ANÁLISE LABORATORIAL DE MISTURAS ASFÁLTICAS ABERTAS USINADAS A QUENTE COM A UTILIZAÇÃO DE DIFERENTES LIGANTES

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This research Project was conceived with the objective of comparing the performance of three open graded asphalt mixes, all three with the same aggregate gradation for all dosages, on which three different asphaltic binders were used; one conventional binder, one with the addition of co-polymers SBS and another one modified by the addition of ground rubber from old used tires. The molded mix samples were submitted to Marshall test method, resilient modulus determination, determination of indirect tensile strength, permanent deformation (static creep), permeability under constant load and Cantabro test method which allowed the evaluation of the mixes performance regarding structural capacity, permanent deformation, permeability and resistance to raveling. The test results showed that asphalt rubber binder demanded a greater binder content than all the other mixes. The greater Marshall stability values, resilient modulus values and indirect tensile strength values were achieved with CAP 50/70. All mixes presented Cantabro abrasion values greater than the recommended limits for some open graded mixes, as well as low permeability, which makes the mixes prone to only reasonable drainage capacity in case the compacted layer in the field holds the same characteristics as those verified in the laboratory.

ASSUNTO(S)

ligantes convencionais copolímeros sbs conventional asphalt binders, co-polymers sbs, modified asphalt binders with ground old tires ligantes modificados por bmp geotecnica

ACESSO AO ARTIGO

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