Steel Fiber Plays An Increasingly Important Role in Highway Construction

The vehicle load and density on rural roads and national trunk roads are getting larger and larger. With the rapid development of national economic construction and highway transportation, the driving speed is getting faster and faster, and the requirements for roads are getting bigger and bigger, and steel fiber Concrete plays an important role in road construction. The main function of the randomly distributed short fibers in steel fiber concrete is to hinder the expansion of micro-cracks inside the concrete and block the occurrence and development of macro-cracks. In the early stage of loading, the cement base material and fibers jointly accept external forces. When the concrete cracks, the fibers across the cracks become the main recipients of external forces. Therefore, steel fiber concrete has a range of physical and mechanical properties compared with ordinary concrete. In addition to the fact that steel fiber concrete has no significant change in impermeability compared with ordinary concrete, steel fiber concrete has good crack resistance and integrity, so it has freeze-thaw resistance, heat resistance, abrasion resistance, cavitation resistance and corrosion resistance. sex has improved significantly. Steel fiber plays an increasingly important role in highway construction and has considerable development prospects.

Cement-based composite material composed of metal fiber reinforced materials. The short and thin steel fiber concrete is made of cement slurry, mortar or concrete as the matrix. Metal fibers with high tensile strength, high ultimate elongation, high alkali resistance and other good properties are evenly dispersed in the concrete matrix. A new type of building material. The purpose of steel fiber concrete mix proportion design is to reasonably combine the constituent materials, namely steel fiber, cement, water, coarse and fine aggregates and external admixtures, so that the prepared steel fiber concrete can meet the construction and engineering requirements to the greatest extent. The prepared steel fiber concrete has better workability, is convenient and meets construction requirements. Give full play to the characteristics of steel fiber concrete, reasonably determine the amount of steel fiber and cement, and greatly reduce project costs. Meet the compressive strength and flexural strength requirements of highway bridges and improve the durability of the bridge deck. Steel fiber concrete can better solve cracks, durability and other problems that are difficult to solve with ordinary concrete, which is beneficial to improving the quality of the bridge deck and extending the service life of the bridge deck.