A. 自由膨胀率，侧向约束膨胀率及膨胀力试验试件数量均不得少于3
B. 自由膨胀率浸水后试验时间不得小于48h
C. 侧向约束膨胀试验时，试样顶部应保持5kPa的持续压力
D. 进行膨胀压力试验时，首先施加5kPa的压力，然后再缓慢注水
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