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Basalt Fiber Reinforced Concrete Fatigue Study

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Basalt Fiber Reinforced Concrete Fatigue Study

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Questions and Answers

Why is studying the fatigue performance of concrete materials important?

To increase the ductility of concrete

To improve the compressive strength of concrete

To enhance the tensile strength of concrete

To design anti-fatigue structures (correct)

What is the significance of the direct tensile fatigue tests conducted in this study?

To explore the effects of fiber content and stress level on the fatigue life of concrete (correct)

To analyze the compressive strength of concrete

To measure the density of basalt fibers in concrete

To investigate the elastic modulus of concrete

What is the failure mode of basalt fiber reinforced concrete under cyclic loading?

Brittle failure (correct)

Tensile failure

Shear failure

Ductile failure

How does the fatigue life of concrete change with an increase in basalt fiber content?

It first increases and then decreases (C) Signup and view all the answers

What type of tests are commonly used to study the fatigue performance of basalt fiber reinforced concrete?

Indirect tensile or compressive strength tests (C) Signup and view all the answers

How were direct tensile fatigue tests conducted in this study?

Using a self-developed concrete axial tensile device (D) Signup and view all the answers

What is the effect of stress level on the fatigue life of basalt fiber concrete?

The fatigue life decreases with the increase of stress level (C) Signup and view all the answers

What are the three stages into which the fatigue deformation process of basalt fiber reinforced concrete can be divided?

The stage of fast strain growth, the stage of uniform strain growth, and the stage of rapid strain growth (C) Signup and view all the answers

What are some of the dynamic effects on concrete structures mentioned in the text?

Repeated impacts of waves on oil extraction platforms (D) Signup and view all the answers

Why is conducting research on the fatigue performance of concrete materials considered significant?

For the anti-fatigue design of concrete structures (D) Signup and view all the answers

What is the primary reason for adding fiber materials to concrete?

To significantly improve the mechanical properties and durability of concrete (D) Signup and view all the answers

What is a characteristic property of basalt fiber according to the text?

Produced through environmentally friendly melting process of volcanic rocks (C) Signup and view all the answers

Which type of fiber reinforced concrete has been increasingly used due to its excellent mechanical properties?

Basalt fiber reinforced concrete (D) Signup and view all the answers

What has been achieved by domestic and foreign scholars in the past decade according to the text?

Relatively rich research results on the fatigue performance of fiber reinforced concrete (D) Signup and view all the answers