The Function of Carbon Fiber Geogrids in Improvement of Fatigue and Lowering the Tensile Strains of Flexible Pavements. A Comparison Between Experimental and Numerical Results

Most of the distress in flexible pavements is due to cracking and rutting. Propagation of cracks is divided into three modes. Mode I is opening the cracks, mode II is propagation of cracks through the overlay and mode III is breakage. Geogrids distribute the street and loads to adequate area and cause augmentation bearing capacity. This work surveys the function of carbon and glass fiber geogrids on delay of crack propagation in flexible pavements; by comparing laboratory and computer software (BISAR3.O andCIRCLY5.O) results. The research utilizes the beam fatigue test, gyratory compactor and indirect tensile test. Simulated– repeated loading with a frequency of 10 Hz simulate high speed traffic was applied to beam fatigue specimen. Evaluation of the results is work test as well as numerical calculation using the software yield comparable results and 25-40% tensile stresses can be absorbed as a result of carbon fiber Geogrids.