通过测定乳化沥青蒸发残留物15℃延度、25℃针入度、软化点、黏温性、四组分分布以及薄膜烘箱试验(TFOT)老化前后60℃动力黏度比、针入度比和软化点增量,考察纳米二氧化硅(SiO2)、羟乙基纤维素(HEC)和聚乙烯醇(PVA)3种稳定剂对乳化沥青蒸发残留物性能和乳化沥青蒸发残留物TFOT老化前后性能变化的影响.结果表明:3种稳定剂可显著降低蒸发残留物延度；当w(SiO2)=0 ～1.2％、w(HEC)=0～0.18％、w(PVA)=0 ～0.18％时,延度呈明显下降趋势,且降低幅度由大到小为加入SiO2、HEC、PVA;针入度受w(SiO2)影响较大,随w(SiO2)的增大呈明显下降趋势,而受w(HEC)和w(PVA)的影响不大;在60～110℃内,黏度随w(SiO2)增大而增大,w(HEC)和w(PVA)对黏度影响不大;3种稳定剂对软化点及四组分分布影响不明显；乳化沥青蒸发残留物老化前后60℃动力黏度比、软化点增量和针入度比受w( SiO2)影响较大,随w(SiO2)的增大分别呈现下降、下降和增大趋势,而受w(HEC)和w(PVA)的影响不大.%The effects of three stabilizers, nano-SiO2, hydroxyethyl cellulose (HEC) and polyvinyl alcohol (PVA) on the performance of asphalt emulsion evaporation residue (emulsion residue) were investigated by measuring the ductility at 15 ℃ , penetration at 25 ℃ , softening point, viscosity-temperature characteristics of emulsion residue, as well as dynamic viscosity ratio at 60 ℃ , penetration ratio and softening point increment of emulsion residue before and after thin-film oven test ( TFOT) aging. The results show that the ductility of the emulsion residue decreases substantially by the addition of three stabilizers. When the contents'of nano-SiO2, HEC and PVA are 0-1. 2% ,0-0. 18% and 0-0. 18% respectively, the ductility of emulsion residue decreases significantly by addition of nano-SiO2, followed by addition of HEC and PVA. The penetration of emulsion residue decreases sharply when the nano-SiO2 content in the emulsions increases and changes slightly as the HEC and PVA content increases. The viscosity of emulsion residue increases with the increase of nano-SiO2 content in the emulsions and remains unchanged with the increase of HEC and PVA content at temperatures of 60-110℃. Three stabilizers exert very little effect on the softening point and distribution of SARA components of emulsion residue. The dynamic viscosity ratio at 60 ℃ , softening point increment and penetration ratio of emulsion residue before and after TFOT aging are impacted considerably by nano-SiO2, and they decrease, decrease and increase respectively with the increase of SiO2 content in the e-mulsions and change slightly with HEC and PVA content increasing.
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