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Strength of Concrete

Concrete Strength Testing: Tension vs. Compression

Description

Concrete strength testing compares tensile strength and compressive strength. These two properties are related, but they do not rise at the same rate. Tensile strength usually grows more slowly than compressive strength, so the balance between them changes as concrete gets stronger.

Several facto...

Transcript

混凝土的抗拉强度与抗压强度之间并非成正比关系,但两者密切相关。

抗拉强度的增长速度慢于抗压强度,并受到多种因素的影响,包括测试方法、试件尺寸、骨料表面纹理以及混凝土的含水率。

由于试样夹持困难且难以避免偏心载荷,直接拉伸试验具有较大挑战性,因此并不常见。取而代之的是,通常采用弯曲试验和劈裂抗拉试验来评估材料在间接拉伸条件下的性能。

直接拉伸试验中实验室试件尺寸较大,意味着随着体积增加,遇到薄弱点的可能性也随之上升,可能导致试件失效。

与圆形砾石相比,棱角状碎石骨料因具有更好的粘结性能而能提高混凝土的抗折强度。骨料形状对混凝土的劈裂抗拉强度和直接抗拉强度影响较小。

对于棱角状骨料,弯曲强度与抗压强度之比也更高,尤其是在...

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