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Rheological characterisation of synthetic binders and unmodified bitumens

机译:合成粘合剂和未改性沥青的流变学表征

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This paper deals with the characterisation of the linear viscoelastic and steady-state flow properties of commercial pigmentable synthetic binders and unmodified bitumens. From the experimental results obtained, we may conclude that both types of materials show a thermo- rheologically simple linear viscoelastic behaviour in the temperature range studied (5deg.C--50deg.C), although synthetic binders are thermo- rheologically complex materials in steady-state flow. Both of them display a predominant viscous behaviour within the linear viscoelasticity region. Synthetic binders are characterised by an apparent shift of the terminal zone of the relaxation spectrum to lower frequencies, probably related to the development of entanglements among macromolecule components, and by the highest values of the zero-shear-rate limiting viscosity.
机译:本文研究了商用可着色合成粘合剂和未改性沥青的线性粘弹性和稳态流动特性。从获得的实验结果,我们可以得出结论,尽管合成粘合剂是稳定的热流变复杂材料,但两种材料在所研究的温度范围内(5℃--50℃)均表现出热流变简单的线性粘弹性行为。状态流。它们都在线性粘弹性区域内显示出主要的粘性行为。合成粘合剂的特征在于,弛豫谱的末端区域明显转移至更低的频率,这可能与大分子组分之间的缠结的发展有关,并且零剪切速率极限粘度最高。

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