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Posted on: Thursday, February 04, 2010 4:29 AM
Author: Scribd Feed
Subject: Fly Ash Report
| *ž Fly ash closely resembles volcanic ashes used in production of the earliest known hydraulic cements about 2,300 years ago. Those cements were made near the small Italian town of Pozzuoli - which later gave its name to the term "pozzolan." ž A pozzolan is a siliceous or siliceous / aluminous material that, when mixed with lime and water, forms a cementitious compound. Fly ash is the best known, and one of the most commonly used, pozzolans in the world. ž Fly ash is a fine, glass powder recovered from the gases of burning coal during the production of electricity. These micron-sized ear |
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