乳化沥青粒度与稳定性的影响因素及其相关性考察

摘要

采用激光粒度法和贮存稳定性试验考察乳化剂、皂液pH值、贮存温度、贮存时间对乳化沥青的粒度和贮存稳定性的影响,利用灰色关联理论分析了稳定性和粒度与各因素之间的关联度,并探讨了两者之间的相关性.结果表明:各因素对乳化沥青的平均粒径和稳定性的影响规律是一致的,两者呈现出较好的相关性.随着乳化剂用量的增加,平均粒径减小、贮存稳定性变好,最后两者都趋于稳定；随着皂液pH值和贮存温度的升高,平均粒径变大,贮存稳定性变差；随着贮存时间的增加,平均粒径呈变大的趋势,贮存稳定性逐渐变差.由灰色关联分析可知稳定性与各因素之间的关联度由大到小顺序为:皂液pH值、贮存温度、乳化剂、沥青类型、贮存时间,粒度与各因素之间关联度由大到小的顺序为:皂液pH值、贮存温度、乳化剂、贮存时间、沥青类型.%The influence of emulsifier,soap solution pH value,storage time,storage temperature on the particle size and stability of bitumen emulsion was investigated by means of laser particle size analysis and residue content difference tests.The correlation degree between stability/particle size and various factors was analyzed based on the gray relation theory,and the correlation between stability and particle size was also investigated.Results show that there are good correlations between the influencing factors with the particle size and stability of bitumen emulsion.When the dosage of emulsifier is increased,the particle size and storage stability are both reduced,creating more stable emulsions,then the trend tends to be stable at last.The particle size and storage stability are both increased as pH value of the system and storage temperature increases.The particle size and storage stability increases firstly and then comes to a plateau with storage time increasing.The gray correlation analysis shows that the correlation between the stability and various influencing factors descends in the order:pH value＞storage temperature＞emulsifier＞asphalt type＞storage time,while the correlation between the particle size and various factors decreases in the order.pH value＞the storage temperature＞emulsifier＞storage time＞asphalt types.