The influence of different superplasticizers on drying shrinkage of mortar with the same water cement ratio and same sand cement ratio was investigated in this article.

通过试验研究了几种类型的高效减水剂在同样水灰比和砂灰比的情况下对砂浆干燥收缩性能的影响。

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Mortar is composed of lime, sand and water.

灰浆由石灰、沙和水组成。

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Masonry walls are built with stones or bricks, cohered through the use of mortar, first composed of lime and sand.

首先由石灰和沙子和成的砂浆把石头和砖粘合在一起建成了砖瓦墙。

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He remembered the sand shaking under his feet from mortar fire and the dead bodies rolling in the surf, against his legs.

ECONOMIST: Bill Millin

As the sand was pumped on to an Oceanside beach, however, the navy was embarrassed: it found two 81mm mortar rounds and some machinegun bullets in the dredged sand.

ECONOMIST: California��s beaches