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The problem with use of flyash in the West is mostly legislative. The problem is that there are no two similar sources of flyash, as there are no chemically id
by baybal2 5y ago
The problem with use of flyash in the West is mostly legislative.
The problem is that there are no two similar sources of flyash, as there are no chemically identical sources of coal from which it came from.
Current code only lets a very narrow selection of flyash to be blended into OPC, despite most of it being suitable, and not influencing the resulting characteristics.
For the geopolymers, the issue of natural variability is even worse.
- kwhitefoot 5y agoAnother problem with fly ash in Europe is that a number of countries have no coal fired power stations to produce it or are closing down what they do have. So it is a declining resource anyway.
- baybal2 5y agoAs written in the article, the amount already there will last humanity at least a century.