The possibility of using maleic anhydride as a foaming agent to produce foamed bitumen was investigated. The optimal content of maleic anhydride was determined according to the indicators of the growth of the binder volume and the half-life of the foam. With use of maleic anhydride as a foaming agent, foamed bitumen was obtained, and later was used to obtain two samples of stone mastic asphalt, which differed in mixing and compaction temperatures of stone mastic asphalt mix. For comparison, the composition of stone mastic asphalt mix was designed using non-foamed (BND 70/100 and BND 70/100 modified with maleic anhydride) and foamed bitumen (BND 70/100 foamed with maleic anhydride at two different temperatures). Stone mastic asphalt specimens were formed and tested
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