A.25% B.30% C.35% D.40%
A.最大水膠比0.60,最小膠凝材料用量280kg/m3 B.最大水膠比0.60,最小膠凝材料用量260kg/m3 C.最大水膠比0.55,最小膠凝材料用量300kg/m3 D.最大水膠比0.55,最小膠凝材料用量280kg/m3
A.≥80% B.≥84% C.≥88% D.≥90%