SBS胶乳改性乳化沥青制备技术研究

研制了一种新型改性剂——SBS胶乳,用于对乳化沥青进行改性制备改性乳化沥青。通过考察乳化剂用量对改性乳化沥青贮存稳定性的影响,得出乳化剂的最佳用量(w)为1%;通过考察SBS胶乳对沥青软化点、延度和针入度的影响,得出SBS胶乳改性剂的最佳用量(w)为6%;由光学显微镜分析得出,SBS颗粒和沥青颗粒的大小、密度相近,这是保证SBS在体系中均匀分散的重要因素。根据确定的乳化剂和改性剂的最佳用量,制备出了性能优良的改性沥青乳液。

STUDY ON THE PREPARATION OF EMULSIFIED SBS MODIFIED ASPHALT EMULSION

A novel modification agent, emulsified SBS, was developed to prepare modified asphalt emulsion. The effect of emulsifier dosage on the storage stability of modified asphalt emulsion was studied and the results showed that the optimum emulsifier dosage was 1%. By investigating the effect of emulsified SBS dosage on the softening point, ductility and penetration of modified asphalt emulsion, an optimum emulsified SBS dosage of 6% was obtained. It was shown by the analysis results of optical microscope that when the particle size and density of the particles of SBS and asphalt were similar, the SBS particles could be dispersed uniformly in the system. Based on the above optimum dosages of emulsifier and modification agent, a modified asphalt emulsion having excellent performance was prepared.