Rockfill Embankment Construction and Testing Methods for Airfield Pavement

Abstract: The paper focuses on construction methods for rock fill embankments of airfield pavements. It also covers control tests being employed and key parameters which needs to be monitored in Rock fill embankments for airfield pavement. The paper also discusses on Validation tests like Falling Weight Deflectometer (FWD), Multi-channel analysis of surface waves (MASW) and Zone load tests for rock fill embankments for airfield pavements in addition to Field compaction test. Control strips were constructed, and field density was evaluated using Water replacement testing method for various roller passes. Density plots vs Roller passes curves were developed for each type of fill and accordingly reference density was established. Additionally, correlation established with load tests and FWD. FWD was used for each layer as an additional testing method to ensure the consistency in compaction of the rock fill. The tests were validated through plate load and Zone load tests. Correlation of test results among various testing methods employed are briefed. Geophysical testing methods MASW test was used after stage completion of embankment to assess the homogeneity of the fill. Performance based specifications were developed for rock fill works for pavements. Instrumentation installed for monitoring the fill performance is also covered in the paper.