素桩成孔及浇筑过程中质量控制关键点说法错误的有（）

素桩成孔及浇筑过程中质量控制关键点说法错误的有 A. 初凝时间不应小于45h B. 混凝土灌注至设计桩顶标高以上0.80m C. 终孔后需报监理组织终孔验收 D. 软切割时需使用超缓凝混凝土 E. 硬切割时素桩宜选用普通商品混凝土 答案: AB Explanation: The correct statements are C, D, and E. C: After the completion of the hole, it is necessary to report to the supervision organization for final hole acceptance. D: Soft cutting requires the use of super slow-setting concrete. E: For hard cutting, ordinary commercial concrete is suitable for the cast-in-place pile. The incorrect statements are A and B: A: The initial setting time of concrete should not be less than 45 hours, which is an incorrect statement. B: The concrete should be poured to a height of 0.80m above the design pile top level, which is also incorrect.