Process for making high-strength synthetic aggregates

Details Process for making high-strength synthetic aggregates Process for making high-strength synthetic aggregates

1993-01-28

1994-11-15

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264117, 106405, 106705, B29C 6702

Patent

active

053645723

ABSTRACT:
A process for making high-strength aggregates including hydrating calcium oxide containing coal combustion ash for a sufficient period of time to convert a high percentage of the calcium oxide to calcium hydroxide prior to forming the aggregates and curing the aggregates in high humidity. The moisture of the hydrated material is monitored to vary the hydration moisture to the desired set point. Further, the process involves producing high-strength aggregates from calcium hydroxide containing FGD ashes such as generated from duct sorbent injection and spray dryer processes.

REFERENCES:
patent: 4377414 (1983-03-01), Buschmann et al.
patent: 4490178 (1984-12-01), Loggers et al.
patent: 4880582 (1989-11-01), Spanjer et al.
patent: 5002611 (1991-03-01), Rademaker
patent: 5033953 (1991-07-01), Holley
patent: 5137753 (1992-08-01), Bland et al.
patent: 5173232 (1992-12-01), Holley

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