The changes of component and property of pitch road binder modified by rubber during ageing were studied by the heat ageing.In contrast to asphalt for pavement,the vaporization loss of pitch road binder modified was m...The changes of component and property of pitch road binder modified by rubber during ageing were studied by the heat ageing.In contrast to asphalt for pavement,the vaporization loss of pitch road binder modified was more than 20%,therefore,it might be considered that the vaporization loss of solvent oil affected on the component and property of pitch road binder at high temperature.Result showed that the oxidation of road binder was covered by the vaporization loss of solvent oil at higher temperature(130℃),while the property of road binder was in a steady state at lower temperature(60℃).The main reason caused vaporization loss of solvent oil was that there were a lot of high volatile polyaromatics containing in the pitch road binder.It was found that content of heptene soluble decreaesd,meanwhile,that of toluene insoluble increased during ageing.In addition,there was a extreme value of ductility during ageing.The key of modification was distillation of solvent oil.It put forward a direction to further improve its quality.展开更多
高温煤焦油沥青(high temperature coal tar pitch,HTCTP)具有优良的润湿性和黏结性,可用作黏结剂。HTCTP黏结剂能与炭质颗粒物料产生良好的固结作用,因此在不同类型炭质型材的制备中获得广泛的应用与研究,HTCTP高温过程的黏结性能及碳...高温煤焦油沥青(high temperature coal tar pitch,HTCTP)具有优良的润湿性和黏结性,可用作黏结剂。HTCTP黏结剂能与炭质颗粒物料产生良好的固结作用,因此在不同类型炭质型材的制备中获得广泛的应用与研究,HTCTP高温过程的黏结性能及碳化固结作用效果决定了炭质型材的机械强度和理化性能。本文综述了HTCTP作黏结剂制备炭质型材的一般工艺过程和相关研究进展,梳理了不同应用领域对HTCTP碳化固结作用的共性机制和个性特点,总结了HTCTP的性能影响因素及碳化固结作用机理。通过分析HTCTP不同组分在碳化固结过程中的作用及转化过程,揭示HTCTP碳化固结作用与炭质型材机械强度的关联机制及影响碳化固结强度的关键因素,提出强化HTCTP碳化固结作用的措施,提升HTCTP黏结剂在炭质型材制备中的应用效果。展开更多
文摘The changes of component and property of pitch road binder modified by rubber during ageing were studied by the heat ageing.In contrast to asphalt for pavement,the vaporization loss of pitch road binder modified was more than 20%,therefore,it might be considered that the vaporization loss of solvent oil affected on the component and property of pitch road binder at high temperature.Result showed that the oxidation of road binder was covered by the vaporization loss of solvent oil at higher temperature(130℃),while the property of road binder was in a steady state at lower temperature(60℃).The main reason caused vaporization loss of solvent oil was that there were a lot of high volatile polyaromatics containing in the pitch road binder.It was found that content of heptene soluble decreaesd,meanwhile,that of toluene insoluble increased during ageing.In addition,there was a extreme value of ductility during ageing.The key of modification was distillation of solvent oil.It put forward a direction to further improve its quality.
文摘高温煤焦油沥青(high temperature coal tar pitch,HTCTP)具有优良的润湿性和黏结性,可用作黏结剂。HTCTP黏结剂能与炭质颗粒物料产生良好的固结作用,因此在不同类型炭质型材的制备中获得广泛的应用与研究,HTCTP高温过程的黏结性能及碳化固结作用效果决定了炭质型材的机械强度和理化性能。本文综述了HTCTP作黏结剂制备炭质型材的一般工艺过程和相关研究进展,梳理了不同应用领域对HTCTP碳化固结作用的共性机制和个性特点,总结了HTCTP的性能影响因素及碳化固结作用机理。通过分析HTCTP不同组分在碳化固结过程中的作用及转化过程,揭示HTCTP碳化固结作用与炭质型材机械强度的关联机制及影响碳化固结强度的关键因素,提出强化HTCTP碳化固结作用的措施,提升HTCTP黏结剂在炭质型材制备中的应用效果。
