Why do we need to use steel fibers in concrete?

In underground waterproofing projects, when steel fiber waterproof concrete (reinforcement) is used for waterproofing with outer cover, the total chloride content in the mixture shall not exceed 1% of the cement content; when steel fiber waterproof concrete is used for waterproofing without outer cover, and without In a chloride ion environment, the total chloride content in the mixture shall not exceed 0.3% of the cement content; when steel fiber waterproof concrete is used for waterproofing without external packaging and in a chloride ion environment, the total chloride content in the mixture shall not exceed the cement content. 0.1%. Incorporating a certain amount of randomly distributed steel fibers into concrete can effectively increase the tensile strength of concrete, thereby improving the cracking and seepage resistance of concrete.