7.10 : العلاقة بين قوة الشد وقوة الضغط للخرسانة

The relationship between concrete's tensile and compressive strengths is not directly proportional but closely related.

Tensile strength grows slower than compressive strength and is influenced by several factors, including testing methods, the specimen's dimensions, aggregate texture, and the concrete's moisture content.

Direct tension tests are challenging due to issues with gripping the specimen and avoiding eccentric loads, making them uncommon. Instead, flexure tests and splitting tensile tests check performance under indirect tension.

The larger size of laboratory specimens for direct tension means that as the volume increases, the likelihood of encountering a weak point also rises, potentially leading to failure.

Angular crushed aggregate enhances flexural strength compared to rounded gravel due to better bonding. Aggregate shape has little effect on concrete's split and direct tensile strength.

The flexural-to-compressive strength ratio is also higher for angular aggregates, especially at greater compressive strengths.

Concrete moisture impacts the concrete strength; comparatively, wet-cured and dry-stored concrete has higher compressive strength than continuously wet-stored concrete.

While the relationship between its bending and compressive strengths is also affected, the splitting and direct tensile strengths remain consistent.