有机坡缕石改性沥青制备及性能研究 王田昊,李建阁,单宝增,贾猛,杜沛东 (长安大学公路学院,陝西西安710064) 瘸要:为改善沥青高温性能及改性沥青储存稳定性,基于坡缕石的物理化学特性,经 有机化处理,对沥青进行改性,制备有机坡缕石改性沥青,并通过沥青基本物理性 能试验研究其物理指标变化,借助动态剪切流变试验(DSR)、 Brookfield旋转粘 度试验,分析有机坡缕石改性沥青的高温流变性能及粘温特性,通过离析试验,分 析有机坡缕石改性沥青储夺稳定性。结果表明,掺加了有机坡缕石的改性沥青软化 点明显升高,针入度和延度有所降低,说明其对高温性能改善明显,对低温性能存 在一定不利影响。坡缕石经有机化处理,可提高改性沥青的高温粘度。随有机坡缕 石掺量的増加,改性沥青抗车辙因子逐渐増大,当有杋坡缕石掺量超过3%后,其掺 量的増多对沥青高温性能进一步提升效果并不显著。对坡缕石进行有机化处理可以 提高改性沥青储存稳定性。 关键词 改性沥青;有机坡缕石;物理性能;流变性能;储存稳定性 Preparation and properties of Organic Palygorskite Modified Asphalt Wang Tian-hao, Li Jian-ge, Shan Bao-zeng, Jia Meng, Du Pei-dong (School of Highway, Chang an University, XI'an 710064, Chin Abstract: In order to improve the high temperature performance of asphalt and the storage stability of modified asphalt, the organic palygorskite was prepared to modify the asphalt based on the physical and chemical properties of palygorskite. The basic physical properties of organic palygorskite modified asphalt were test and its high temperature rheological properties and viscosity-temperature characteristics were analyzed by the means of dynamic shear rheological test(DSR) and Brookfield rotational viscosity test. And its storage stability was analyzed by the separation test. The results show that the softening point of modified asphalt with organic palygorskite is obviously increased, while the penetration and ductility are reduced. It an be found that the organic palygorskite has an obvious improvement on high temperature performance and an adverse effects on low temperature performance of the modified asphalt. The high temperature viscosity of the modified asphalt could be increased after the palygorskite was treated organically. The anti-rutting factor increase in amount of organic palygorskite has no significant effect on the high temperature performance after its amount exceeds 3%. What's more, the organic treatment of palygorskite could improve the storage stability of modified asphalt key words: modified asphalt; organic palygorskite; physical properties; rheological properties; storage stability (c)1994-2019ChinaAcademicJournalElectronicpUblishingHouse.Allrightsreservedhttp://www.cnki.net有机坡缕石改性沥青制备及性能研究 王田昊，李建阁，单宝增，贾猛，杜沛东 （长安大学公路学院，陕西 西安 710064） 摘 要： 为改善沥青高温性能及改性沥青储存稳定性，基于坡缕石的物理化学特性，经 有机化处理，对沥青进行改性，制备有机坡缕石改性沥青，并通过沥青基本物理性 能试验研究其物理指标变化，借助动态剪切流变试验（DSR）、Brookfield 旋转粘 度试验，分析有机坡缕石改性沥青的高温流变性能及粘温特性，通过离析试验，分 析有机坡缕石改性沥青储存稳定性。结果表明，掺加了有机坡缕石的改性沥青软化 点明显升高，针入度和延度有所降低，说明其对高温性能改善明显，对低温性能存 在一定不利影响。坡缕石经有机化处理，可提高改性沥青的高温粘度。随有机坡缕 石掺量的增加，改性沥青抗车辙因子逐渐增大，当有机坡缕石掺量超过 3%后，其掺 量的增多对沥青高温性能进一步提升效果并不显著。对坡缕石进行有机化处理可以 提高改性沥青储存稳定性。 关键词： 改性沥青；有机坡缕石；物理性能；流变性能；储存稳定性 Preparation and Properties of Organic Palygorskite Modified Asphalt Wang Tian-hao，Li Jian-ge，Shan Bao-zeng，Jia Meng，Du Pei-dong (School of Highway , Chang'an University, Xi'an 710064, China) Abstract: In order to improve the high temperature performance of asphalt and the storage stability of modified asphalt, the organic palygorskite was prepared to modify the asphalt based on the physical and chemical properties of palygorskite. The basic physical properties of organic palygorskite modified asphalt were test and its high temperature rheological properties and viscosity-temperature characteristics were analyzed by the means of dynamic shear rheological test (DSR) and Brookfield rotational viscosity test. And its storage stability was analyzed by the separation test. The results show that the softening point of modified asphalt with organic palygorskite is obviously increased, while the penetration and ductility are reduced. It can be found that the organic palygorskite has an obvious improvement on high temperature performance and an adverse effects on low temperature performance of the modified asphalt. The high temperature viscosity of the modified asphalt could be increased after the palygorskite was treated organically. The anti-rutting factor of modified asphalt gradually increased with the increase of content of organic palygorskite. However, the increase in amount of organic palygorskite has no significant effect on the high temperature performance after its amount exceeds 3%. What’s more, the organic treatment of palygorskite could improve the storage stability of modified asphalt. key words: modified asphalt; organic palygorskite; physical properties; rheological properties; storage stability