等离子体微表处理后胶粉改性沥青高温性能研究

Study on High Temperature Performance of Plasma Treated Rubberized Asphalt Binders

为进一步扩大胶粉改性沥青的应用范围,加大资源回收再利用效率,改善其高温性能,采用低温等离子体技术对胶粉进行活化处理,分别通过接触角试验、扫描电镜技术、针入度试验、软化点试验、动态剪切流变试验对胶粉及其改性沥青性能进行研究。结果表明,等离子体处理后胶粉亲水性能得到改善,表面更加粗糙,且出现孔洞和层状结构,增强了胶粉和沥青之间的粘结性能。针入度、软化点和动态流变剪切试验表明,等离子体微表处理后胶粉改性沥青高温性能得到明显提高。

In order to further expand the application scope of rubber powder modified asphalt,increase the efficiency of resource recovery and improve its high temperature performance,it is proposed to use low temperature plasma technology to activate the rubber powder.Researches are made by various experiments including contact angle test,SEM test,penetration test,softening point test and dynamic shear rheological test and so on.The results show that the hydrophilic properties of the powder are improved after the plasma treatment.At the same time,it is apparent that noticeable changes occur after treating with plasma technology and a rougher and stratiform structure is formed on surface,which can reinforce the adhesive property between crumb and asphalt binder.Additionally,penetration,softening point and dynamic rheological shear tests show that the high temperature performance of rubber powder modified asphalt is obviously improved after the plasma treatment.