SBS改性乳化沥青的制备及其路用分级性能

打开文本图片集

中图分类号：U414 文献标志码：A

Abstract：The bonding strength ofordinary emulsifiedasphaltis insuficient tomeet therequirementsof preventive maintenance or cold mixing and cold paving.SBS modifiedemulsifedasphalt （SBS-Emu）was prepared by modifying first and thenemulsifying.TheefectsofSSmodifier，activatedcros-lnker，emulsifierand stabilizercontenton SBS-Emu storage stability，particle size distribution androad performance based on emulsified asphalt performance graded （EPG）system were investigated.Theresultsshowthatthestorage stabilityofSBS-Emu deteriorates withtheincreaseofSBScontentandbecomes betterwiththeincreaseofemulsionstabilizerandemulsifierscontent.Activatedcross-lnkerscanimprove thestorage stabilityof emulsifiedasphalt withincertain limits.Thehigh-temperatureperformanceandlow-temperatureperformanceof SBSEmuincreases withtheincreaseof SBS content.Croslinking stabilizerscan improve the high-temperature performanceand low-temperature performanceof SBS-Emuinacertainconcentrationrange.The high temperatureperformanceisthebest when the content is 1.5% ，and the low temperature performance is the best when the content is 1.0% .The low temperature performance ofSBS-Emuisimproved with increasing emulsifiercontent，andtheexcesivecontent isunfavorabletothe high temperature performance.Emulsionstabilizer has litle efectonthehigh temperatureperformanceandlow temperatureperformance of SBS-Emu.

Keywords： SBS emulsified asphalt； EPG grading； storage stability；particle size distribution

热拌沥青（HMA）混合料因生产施工过程中消耗大量能源并产生显著环境污染而备受关注[1-2]与HMA相比，乳化沥青冷拌技术（CMA）可节省50% 以上能源，并减少 33% 二氧化碳和 17% 挥发性有机化合物排放，同时缓解沥青老化问题[3-5]。（剩余15682字）