Investigating the healing capability of asphalt modified with nano-zycotherm and Forta fibers

Abstract

Self-healing, is related to the repair of cracks caused by loading. It can be considered a reversible fatigue phenomenon. This phenomenon depends on various factors, such as temperature, rest time, crack width and the features of bitumen and asphalt, and is activated by rising temperatures. Self-healing is investigated in two areas of rejuvenators and accelerated heating. Temperature effects on self-healing is seeking the best and most economical means of creating heat in asphalt. Such methods involve heating through electromagnetic waves and microwaves. Microwave waves increase the internal temperature of the asphalt in a short time that help self-healing process. There are various methods to assess the quality and quantity of self-healing, such as fatigue-based tests, rupture tests, and non-destructive tests. In this research, the healing ability of asphalt modified with Forta fibers and Nano-zycotherm, and non-additive asphalt is investigated through rupture-based experiments, three-point bending tests. The samples were repaired by heating with microwave radiation for 24-hour period, then determined the degree of healing. According to the experiment results, the asphalt comprising zycotherm and Forta fibers additives exhibited the highest initial resistance compared. Keywords: Self-healing, Nano materials, Fiber, Hot mixed asphalt, Flexural strength