A.采用高Mg0含量(3.5%~5.0%)的水泥 B.適當(dāng)引氣 C.采用線膨脹系數(shù)低的骨料 D.采用礦渣粉等量替代粉煤灰
A.1/5 B.2/5 C.1/3 D.1/2
A.≥250% B.≥300% C.≥350% D.≥400%