How to detect steel fibers

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

2, the bending properties of steel fiber demolition, steel fiber diameter of 3 mm steel bars should be able to withstand the demolition of 90 ° bend constantly test each batch of not less than 10;

3, impurity content, steel fiber surface may not have oil, not coated with hazardous substances or influence of steel fiber concrete bonding with impurities.

4, the length of the steel fibers should not exceed 10% of the standard deviation of the length of the random sample of at least 10 or more per batch;

5, the diameter or equivalent diameter steel fibers passing rate not less than 90%, can take the weight of law examination, sampling 100 per batch, weighing scales, calipers measuring its length, asking to meet the requirements equivalent averages ;