ARAUJO, L. A. W.; http://lattes.cnpq.br/1032375391004910; ARAUJO, Lucas de Assis Wanderley.
Resumo:
The processes that involves the manufacture of asphalt mixtures are connected to
procedures which uses high temperatures in its conception, the effort to decrease
those temperatures affords gains in sustainable issues in a short, medium and long
term. The use of non-conventional additives is not seen as innovation nowadays,
however, the natural material of oilseed origin (soy, sunflower seeds, linseed, castor
bean and palm) are showing elevate potential as modifiers material to reduce the
compacting and mixing temperature (TCU) when merged with the petroleum asphalt
cement (PAC) which compose the asphalt mixtures. The linseed is a linen derived
material which the seed is used as linseed’s oil raw material, has already shown good
qualities in other researches, mainly for presenting antioxidant properties. This
dissertation had as its objective evaluation of the linseed’s oil add effect on the
conventional petroleum asphalt cement’s (PAC 50/70) chemical and physical
properties, considering the oil addition percentile of 1%, 2%, 3%, 4%, 5% and 6%. The
research also proposed the review of the modified binders when submitted to short
term ageing (RTFO). The results showed that the oil tends to behave as a helpful
material against the asphalt’s oxidation, assists the compacting ang machining
temperature diminish and therefore becomes a practical and sustainable subject.
However, other physical properties have not attended the expectancies related to the
requirements preconized, showing that the linseed’s oil addition to the PAC only have
limited functionality.