底基层用粉煤灰中SiOAl和Fe203的总含量应大于70%,粉煤灰的烧失量应不大于(),粉煤灰比面积应大于2500m2/g。A、20%B、25%C、30%D、35%
底基层用粉煤灰中SiOAl和Fe203的总含量应大于70%,粉煤灰的烧失量应不大于(),粉煤灰比面积应大于2500m2/g。
- A、20%
- B、25%
- C、30%
- D、35%
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