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)。
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).
它作为水泥混合材料可以改善水泥的安定性，并能降低水泥的成本。
Used as cement admixture it can improve the soundness of cement and reduce the cost.
石灰石中经常含有少量的氧化镁，这对水泥的安定性有害。
Limestone often contains small amount of magnesium oxide that is harmful to soundness of cement.
水泥的强度低，安定性不合格，主要是配料不当的原因造成的。
The strength of the cement is low, the stability of volume is unqualified, primarily is to go together with raw materials mix proportion by weight what caused by inappropriate reasons .
研究了当水泥中混入隔热防水粉后 ，隔热防水粉对水泥标准稠度用水量、凝结时间及体积安定性的影响 。
The effect of the amount of water needed under the cements normal consistency, setting time and volume stability were investigated when heat insulation and waterproofing powder was added in cement.
讨论了水泥安定性对混凝土强度的影响以及混凝土中水泥安定性的简易检验。
The influence of cement soundness on concrete strength and the method of simple test for soundness of cement in concrete have been discussed.
水泥抗压强度随钢渣掺量的增加而有所降低，水泥安定性合格。
The compressive strength of cement is somewhat reduced with the increase of the slag quantity mixed, however, the soundness remains qualified.
本标准规定了水泥标准稠度用水量、凝结时间和由游离氧化钙造成的体积安定性的检验方法。
This standard specified the testing methods of water requirement of normal consistency, setting time as well as soundness of portland cements caused by free calcium oxide.
本标准规定了水泥标准稠度用水量、凝结时间和由游离氧化钙造成的体积安定性的检验方法。
This standard specified the testing methods of water requirement of normal consistency, setting time as well as soundness of portland cements caused by free calcium oxide.
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