Process for making high-strength synthetic aggregates
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United States of America Patent
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Nov 15, 1994
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N/A
app pub date -
Jan 28, 1993
filing date -
Jan 28, 1993
priority date (Note) -
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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.
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