Caracterização química e física do CAP 50/70 modificado por adição de óleo de linhaça.

Abstract

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.