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- W222780030 abstract "A laboratory investigation was undertaken into the effects of commercial modifiers on the physical properties of Montana asphalts. The purpose of the study was to select modifiers to combat the severe rutting problems of the highways of Montana. There are four different sources of asphalt in Montana: Cenex, Conoco, Exxon, and Montana Refining. These refineries use different crude sources and different refining processes. The 120/150 penetration grade of asphalt from each of the four refineries was treated with six different commercial modifiers. The modifiers were polyethylene (PE), two types of thermoplastic block copolymer (SBS), carbon black (CB), ethylene vinylacetate (EVA), and styrene-butadiene rubber latex. Some modifiers were more compatible with a particular source of asphalt than others. The tests were limited to the conventional physical tests. The results showed that the modifiers reduced temperature susceptibility of all four Montana asphalts, but to varying degrees. A subjective weighting system, based on a composite performance model, was used to evaluate the effect of the modifiers on the physical properties of the asphalts. The effect of the modifier on the asphalt depended on the source of asphalt. SBS, CB, EVA, and PE weighted well with different asphalts in the weighting system, indicating changes in the physical properties that are thought to be related to rutting. SBS and EVA were selected for further laboratory testing and an experimental overlay project on a Montana Interstate highway." @default.
- W222780030 created "2016-06-24" @default.
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- W222780030 date "1993-01-01" @default.
- W222780030 modified "2023-09-24" @default.
- W222780030 title "ASSESSING EFFECTS OF COMMERCIAL MODIFIERS ON MONTANA ASPHALTS BY CONVENTIONAL TESTING METHODS" @default.
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