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Cerâmica

versão impressa ISSN 0366-6913

Resumo

SILVA, C. L. da; SILVA, A. C. L. da  e  FROTA, C. A. da. Dynamic modulus of asphalt mix with sintered calcined clay aggregate. Cerâmica [online]. 2014, vol.60, n.353, pp.10-21. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132014000100003.

The present study has as main objective the determination of uniaxial dynamic module, allowing obtaining viscoelastic properties able to simulate a more realistic condition that occurs in pavements, under the traffic demand. This is an original research, with the participation of the sintered calcined clay aggregate (SCCA) in asphalt mix, in order to promote feasible option for paving urban roads in the city of Manaus. We used also the following materials: river bed pebbles, substitute, given the lack of regional stone material (reference), two natural sands, plus artificial sand from the crushing plant calcined clay and asphalt cement 50/70 sold in the state of Amazonas. For mineral composition of the mixtures, we used the Bailey method, to emphasize the interlocking of their stony skeleton in order to ensure greater resistance to permanent deformation, primary pathology presented by local pavements. The results revealed that, at high temperatures and low frequencies, mixtures with SCCA were more rigid than those mixed with pebble, indicating less susceptibility to permanent deformation, while at low temperatures and at high frequencies, the process is reversed and composites with added alluvial began to expose dynamic modulus values higher than those of mixtures with alternative material. The mechanical evaluation by means of the Lottman assay, showed that both composites (with pebble and SCCA) techniques, although with slight loss of resistance, preserved their structures, due to the effect of moisture induced. The insertion of artificial sand in asphalt mix, beyond satisfactory on the mechanical performance, minimizes natural resource extraction.

Palavras-chave : dynamic module; viscoelasticity; Lottman; sintered calcined clay aggregate.

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