问题
单项选择题
下列关于无粘结预应力筋技术要求，说法错误的是（）。
A.预应力筋外包层材料，应采用聚乙烯或聚氯乙烯
B.预应力筋涂料层应采用专用防腐油脂
C.张拉段无粘结预应力筋长一般不超过50m，且锚固肋数量为双数，否则应进行分段张拉和锚固
D.必须采用Ⅰ类锚具，锚具规格应根据无粘结预应力筋的品种、张拉吨位以及工程使用情况选用
答案
参考答案：A
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下列关于无粘结预应力筋技术要求，说法错误的是（）。
A.预应力筋外包层材料，应采用聚乙烯或聚氯乙烯
B.预应力筋涂料层应采用专用防腐油脂
C.张拉段无粘结预应力筋长一般不超过50m，且锚固肋数量为双数，否则应进行分段张拉和锚固
D.必须采用Ⅰ类锚具，锚具规格应根据无粘结预应力筋的品种、张拉吨位以及工程使用情况选用
参考答案：A
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