Abstract
Reinforcement interlayer reduces the development of cracks in the asphalt overlay by absorbing the stresses induced by heavy traffic or underlying cracking in the early-constructed pavement. This research is dedicated to studying the behavior of pavement layers on a sand subgrade under simulated effect of earthquake. In this study, the sand layer has a thickness of 600 mm and the base course is taken as 300 mm. The asphalt layer was prepared as a panel with dimensions of 300 × 300 × 50, which represents the surface layer. These layers are experimentally tested under the influence of earthquake loading with different frequencies 0.5, 1, 1.5 Hz. The tests consist of two parts without adding the geogrid, with geogrid in the center of the base layer and between the base layer and sand layer. Loaded stresses in the three layers are monitored using stress gauge sensors, while displacements of the asphalt layer by using displacement gauge sensor. Obtained results considered models reinforced with geogrid, the stress recorded is higher than in unreinforced models but the displacement decreases by increasing the geogrid in the layers at three frequencies. When the geogrid is laid between the base course and sand layer, the stress in the sand subgrade layer is less than that in the base and asphalt layers.
Highlights
Composite material is basically a reinforced ground layer
The results showed that unreinforced working platforms having the same thickness the working platforms reinforced with geosynthetics have smaller flexible deflections and larger flexible moduli
The thickness of the selected layer depends on several pieces of research related to this study; the thickness of subgrade is chosen based on the work of [14], [15], and [16] which is 600 mm, and the thickness of the base layer is 300 mm and the asphalt layer is 50 mm
Summary
Composite material is basically a reinforced ground layer. These materials comprise ground base that is reinforced by layers of sheets or strips made of specific material capable to bear large tensile stress. Visual inspection of the pavement results showed that the control part was found to develop longitudinal cracks in with very short while falling weight deflectometer (FWD) testing was conducted to try to quantify the pavement performance period as where the two geo-grid reinforced sections were found to perform well, without any proof of longitudinal cracking. For geogrid reinforced stretch followed by bitumen coated bamboo mesh and waste plastics reinforced stretch in the flexible pavement laid on expansive subgrades, it was observed that the maximum load-carrying ability related with less value of rebound deflection is acquired. Sensors (e.g., Smart-Rock and acceleration sensors) were utilized to gauge the dynamic response of asphalt pavement and vibrating drum through vibrating compaction and a field test program is designed. The study will discuss the influence of earthquake load on stress transfer in the pavement layers and the effect of frequency of earthquake load on the induced displacements and stresses between flexible pavement layers reinforced with geogrids
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
