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Steel Reinforcement Tension Test

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  • Essay length: 3012 words
  • Submitted: 30/11/2008
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University Degree Engineering

The first 200 words of this essay...

Introduction:

Steel Reinforcement Tension Test can be conducted in two experiment session:

* Two deformed grade 460 high yield steel bars

* Two plain round grade 250 mild steel bars

Both steel bars conform to the relevant requirements of BS 4449:1988; have a nominal diameter of 20 mm, and a length of approximately 800 mm.

Objectives:

* Practice tension testing of steel bars as reinforcement for concrete according to Hong Kong current standards.

* Determine geometrical and mechanical properties of steel reinforcements including nominal cross-sectional area, yield stress, tensile strength, nominal stress at fracture, and elongation over gauge length, reduction of cross-sectional area at necking section, and modulus of elasticity.

* Check compliancy of the determined properties of the steel reinforcements with relevant Hong Kong standards.

Apparatus:

1. Testing machine equipped with an extensometer with a plotter for drawing load-extension curve (fig. 1)

Fig. 1

2. straight edge (fig. 2)

Fig. 2

3. A caliper (fig. 3)

Fig. 3

4. A metal saw for making marks on the specimens (fig. 4)

Fig. 4

5.

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