废弃玻璃钢粉改性沥青材料制备与性能研究  

Preparation and properties of waste glass⁃fiber⁃reinforced plastic⁃modified asphalt

作　　者：胡晨光 苏航 封孝信 丁锋[3] 李恩硕 付佳伟 HU Chenguang;SU Hang;FENG Xiaoxin;DING Feng;LI Enshuo;FU Jiawei(College of Materials Science and Engineering,North China University of Science and Technology,Tangshan 063210,China;Laboratory of Inorganic Material of Hebei Province,Tangshan 063210,China;Tangshan Transportation Bureau,Tangshan 063000,China)

机构地区：[1]华北理工大学材料科学与工程学院,河北唐山063210 [2]河北省无机非金属材料重点实验室,河北唐山063210 [3]唐山市交通运输局,河北唐山063000

出　　处：《中国塑料》2022年第8期119-126,共8页China Plastics

基　　金：河北省高端钢铁冶金联合基金项目(E2020209010);唐山市科技计划项目(19150225E)。

摘　　要：为提高玻璃钢(GFRP)管道废弃物的利用率,研究了废弃GFRP粉粒径、掺量及剪切制度(温度、时间、速率)对改性沥青延度、针入度及软化点的影响规律,利用偏光显微镜(PLM)、红外光谱仪(FTIR)分析了其微观结构。结果表明,废弃GFRP中热固性树脂可与沥青反应生成环烷烃和脂肪烃,其中脂肪烃含量增加将提高沥青延度,废弃GFRP掺量过高则环烷烃含量增加,不利于沥青延度提升;玻璃纤维可降低沥青针入度和提高其高温稳定性,掺量过高却会形成更多缺陷致使延度下降,但有利于沥青硬度提高;剪切温度过低或过高时,改性沥青中形成的环烷烃含量均升高,不利于沥青延度提升,但剪切温度对改性沥青高温稳定性影响不显著;当剪切机转速达到一定值时,增加剪切机转速对改性沥青性能影响较小,而延长剪切时间却有利于其性能提高;最佳改性制度为粒径<0.3 mm、掺量4%、改性温度150℃、剪切时间4 h、剪切机转速8000 r/min。To improve the utilization rate of waste glass⁃fiber⁃reinforced plastic(GFRP)pipe,the effects of particle size,dosage,and shear conditions,such as temperature,time and rate,of waste GFRP powders on the ductility,penetration,and softening point of modified asphalt were investigated.The microstructure of modified asphalt was analyzed using polarizing microscope and infrared spectroscopy.The results indicated that the thermosetting resin in waste GFRP could react with asphalt to produce naphthenic hydrocarbons and aliphatic hydrocarbons.The increase of aliphatic hydrocarbon content increased the ductility of asphalt,and the excessive content of waste GFRP increased the formation of naphthenic hydrocarbons.This was disadvantageous to the improvement of asphalt ductility.Meanwhile,glass fiber reduced the penetration of asphalt and improved its high⁃temperature stability.If the content of glass fiber was too high,more defects were formed at an over high content of glass fiber,resulting in a decrease in ductility.This was disadvantageous to the improvement of asphalt hardness.In addition,a too low or too high shear temperature resulted in an increase in the con⁃tent of naphthenic hydrocarbons in the modified asphalt.This was disadvantageous to the improvement of asphalt ductili⁃ty.However,the influence of shear temperature on the high temperature stability of the modified asphalt was not obvi⁃ous.Moreover,when the shear rate reached a certain value,an increase in shear rate generated few effects on the perfor⁃mance of the modified asphalt,and the increase of shear time was beneficial to an improvement in its performance.The optimal modification system was determined to be a particle size smaller than 0.3 mm,a dosage of 4%,a modification temperature of 150°C,a shear time of 4 h,and a shear rate of 8000 r/min.

关 键 词：废弃玻璃钢 基质沥青 剪切制度 微结构 性能 

分 类 号：TQ327.11[化学工程—合成树脂塑料工业]