Cement additives are used to change the cement's density, setting time, compressive strength, flow properties and dehydration rate, to cause the cement to expand, and to reduce the cost of the cement.

水泥添加剂用来改变水泥的密度、凝固时间、抗压强度、流动性能和脱水率，并用来使水泥膨胀以及降低水泥成本。

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The change of strength with loading rate is primarily due to the variation of cohesion with loading rate.

且强度变化主要是由于粘聚力随加载速率变化引起的。

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It shows that after adding 20% low profile additive to the UP resin, the shrinkage rate of cured resin is 2.1%, the retention rate of bending strength is 88% and no change in flexural modulus.

结果表明，在不饱和聚酯树脂中加入2 0 %的该类低收缩添加剂，树脂的固化收缩率为2 1% ， 弯曲强度保有率为88% ，弯由模量没有明显变化；

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"We would not expect, given the strength of the flows, that intervention would materially change the level of the exchange rate, but we could take potentially the tops off rallies, " said Graeme Wheeler, governor of The Reserve Bank of New Zealand.

WSJ: Asian Governments Take Measures to Battle Strong Currencies