The addition of mineral admixtures is one of the effective approaches, which can improve fracture brittleness of high compressive strength concrete.

通过试验得出复掺矿物掺合料是改善混凝土断裂脆性的有效途径之一。

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Confinement of concrete results in a modification of the effective stress-strain relationship: higher strength and higher critical strains are achieved.

混凝土约束改变了有效应力-应变关系：造成强度和临界应变的增加。

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So the high effective pre-stressed reinforced concrete hollow slab with Medium strength spiral-continuous -ribs steel bar has a good prospect.

因此，以中强螺旋肋钢丝为受力筋的预应力空心板具有广阔美好的发展前景。

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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.

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