Western Collapsible Loess Area Road Is Asphalt Climate Applicability

On the surrey of cllapsibility loessland meteorological data ,the paper refer to America SHRP research findings , conduct climate district and regard road use performance of asphalt as control objectives tocllapsibilityloessland ,this will provide a certain frame of reference when asphalt is used in the area.The character of asphalt and modified asphalt has great effection on asphalt pavement performance.On the base of both here and abroad' s research this paper will study regular of asphalt and modified asphalt, ultimatey analyze and research all kinds of modified asphalt characters have gained the following regulars :with the adding of modifier dosage, modified asphalt' s high and low temperature performance has being improved to different extent . Experimental result has showed: asphalt and modifier exist consistent question, it is different there are modification effect when asphalt is added different modifiers; in the same way,there are different modification effect when same modifier is imputed different asphalt.This paper adopt SHRP advanced test equipment and make PG grade toward several typic asphalt in cllapsibilityloessland , research asphalt SHRP index regular ..analyze and compare with routine index. Finally compare different area climate district with asphalt PG grade to general evaluate SHRP index suitability in china.Asphalt character plays on important role in asphalt mixture character, but asphalt and mineral powder integrate action in the asphalt mixture.lt is difficult to determine that the character of asphalt and mineral powder integrate change and how they have changed by typic test index. So this paper has combined asphalt typic test index with SHRP test index to research the character of high and low temperature of scale of mineral powder and asphalt ,then arrive at a conclusion :the same asphalt adhesive cement can enhance its high temperature character with the augment of scale mineral fines.but reduce its low temperature resistance dehisce capability . The character of asphalt rubber solution not only relates to mineral powder dosage but relates to asphalt kind and grade. Therefore, we should comprehensively considerate the asphalt rubber solution character of high and low temperature, choose reasonable scale of mineral fines and asphalt.