木屑生物沥青对沥青结合料流变特性的影响

发布时间：2018-04-19 17:32

本文选题：生物沥青 + 化学性质　；参考：《公路工程》2017年05期

【摘要】：探讨木屑生物沥青(MX)添加于传统沥青的流变特性。将MX和传统黏结料(70号沥青和90号沥青)分别依重量百分比1∶1、1∶2、1∶3及1∶4掺配,进行基本物理性质试验与使用动态剪切流变仪(DSR)于不同试验条件下研究沥青黏结料的流变行为,探讨不同MX添加于传统沥青的黏度与蠕变行为。研究结果表明:沥青黏结料的复合模量(G*)随MX含量增加而上升,相位角则反之,同时可降低老化现象并有助于抵抗车辙,由于MX含丰富矿物填充料,沥青黏结料容易产生离析现象。DSR试验得到MX改性沥青黏结料的零剪切黏度(ZSV)、稳态黏度(SSV)与低剪切黏度(LSV),三种黏度特性于低频时都不随剪应变率改变且黏度值相近,此区间的沥青黏结料特性稳定,因此可做为抗车辙指标。为木屑生物沥青的进一步的研究与工程应用奠定了理论基础。
[Abstract]:The rheological properties of conventional bitumen added with wood chip bio-bitumen (MX) were studied.Mix MX and traditional binders (70 asphalt and 90 asphalt) with 1: 1 1: 1 1: 2 1: 3 and 1:4 by weight, respectively,The rheological behavior of asphalt binder was studied under different experimental conditions by using dynamic shear rheometer (DSRs) and basic physical properties. The viscosity and creep behavior of asphalt added with different MX were discussed.The results show that the composite modulus of asphalt binder increases with the increase of MX content, and the phase angle is vice versa. At the same time, it can reduce the aging phenomenon and help to resist rutting. Because MX is rich in mineral fillers,It is easy to produce segregation phenomenon. DSR test shows that the zero shear viscosity of MX modified asphalt binder is ZSVV, the stable viscosity is SSV) and the low shear viscosity is LSV.When the three kinds of viscosity properties do not change with the shear strain rate at low frequency, the viscosity values are similar.The properties of asphalt binder in this section are stable, so it can be used as a rutting resistance index.It lays a theoretical foundation for further research and engineering application of wood chip bio-asphalt.
【作者单位】：重庆水利电力职业技术学院;
【基金】：国家自然科学基金项目(E080703)
【分类号】：U414

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