降低砂石中针片状含量,可使混凝土的
A.流动性、强度与耐久性提高,干缩与徐变增大
B.流动性、强度与耐久性提高,干缩与徐变降低
C.流动性强度提高,耐久性、干缩与徐变降低
D.流动性、干缩与徐变降低,强度与耐久性提高
正确答案是B
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