A 160 m (525 ft) high asphalt concrete core rockfill dam is currently under development in Cetin, Turkey. The dam site is in an area with topographical restrictions, space limitation and seismic hazard, which required clear understanding of the compacted rockfill properties, such as particle size distribution, density, permeability and strength parameters. Field rolling trials and laboratory testing have been carried out to investigate rock material from a Gneiss/Schist quarry. The geological settings of the quarry is complex, including weathered rock, foliation planes, and sheared/crushed zones due to tectonic impact. The main purpose with the investigations has been to verify the suitability of this quarry material to meet requirements imposed by the dam design. This paper describes the field rolling trials methodology and results together with lessons learned and rationalizations throughout the tests, which hopefully can be of guidance and serve as a practical example and useful information for future field rolling trials.
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