聚乙二醇改性沥青性能研究

Research on Performance of PEG Modified Asphalt

为研究聚乙二醇改性沥青的技术性能,测定了不同聚乙二醇掺配率下沥青的布氏黏度、针入度、软化点和延度指标,对聚乙二醇改性沥青的性能进行了分析;通过对残留针入度比和残留延度的测定,分析了聚乙二醇改性沥青的老化性能;通过黏度-剪切速率曲线,分析了聚乙二醇改性沥青的流变特性;通过黏温曲线获得聚乙二醇改性沥青路面的施工温度,并进行了分析.研究结果表明,随着聚乙二醇掺配率的增加,沥青的黏度增加、针入度减小、软化点升高、延度降低;聚乙二醇改性沥青的耐老化性能优于原基质沥青;聚乙二醇改性沥青在163℃的条件下呈现一定的非牛顿特性;通过黏温曲线获得的聚乙二醇改性沥青混合料的施工温度略高于普通沥青混合料.

For the research of the technology performance of PEG modified asphalt,the brookfield viscosity,penetration,softening point and ductility was determined,and the performance of the PEG modified asphalt was analyzed.Through the determination of residual penetration ratio and residual ductility,the aging performance of PEG modified asphalt was analyzed; through the viscosity-shear rate curve,the rheological property of asphalt was analyzed; the construction temperature of PEG modified asphalt mixture was obtained through the viscosity-temperature curve and it was analyzed.The results show that with the increase of the blending rate of PEG,viscosity and softening point increases and penetration and ductility decrease; the ageing performance of PEG modified asphalt is better than the matrix asphalt; the PEG modified asphalt under 163℃ presents the non-newtonian feature ; the construction temperature of PEG modified asphalt mixture obtained through the viscosity-temperature curve slightly higher than the common asphalt mixture.