單項(xiàng)選擇題混凝土細(xì)骨料中氯離子含量,對(duì)鋼筋混凝土按干砂的質(zhì)量百率計(jì)算不得大于(),對(duì)預(yù)應(yīng)力混凝土,按干砂的質(zhì)量百分率計(jì)算不得大于()。

A.0.06%,0.02%
B.0.6%,0.2%
C.0.06%,0.04%
D.0.6%,0.4%


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