The test results indicated that the strength of concrete could be estimated by supersonic velocity values.

结果表明由超声波测试得到的声速值可以方便地估算出混凝土的强度。

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Used in production, it will decrease the cost, improve the strength of concrete and the capacity of mixer.

该工艺的应用可降低生产成本，提高混凝土的强度和生产率。

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The special structure of zeolite increase the strength of concrete with a large amount of zeolite after one year.

沸石的独特结构使大掺量沸石粉的混凝土强度增幅较大。

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Another study, published back in 1995, showed that although the compressive strength of concrete was enhanced only slightly by the addition of polymer fibres, its impact resistance improved sevenfold.

ECONOMIST: Bunker-busting

And even though steel and concrete are still the most cost-effective materials, new combinations of these substances provide greater strength and fire retardance, says W. Gene Corley, senior vice president at Construction Technology Laboratories in Skokie, Ill.

FORBES: They Will Rise Again