Laboratory Evaluation of the Effect of Crushed Basalt Fiber on the Performance of Porous Asphalt Mixture

Author
Sara Choubdar
Department of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
10.22034/road.2024.197620
Abstract
Porous asphalt mixture is a type of asphalt mixture with good drainage. However, it has poor tensile performance and durability. Crushed basalt fibers (CBF) have been proven to be an effective additive to improve the mechanical performance and fatigue of asphalt mixtures, but little attention has been paid to porous asphalt mixtures. In this research, the effect of crushed basalt fibers with different lengths (non-fibers, 3 mm, 6 mm, 9 mm and 12 mm) and contents (3% and 4%) on the performance of porous asphalt mixture is investigated. A series of tests were performed to determine the optimal fiber length and percentage, including the shedding test, the canta abrasion test, the freeze-thaw split tensile test, the wheel groove test, the low temperature cracking resistance test, and the four-point bending beam test. After that, indirect tensile tests were conducted at different temperatures to investigate the tensile strength properties of porous asphalt mixtures with optimal fiber length and percentage. The results show that the addition of crushed basalt fibers can generally improve the performance of the porous asphalt mixture because the crushed basalt fibers form a three-dimensional network structure in the porous asphalt mixture.
Keywords
Fiber
Basalt
Tensile Strength
Fatigue
Cantabro
Porous Asphalt
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