粉煤灰在南非筑坝中的应用南非粉煤灰南非粉煤灰是由燃烧低级的次等沥青煤而生成的，这种次烟煤的氧化钙含量（按质量），般在４～９％的范围内，所以按ＡＳＴＭ标准定“Ｆ级”粉煤灰。在南非，从经济考虑，电站是建在或靠近煤矿区，而且在完全一致的条件下运行，因而，由... Application of fly ash in South African damming South African fly ash South African fly ash is produced by burning low grade secondary bituminous coal, which has a calcium oxide content (by mass) of 4 to 9% Of the range, so according to ASTM standards set “F grade” fly ash. In South Africa, from economic considerations, power plants are built at or near coal mines and operate under exactly the same conditions and thus ...