Building component containing coal ash

Details Building component containing coal ash Building component containing coal ash

1991-01-22

1992-10-06

Lewis, Michael

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106405, 106707, 106709, 106DIG1, C04B 726

Patent

active

051528371

ABSTRACT:
Described is the process for forming a hardenable mixture of a coal ash comprising free CaO and free CaSO.sub.4.0 H.sub.2 O.
In order to remove all free CaO the coal ash is mixed with a fly-ash comprising essentially no free CaO and no free CaSO.sub.4.0 H.sub.2 O and water and subsequently subjected to a heat treatment.
By removal of free CaO it is found that the strength of hardened granules formed from such ash mixture does not deteriorate as is the case from granules formed with a coal ash comprising free CaO.
Also a process for forming hardened granules and a building component formed with use of a hardenable mixture according to the invention are described.

REFERENCES:
patent: 4624711 (1986-11-01), Styron
patent: 4741782 (1988-05-01), Styron
patent: 4741834 (1988-05-01), Spangle et al.
patent: 4780144 (1988-10-01), Loggers
patent: 5002611 (1991-05-01), Rademaker

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