Influence of chemical composition on the physical characteristics of paving asphalts
Influence of chemical composition on the physical characteristics of paving asphalts
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DOI：
10.1080/10916460500528854
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发表时间：
2007-11-01
影响因子：
1.5
通讯作者：
Oyekunle, L. O.
中科院分区：
文献类型：
--
作者：
Oyekunle, L. O.
最简单的一般组成模型认为沥青由沥青质、重油和树脂组成。现在：研究已经仔细探索了从不同来源获得的各种类型的沥青的性质和组成之间的相似程度。它显示了延展性、针入度和软化点如何与软化点在41-58范围内的铺路沥青的化学性质相关。沥青的性质被发现是其化学成分的直接函数。软化点与沥青质含量之间呈线性关系，而同一软化点的沥青，很容易通过胶质含量来区分。对沥青质指数（I-A）和Gaestel指数（I-C）的评价表明，它们都与沥青质和胶质的组成呈线性关系，从而证实了它们在沥青表征中的适用性。两种指标的比较表明，IC更适合于评价不同类型沥青的胶体稳定性。所观察到的相关性，可以发现有用的沥青混合和再生领域，通过适当选择的沥青组分。
The simplest general compositional model considers asphalt to be made up of asphaltenes, heavy oils, and resins. In the present: study the extent of similarity between the properties and composition of various types of asphalt obtained from different sources has been carefully explored. It shows how ductility, penetration, and softening point are related to the chemical nature of paving asphalts in the range 41-58 softening points. Asphalt properties are found to be a direct function of its chemical constituents. The relationship between softening point and asphaltene content was found to be linear while asphalts of the same softening point are easily distinguished by the content of the resins. Evaluation of the two asphalt indices-the asphaltene index (I-A) and the Gaestel index (I-C), reveals that they both vary linearly with the composition of asphaltenes and resins thus confirming their suitability in the characterization of asphalts. Comparison of the two indices shows that IC is more suitable in estimating the colloidal stability of different groups of asphalts. The observed correlations can be found useful in the areas of asphalt blending and rejuvenating through the appropriate selection of asphalt components.