Abstract
Asphalt concrete due to both of its high technological and service properties is a choice one material for road pavement construction. As asphalt concrete contains bitumen as a binding material it becomes vulnerable to the destructive effect of the fuels and lubricants. This disadvantage is very critical in places like airports, parking lots and car service centers. Polymer modified asphalt (PMA) concrete is considered to be more resistant to fuel than the traditional asphalt concrete. In this study, changes in fuel resistance index were investigated for asphalt concrete and PMA concrete samples under simultaneous action of bending force and diesel fuel. The influence of bituminous binders consistency and technology of modification of bitumen by SBS polymer on fuel resistance of asphalt concrete and PMA concrete were analyzed. Our research has found that bitumen modified with direct introduction of SBS polymer has a much higher fuel resistance than pure bitumen of similar consistency. On the other hand, modification of bitumen by mixing it with polymer-oil solution results in a significant drop of PMA concrete fuel resistance.
Highlights
In spite of its high technological and service properties asphalt concrete has one essential drawback, in particular it is susceptible to the dissolution when exposed to the action of fuels and lubricants
The goal-seeking development of asphalt concretes that have an increased resistance to the action of fuels and lubricants can only be efficient in case of the availability of objective criteria used for the estimation of their fuel resistance
Taking into account the fact that the fuel resistance of asphalts and polymer modified asphalts (PMA) depends mainly on the solubility of binding agents included in their composition we developed the method used for the estimation of the solubility rate of bitumen binders in fuel media
Summary
In spite of its high technological and service properties asphalt concrete (hereinafter referred to as asphalt) has one essential drawback, in particular it is susceptible to the dissolution when exposed to the action of fuels and lubricants. The goal-seeking development of asphalt concretes that have an increased resistance to the action of fuels and lubricants can only be efficient in case of the availability of objective criteria used for the estimation of their fuel resistance. In this connection the problem of the studies of destruction processes that occur in asphalts and polymer modified asphalts (PMA) exposed to fuel environments is rather topical
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