Synthetic aggregate compositions derived from spent bed material

Details Synthetic aggregate compositions derived from spent bed material Synthetic aggregate compositions derived from spent bed material

1993-04-15

1994-09-27

Green, Anthony

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Measuring a weight or volume

264 42, 264140, 264141, 2641761, 26421111, 26421112, 26421113, 264333, 264DIG49, 106707, 106710, 106DIG1, 436148, 436164, 436182, B29C 4700, C04B 712

Patent

active

053505492

ABSTRACT:
Cementitious compositions useful as lightweight aggregates are formed from a blend of spent bed material from fluidized bed combustion and fly ash. The proportions of the blend are chosen so that ensuing reactions eliminate undesirable constituents. The blend is then mixed with water and formed into a shaped article. The shaped article is preferably either a pellet or a "brick" shape that is later crushed. The shaped articles are cured at ambient temperature while saturated with water. It has been found that if used sufficiently, the resulting aggregate will exhibit minimal dimensional change over time. The aggregate can be certified by also forming standardized test shapes, e.g., cylinders while forming the shaped articles and measuring the properties of the test shapes using standardized techniques including X-ray diffraction.

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Quartely Tecnnical Progress Report-"Development of Potential Uses for the Residue from Fluidized Bed Combustion Processes," prepared by L. John Minnick for U.S. Department of Energy, Jun. through Aug., 1981.

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