无砟轨道路基翻浆冒泥整治用聚氨酯灌浆材料的研制

Study on preparing polyurethane grouting material for renovating mud pumping of ballastless track subgrade

以多亚甲基多苯基异氰酸酯(PAPI)、聚醚多元醇、1,4-丁二醇、三丙醇胺、溶剂油和水为原料,通过探讨不同因素对材料膨胀压、弹性模量和黏度等性能的影响,制备出无砟轨道路基翻浆冒泥整治用PU(聚氨酯)灌浆材料。研究结果表明:当w(水)=0.6%、w(1,4-丁二醇)=10%、w(三丙醇胺)=15%和w(溶剂油M)=8%(均相对于多元醇和交联剂总质量而言)时,灌浆材料在发泡膨胀后的弹性模量超过200 MPa、黏度低于300 m Pa·s,可用于无砟轨道路基翻浆冒泥的灌浆整治。

With multi-methylene muhi-phenyl isocyanate （PAPI） , polyether polyol, 1,4- butyl glycol, tripropanolamine, solvent oil and water as raw materials, a polyurethane （PU） grouting material for renovating mud pumping of ballastless track subgrade was prepared by discussing influences of different factors on expansion pressure, elastic modulus, viscosity and other properties of material. The research results showed that the grouting material can be used for renovating mud pumping of ballastless track subgrade because its elastic modulus after foaming expansion was more than 200 MPa, and viscosity was lower than 300 mPa·s when mass fractions of water, 1,4- butyl glycol, tripropanolamine, and solvent oil were 0.6%, 10%, 15% and 8% respectively in total polyol and crosslinker.