Sbs Technical Performance And Morphology Of Polymer Modified Asphalt Research

With the rapid development of highway transportation in our country day by day , the material requirements to the super-highway bitumen pavement has become more and more strict , SBS polymer modified asphalt has been applied widely for its excellent pavement performance in the highway construction. But the properties of varied SBS modified asphalts diverge greatly because of their difference on producing methods and on SBS modifier sorts.On the backgrounds of researches inside and outside country , and cooperating experiments with theories analyses , the influence of different processing technology parameters and different SBS modifier sorts on the SBS modified asphalts' properties has been studied . At the same time, their microstructure are observed through Fluorescence optical microscopy and scanning electronic microscopy , thus to direct modified asphalt production. On the above conclusion's basement , analysing some disadvantages of the storage stability test of SBS modified asphalt in the current specification , a new storage stability test apparatus is developed . With the help of microscopic means , the Dynamic Shear Rheometer(DSR) test has been conductedusing the new apparatus . A new index-Rs(ratio of separation) has been broughtforward to evaluate the SBS modified asphalt's storage stability in this paper . Finally, aiming the unstable SBS modified asphalt , some improvement measures have been presented , and to add some specific compatilizer and stabilizer has been demonstrated to be valid measures by the studies.