东南大学学报（英文版）2022，Vol.38Issue(1)：56-61,6.DOI:10.3969/j.issn.1003-7985.2022.01.009
单组分聚氨酯多孔弹性混合料固化及力学特性分析
Curing and mechanical property of single-component polyurethane porous elastic mixture
摘要
Abstract
The viscosity-time curve of a single-component polyurethane(PU)was examined to determine the mixing and compacting temperatures of its mixture and investigate the curing and mechanical properties of single-component PU porous elastic mixture(PPEM).The curing properties of the single-component PU and PPEM were studied with Fourier transform infrared spectroscopy(FTIR)and Marshall test.The mechanical properties of PPEM were explored via the following tests:rutting test,3-point bending test,soaked Marshall stability test,freeze-thaw splitting test,and Cantabro test.The effects of a water bath on the stability of aggregate-PU/asphalt mortar-aggregate systems were evaluated through a pull-out test and a shear test.The results show that the recommended mixing temperatures of toluene diisocyanate and methylene diphenyl diisocyanate range from 75 to 80℃and from 64 to 68℃,respectively.Room temperature(25℃)can be adopted as the compacting temperature of PPEM.PPEM can be fully cured in 4 d.Nevertheless,the water sprinkle method can obviously shorten the full curing time of PPEM.PPEM exhibites good resistance to rutting,brittle cracking,and raveling.The adhesive and shear strength of aggregate-PU/asphalt mortar-aggregate systems are negatively related to water bath duration.关键词
单组分聚氨酯/固化行为/力学特性/多孔弹性混合料Key words
single-component polyurethane/curing performance/mechanical performance/porous elastic mixture分类
交通工程引用本文复制引用
钟科,张勐,孙明志,韩丁丁..单组分聚氨酯多孔弹性混合料固化及力学特性分析[J].东南大学学报（英文版）,2022,38(1):56-61,6.基金项目
The Fundamental Research Funds for the Central Re-search Institute(No.2020-9054). （No.2020-9054）
