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Effects of Preparation Conditions on the Properties of Crumb Rubber Modified Binder

机译：制备条件对碎胶改性粘结剂性能的影响

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摘要

Various types of additives are used frequently in order to improve the rheological and mechanical properties of bituminous mixtures. Small devices instead of full scale machines are used for bitumen modification in the laboratory. These laboratory scale devices vary in terms of their properties such as mixing rate, mixing blade and the amount of binder. In this study, the effect of mixing rate and time during the bitumen modification processes on conventional and rheological properties of pure and crumb rubber modified binder were investigated. Penetration, softening point, rotational viscosity (RV) and dynamic shear rheometer (DSR) tests were applied to pure and CR modified bitumen. It was concluded that the penetration and softening point test did not show the efficiency of CR obtained by different mixing conditions. Besides, oxidation that occurred during the preparation processes plays a great part in the improvement effects of the modified binder.
机译：为了改善沥青混合物的流变学和机械性能，经常使用各种添加剂。在实验室中，使用小型设备代替大型机器进行沥青改性。这些实验室规模的设备在其性能方面有所不同，例如混合速率，混合刀片和粘合剂的量。在这项研究中，研究了沥青改性过程中混合速率和时间对纯橡胶和生胶改性粘合剂的常规和流变性能的影响。将渗透率，软化点，旋转粘度（RV）和动态剪切流变仪（DSR）测试应用于纯和CR改性的沥青。结论是，渗透率和软化点测试未显示出通过不同混合条件获得的CR的效率。此外，在制备过程中发生的氧化在改性粘合剂的改善效果中起很大作用。

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