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论述了二灰砂的强度随龄期的增长而变化的规律，后期强度与早期强度的相对关系，以及压实程度、石灰质量等因素对后期强度的影响。
The law of the change of limestone sand with age is discussed. The relative relationship between the late strength and the early strength, and the influence of the degree of compaction, the lime quality on the later strength are discussed.