Feasibility of Improving the Mechanical Properties of Concrete Pavement Using Basalt Fibers

Many research studies have so far been done to improve the mechanical properties of concrete pavement by using basalt fiber; these studies have indicated the positive effects of this fiber on concrete pavements. Accordingly, the idea of applying this fiber, which is proportional to the concrete mix design and is commonly used in this geographical area, was introduced. Therefore, based on the type and amount of basalt fiber content recommended in the technical literature, the effect of using this fiber in two conventional mix designs was evaluated. In order to determine the effect of the fiber on mechanical properties affecting pavement design, the influence of the alkaline environment of cement on the fiber was initially examined. Then, concrete samples containing this fiber are subjected to tensile, compression, and bending tests. The results showed that in the mix design commonly used in this area, the use of basalt fiber in accordance with the recommended amounts indicated in most studies may lead to a minor improvement in the toughness index and indirect tensile strength of concrete samples and to negative effects on four-point bending and compressive strength.