The steel fiber inspection

1, The testing of steel fiber tensile strength: the tensile strength is required not less than 380MPA;

2, bending properties testing of steel fiber: make the steel fiber bend  90 ° on 3 mm steel bars, the steel fiber is not broken off. each batch of tested steel fiber is not less than 10;

3, impurity content, steel fiber surface without oil, can not be coated with hazardous substances or something that affects steel fiber and concrete bonding impurities.

4, the length tolerance of the steel fibers should not exceed 10%, each batch of tested steel fiber is not less than
10.

5, The passing rate of the diameter or equivalent diameter steel fibers not less than 90%, it can take the weight of law inspection, sampling 100 per batch, weighing scales, calipers measure its length, equivalent to the average obtained meet the requirements of the provisions