基于固体颗粒的纳米乳化沥青制备与路用性能研究

Preparation and Road Performance of Nano Emulsified Asphalt Based on Solid Particles

针对黏结层路用性能不足导致沥青路面产生推移、坑槽等早期病害现象日益严重的问题,本文首先基于固体颗粒稳定乳液的Pickering乳液体系,制备了纳米SiO_(2)乳化沥青,并将其与高胶乳化沥青复配成纳米乳化沥青;然后通过基础性能试验确定了纳米乳化沥青最佳配方;最后制备出乳化沥青A、乳化沥青B和普通乳化沥青,并作为对比组进行路用性能试验。结果表明:纳米乳化沥青在储存稳定性方面优势明显,且高温稳定性要优于其他3种乳化沥青。初步判断纳米乳化沥青应用在黏结层中效果较好,比其他3组乳化沥青在储存稳定性与路用性能方面更具优势。

In response to the increasingly serious problems of early diseases such as displacement and potholes in asphalt pavement caused by insufficient pavement performance of the bonding layer,based on Pickering lotion system of solid particle stabilized lotion,nano-SiO_(2) emulsified asphalt was prepared firstly,and mixed with high adhesive emulsified asphalt to form nano emulsified asphalt.Then,the optimal formula of nano emulsified asphalt was determined through basic performance tests.Finally,emulsified asphalt A,emulsified asphalt B,and ordinary emulsified asphalt were prepared and used as a comparison group for road performance testing.The results indicate that nano emulsified asphalt has significant advantages in storage stability,and the high-temperature stability is superior to the other three types of emulsified asphalt.Preliminary judgment shows that the application of nano emulsified asphalt in the bonding layer has a good effect,and it has more advantages in storage stability and road performance compared to the other three groups of emulsified asphalt.