废旧PE复合改性沥青储存稳定性及性能研究

Research on the storage stability and performance of waste PE composite modified asphalt

为研究废旧聚乙烯(WPE)复合改性沥青的特性,首先对WPE复合改性沥青储存稳定性进行研究,随着油污泥热解残渣与1.5%的硅烷偶联剂(POS+1.5%)的掺量比的提升,WPE改性沥青的上下软化点在不断减小,当WPE/POS+1.5%的比例大于100/30之后,软化点差值控制在3.0以内,离析现象得到缓解。通过对沥青常规性能研究可知,WPE复合改性剂掺量在6%和8%时,随着C9石油树脂的增加,针入度值不断下降,而软化点不断上升,延度值先上升后下降。高低温性能上WPE复合改性剂/C9石油树脂最佳掺量分别为8%/8%和2%/4%。

In order to study the characteristics of waste polyethylene(WPE)composite modified asphalt,the storage stability of WPE composite modified asphalt was first studied.With the increase of the ratio of oil sludge pyrolysis residue to 1.5%silane coupling agent(POS+1.5%),the upper and lower softening points of WPE modified asphalt continued to decrease.When the ratio of WPE/POS+1.5%was greater than 100/30,the difference in softening points was controlled within 3.0,and the segregation phenomenon was alleviated.Through the study of the conventional performance of asphalt,it is known that when the dosage of WPE composite modifier is 6%and 8%,the penetration value continuously decreases with the increase of C9 petroleum resin,while the softening point continuously increases,and the ductility value first increases and then decreases.The optimal dosages of WPE composite modifier/C9 petroleum resin for high and low temperature performance are 8%/8%and 2%/4%,respectively.