be used. Cold bonding processes rely on reaction of fly ash with lime or cement at temperatures between 0 and 100 deg C. The pozzolanic properties of fly ash are used. Where cement is applied, this bonding agent itself contributes also to the strength development of the artificial aggregate. Besides the use of lime and cement, several processes are known which make use of lime containing wastes such as spray dry absorption desulfurization residues or fluid bed coal combustion residues. (In Dutch)}
place = {Netherlands}
year = {1983}
month = {Mar}
}