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Infraestructura Vial

versão On-line ISSN 2215-3705

Resumo

PEREZ GARCIA, Natalia et al. Compaction and mechanical properties of soils compacted in the gyratory compactor. Infraestructura Vial [online]. 2016, vol.18, n.31, pp. 20-29. ISSN 2215-3705.

The authors present a series of compaction curves obtained in fine-grained soils through use of a gyratory compactor. The effect on compaction curves of variables such as vertical pressure, angle of gyration, and speed of gyration is shown. The curves obtained with the gyratory compactor were compared with those obtained using traditional methods of compaction (Proctor standard and modified compaction). It was observed that the standard compaction curve can be obtained with 200 gyrations, 1.25 degrees of angle of gyration, and a vertical pressure of 200 kPa. On the other hand, with the combination of variables studied in this research, modified compaction curves could not be reached. Tests were also performed to measure resilient modulus and unconfined compression strength on specimens prepared at optimum compaction conditions, 2% below the optimum and 2% above the optimum (for Proctor standard tests) using two methodsofcompaction.The results indicate that unconfined compression strengths and resilient modulus are related to the compaction method when samples are compacted at water content below optimum.

Palavras-chave : compaction characteristics; pavement design; gyratory compactor; resilient modulus; unconfined compression.

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