Resistance of Asphalt Grid Reinforcement Against Crack Propagation of 4-Point Bending Beams Using Imaging Technique

Asphalt pavement materials are susceptible to cracking when exposed to the traffic and environmental conditions. The crack in asphalt pavement is therefore considered as one of the main type of distresses. The use of reinforcement grids is one of the possible solutions against crack propagation. An analysis of crack propagation of asphalt mixtures reinforced with grid interface in comparison with unreinforced specimens has been performed using a 4-point bending beam test setup at low temperature. The image analysis method was used to analysis the number of cycles required to reach the specimen failure against cyclic loading. The 4-point bending beam crack propagation test was found an interesting approach to identify the low-temperature performance of the reinforced asphalt composite layer system. The results showed that the specimen with a reinforced grid interface has higher resistance against the crack propagation compared to specimens without reinforcement.