Preparation And Property Of Reactivity SBS Modified Asphalt

The SBS modified asphalt is widespread applied in the road construction and the bridge paving because of its good performance, but in recent years, along with the volume of traffic increases rapidly, the vehicle capacity increases, the application of superior single tire, the universal vehicles overload phenomenon as well as the climate is changeable and so on, these caused the existing SBS modified asphalt not to be able to satisfy well in the road and the bridge construction operation requirements, appeared the phenomenon of road wheel rut, bridge floor slipping and so on. On the foundation of existing SBS modified asphalt, this article prepared the reactivity SBS modified asphalt through the chemical reactive assistants carrying on the chemistry modified system to the datum SBS modified asphalt, investigated the influence of the chemical reactive assistants to the adhesive property and rheological property of datum SBS modified asphalt, the chief conclusions are as follows:1, The adding of reactive assistants had very good improvement function to the adhesive property of the SBS modified asphalt. When the using amount of reactive assistants A was 1%, the shearing intensity of the SBS modified asphalt to the steel plate enhanced 77%, the adhesive intensity increased 51%, when the using amount of reactive assistants B was 1%, the shearing intensity of the SBS modified asphalt to the steel plate enhanced 1.2 times, the adhesive intensity increased 84%, after RTFOT, the shearing intensity and adhesive intensity of the SBS modified asphalt add-on reactive assistants A was 1.16 MPa and 1.51 MPa, after RTFOT, the shearing intensity and adhesive intensity of the SBS modified asphalt add-on reactive assistants B was 1.36 MPa and 1.69 MPa.2, The reactive assistants can improved the rheological property of the SBS modified asphalt, enhanced the anti-wheel rut ability of the asphalt, Two kinds of reactive assistants all increased the storage ability module quantity G and the wastage module quantity G of the SBS modified asphalt obviously, the phasic angle 8 reduced gradually, the track gene G*/sin8 increased gradually, the stiff-spring property of modified asphalt improved obviously, under the same using amount of the reactive assistants, the 8 of the SBS modified asphalt add-on reactive assistants B were all smaller than the SBS modified asphalt add-on reactive assistants A, the G*/sin8 of the SBS modified asphalt add-on reactive assistants B were all bigger than the SBS modified asphalt add-on reactive assistants A. The modified effect of reactive assistants B was better than reactive assistants A.3 , The adhesive property and rheological property of SBS modified asphalt were improved was because reactive assistants increased mutual function between SBS and between SBS and the asphalt, this was good for the formation of the SBSnetworking in the asphalt, as well as after joined reactive assistants in the SBS modified asphalt, the polarity of the modified asphalt increased, this was good for improving the adhesive property and the high temperature anti- wheel rut ability of the SBS modified asphalt.