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【单选题】
水泥凝结时间的影响因素很多,以下哪种说法不对?A.
水灰比愈小，凝结时温度愈高，凝结愈慢
B.
熟料中铝酸三钙含量高，石膏掺量不足使水泥快凝
C.
水泥的细度愈细，水化作用愈快
D.
混合材料掺量大，水泥过粗等都使水泥凝结缓慢
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A.
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B.
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C.
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D.
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