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How to Identify High-Quality Steel Fiber?

Mar. 23, 2021

As a Steel Fiber Reinforced Concrete Supplier, share it with you.

First look at its shape qualification rate. The shape of the special-shaped steel fiber conforms to the factory regulations. The percentage of the total fiber is called the shape qualification rate. For steel fibers of other shapes except straight steel fibers, the shape qualification rate should not be less than 90%. 100 pieces of each batch of products are randomly sampled, and the shape of the steel fiber is checked one by one. If there are broken hooks, unilateral forming and other shape defects, it is regarded as unqualified, and the shape pass rate of the inspected steel fiber should not be less than 85%.

Glued Hooked End Steel Fiber

Glued Hooked End Steel Fiber

diameter or equivalent diameter, the deviation of the average value of the steel fiber diameter or equivalent diameter from its nominal value should not exceed +-10%. For the inspection of the diameter of the steel fiber of the circular cross-section, 10 pieces are randomly sampled in each batch, and the diameter is measured one by one with a vernier caliper (measurement unit mm, with an accuracy of 0.02mm), and the deviation of the average value of the obtained diameter from its nominal value shall be determined. Meet the requirements of the specified deviation. For the inspection of the equivalent diameter of the steel fiber of the non-circular section, the average equivalent diameter is determined by the quality method, and 100 steel fibers are randomly sampled in each batch, and the quality is measured with a balance with an accuracy of 0.01g. The vernier caliper with an accuracy of 0.02mm measures the length of the steel fiber one by one, and the deviation of the average equivalent diameter d(f) obtained by formula (1) from its nominal value should meet the requirements of the specified deviation.

The deviation of the length of the steel fiber from its nominal value should not exceed +-10. The inspection method randomly sampled 10 pieces from each batch of products, and measured the length with a caliper with an accuracy of not less than 0.02mm. The length deviation qualification rate should not be less than 90 %, the average value of the length of 10 fibers should meet the deviation requirements at the same time.

The influence of steel fiber on the performance of floor concrete

Through the introduction of steel fibers of different types and dosages, the study focuses on the law and mechanism of their influence on the working performance, mechanical properties, bending toughness and impact resistance of C25 floor concrete. The test results show that: different types of steel fibers have different effects on the working performance of floor steel fiber concrete. Under the same type of steel fiber, the working performance of floor steel fiber concrete decreases with the increase of the content; relatively no steel fiber is added to the floor Concrete, the compressive strength of floor steel fiber concrete is slightly reduced after adding steel fiber, but the flexural strength can be increased by more than 50%, and the bending toughness and impact resistance can also be significantly improved; The flexural strength, flexural toughness and impact resistance of fiber concrete are not affected. Through comprehensive analysis of experimental results, CW07 steel fiber is selected for C25 floor steel fiber concrete steel fiber, and the dosage is 20 kg/m3~30 kg/m3.

Our company also has Glued Hooked End Steel Fiber on sale, welcome to contact us.


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