Fabrication and Properties Evaluation of Modified Asphalt Emulsions

• Main Authors: Ying-Ting, Lin, 林映廷
• Other Authors: Ping-Szu, Tsai
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/4pz6jy

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 106 === The asphalt emulsions were thermodynamically unstable. The phenomenon of coalescence causes asphalt emulsions to solidify. Therefore, the purpose of this study was to develop asphalt emulsions with properties of high stability and re-dispersion. The first part of the experiment used cationic surfactants and modi-fiers to prepare cationic asphalt emulsions, then investigated the effect of modifiers on stability and other characteristic. The second part used acrylic emulsions to modify the anionic asphalt emulsions, discussed the effect of acrylic emulsions on aggregate adhesion, hydrophobicity and high temperature resistance. The experimental results showed that under the same emulsifying parameters, the storage stability of asphalt emulsions increased with in-creasing amount of modifier, the coalescence of asphalt emulsions could be avoided. On the condition of adding amounts of aromatic modifier and aliphatic modifier were: 5.66 wt% and 3.85 wt%, the zeta potential will be 17.6 mV and 16.2 mV, the average particle size of both asphalt emulsions decreased from 6.73 μm to 3.5 μm. The data of DSR experi-ment showed that the rheological master curves of AC-10 and asphalt emulsions kept the same. Two modifiers both influence the storage modulus (G') of the asphalt under high temperature and high frequency conditions, but the loss modulus(G'') kept the same. The results of the second part showed that the addition of 10% acrylic emulsions could improve the high temperature resistance and storage stability of the asphalt emulsions and the grade of aggregate ad-hesion of CNS 10370 above class 4. With the addition of acrylic emul-sions from 0 wt% to 30 wt%, the contact angle of the water droplets of asphalt films increased from 5° to 80°. It is expected to have considerable potential for the application of waterproof coatings.