Steel Fiber Detection

1, the tensile strength of steel fiber inspection required tensile strength not less than 380MPa;

2, demolition bending properties of steel fibers, steel fibers should be able to withstand a diameter of 3 mm steel rod bent demolished 90 ° constantly test each batch of not less than 10;

3, impurity content, steel fiber surface without oil, can not be coated with a substance or harmful influence of steel fiber and concrete bonding impurities.

4, the length of the steel fibers should not exceed 10** of the standard deviation of the length of at least 10 or more randomly selected per batch;

5, the diameter or equivalent diameter steel fiber passing rate of not less than 90** by weight can be taken to test method, sampling each batch of 100, weighing scales, calipers measured the length required to obtain an equivalent average value satisfies a predetermined ;

Inspection of raw materials:

Quality control standards must meet the above raw materials, should be tested in accordance with the construction of highway engineering technical specifications.

Steel fiber reinforced concrete inspection:

Should focus on testing the workability of steel fiber reinforced concrete, slump and water-cement ratio, etc., and must live in a visual inspection of steel fiber concrete distribution,

It found that steel fiber clumping phenomenon should be extended mixing time.