The inverted pavement system is a composition in which a weak layer is placed on a relatively strong stabilized base layer.  The base layer of the inverted pavement studied in this work is mostly a cement-treated layer with varied cement content depending on the unconfined compressive strength (UCS) criteria. Furthermore, in this research, the base layer of the present pavement system is designed with fly ash, aggregate, and treated with cement wherein the fly ash that has been used as the replacement of aggregate. The optimal cement content has been determined for the new aggregate blend considering strength and durability requirements of the blended mix. The pavement has been designed as per Indian specification, and a test track has been constructed for 0.5 million standard axle traffic. The performance of test section has been evaluated using Falling Weight Deflectometer (FWD) at the base level, Benkelman Beam Deflection (BBD) at surface level and Accelerated Loading Test (ALT) by actual loading through a standard axle truck traveling back and forth on the test track. The evaluation of pavement in terms of rutting and fatigue of the surface layer has been monitored to determine the performance of the pavement. The post-failure evaluation of the test track has been done using Plate Load Test (PLT), Dynamic Cone Penetration (DCP) test, and Ultrasonic Pulse Velocity (UPV) test to ascertain the distress caused.

Contributors: Khan S, Nagabhushana M N, Hossain K, Tiwari D, Vittal U K G, Bazan C.