Through plastic mortar strength test, it has been proved as the ideal active admixture.

再经软练胶砂强度试验，证明是理想的活性混合材料。

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The influence of curing age on concrete strength has had a ripe research, but on mortar strength not perfect.

养护龄期对混凝土强度影响的研究已十分成熟，但是养护龄期对砂浆强度的影响研究并不完善。

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A formula is provided to calculate the compressive capacity of concrete block masonry when the mortar strength is very low.

提出了适用于砂浆强度很低的灌孔砌块砌体的抗压强度计算公式。

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Neither can I spell out how Amazon mows down bricks and mortar retailers but Amazon has the balance sheet strength to go mano a mano, starting with Wal-Mart.

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From here on, the factors important to success in the traditional brick-and- mortar retail business -- pricing power based on brand strength and economies of scale -- also will be required on the Internet.

FORBES: Does Amazon.com really matter?