USES material not qualified. Such as sand, stone, aggregate quality unqualified; In addition, mostly because cement volume expansion rate is too large (stability serious adverse).
所用材料不合格。如砂、石、集料质量不合格；除此之外，大多数是因为水泥体积膨胀率太大(安定性严重不良)。
The sand stratum in old river bed is important factor affecting stability of dam.
古河道砂层的存在，是影响围坝稳定的主要环境因素。
This paper researches the base made of the cement stability fine sand in materials composition designing, construction and pavement characteristic.
本文对水泥灰土稳定细砂基层结构的材料组成设计、施工工艺及路用性能进行了较为系统的研究。
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