Preparation And Properties Of Montmorillonite And Styrene Butadiene Rubber Composites Modified Asphalt

With the high speed expand of economy in our country,road construction have been great developed.At present the construction of highway network is laid of alpine region in the west,styrene-butadiene rubber as asphalt modifier can obviously raise the low temperature property of asphalt.So the styrene-butadiene rubber modified asphalt were a large number of applications.However styrene-butadiene rubber asphalt softening point increase is not obvious,easy to hot oxygen aging,storage stability is bad.Therefore to improve the shortcoming of styrene-butadiene rubber asphalt become research hotspot.This article selects the styrene-butadiene rubber and montmorillonite preparation with the method of spray drying into a composite modifier,and create the comprehensive modified asphalt.For penetration, melting point, viscosity, extension, including the anti-aging performance and storage stability performance test,and do the microstructure analysis.The result shows that:use Shanghai FRUK high-speed shearing machine as the shearing equipment,composite modifier and asphalt matrix at 150℃high speed shearing 4 h,the cutting speed of 4000 r/min,get the modified asphalt.Montmorillonite layer in asphalt in stripping state structure,provides the modified asphalt outstanding road property and anti-aging property,the storage stability of modified asphalt are improved.Composite modifier amount to 3 PHR can provide the optimum content of anti-aging performance.Phosphoric acid polymer and styrene butadiene rubber asphalt road use performance and strimellitic anhydride as asphalt additives can be very good improve montmorillonite torage stability.