A.減少用水量 B.延長(zhǎng)攪拌時(shí)間 C.保持沙率不變,增加砂石用量 D.保持沙率不變,增加骨料用量
A.小于7% B.小于5% C.小于3% D.小于1%
A.0.15~3.25mm B.0.15~3.75mm C.0.15~4.25mm D.0.15~4.75mm