Where permanent formwork is incorporated in the structure extra care is required, as fullcompaction of the concrete cannot be checked after the formwork is removed.
当使用永久模板时，应特别小心，因为移掉模板后，不能够检查出混凝土是否完全压实。
2
PRINCIPLE This Method describes the procedure for determining the time required for a sample of fresh concrete to achieve fullcompaction when subjected to a standardized vibratory action.
原则本《方法》确定了在标准振荡作用下，混凝土拌合物样本要达到完全压实状态所需时间的测定程序。
3
For a dynamic compaction test on a collapsible loess site, the medium sinkage was obtained by statistics of main ramming, interval ramming and full ramming.