共查询到18条相似文献,搜索用时 281 毫秒
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测定了常用5种制造磺化沥青的原料沥青的族组成及软化点,在不同条件下进行磺化,制得理化性能和降滤失性能不同的一系列磺化沥青产品,系统地研究的沥青的组成、软化点,碘化剂用量对磺化沥青理化性能和降滤失性能的影响,提出了原料沥青的合理族组成和最佳磺化条件。 相似文献
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<正> 沥青是石油产品中具有特殊性质的粘稠弹性体,其使用性能与沥青的化学组成和胶体结构有密切关系,长期以来各国学者对这一领域进行大量研究。本文将近年来我们对我国原油直馏沥青的化学组成和使用性能研究的结果与国外几种直馏沥青的化学组成和使用性能做一对比,并结合我国原油的特点,对适宜生产直馏道路沥青的渣油的化学组成提出几点粗浅的看法,为生产选择合适的原料提供一些依据。 相似文献
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为研究乳化沥青储存稳定性与沥青组成及性质之间的关系,选用四种基质沥青,对其基本性质、四组分组成、元素组成和平均结构单元参数进行了分析。并分析了四种基质沥青制备的乳化沥青的储存稳定性。采用灰熵关联分析研究了乳化沥青储存稳定性与沥青的化学组成及基本性能之间的关系。结果表明:四组分组成中,胶质和沥青质含量是影响乳化沥青储存稳定性的最主要因素,胶质和沥青质含量越高,储存稳定性越好。元素组成中,杂原子含量是影响乳化沥青储存稳定性的最主要因素,杂原子含量越高,稳定性越好。然而,沥青的基本性质和平均结构单元参数与乳化沥青的储存稳定性之间没有明显的相关性。 相似文献
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Xiang Liu Zhengwei Zhang Xiaolong Yang Zhuangzhuang Liu 《Petroleum Science and Technology》2018,36(16):1258-1264
To evaluate sensitivity of moisture damage resistance with chemical composition of asphalt, the adhesion energy, debonding energy as well as compatibility ratio of 69 asphalt-aggregate combinations were calculated with thermodynamical models. Pearson correlation analysis and regression analysis were carried out to correlate the relationships between asphalt chemical composition (saturates, aromatics, resins, asphaltenes, and wax) and moisture stability of asphalt mixture. The results showed that more resins and less asphaltenes in asphalt could lead to better moisture stability of asphalt mixture under dry and wet conditions, which can be effectively predicted by multiple regression models with different asphalt chemical components. 相似文献
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针对克拉玛依沥青难以改性,产品稳定性差等问题,本研究采用化学改性法,对比分析了4种基质沥青在改性前后的元素组成、红外光谱、族组成、分子量的变化以及SBS改性沥青的常规性质的差异。结果表明:相对于物理改性,化学改性不仅显著降低了SBS改性沥青的反应温度,而且还提高了SBS改性沥青的高温性能。 相似文献
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The Theological properties of asphalt of different chemical compositions were assessed after treating them with sulphur at various reaction conditions. To correlate the observed alterations in the physical properties of the products with changes in the chemical composition, a study on model compounds was conducted to throw some light on this issue. 相似文献
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特立尼达湖沥青是世界上最有名的天然沥青,其物质组成和化学性质极其稳定。近年来,湖沥青凭借其良好的路用性能得到了越来越多的应用。首先对TLA改性沥青的性能及其在工程的使用情况进行了阐述,然后从沥青混合料的制备、运输、摊铺、碾压以及接缝处理方面详细分析了TLA改性沥青混合料的应用情况,最后通过室内试验及现场检测对TLA改性沥青路面的性能进行了分析。结果表明,TLA改性沥青混合料具有良好的高温稳定性和水稳定性,其路面压实度和平整度均符合规范要求,满足了交通等级为重交通的使用要求。TLA改性沥青的成功应用可为其在高速公路上的推广应用提供参考。 相似文献
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Abstract The Theological properties of asphalt of different chemical compositions were assessed after treating them with sulphur at various reaction conditions. To correlate the observed alterations in the physical properties of the products with changes in the chemical composition, a study on model compounds was conducted to throw some light on this issue. 相似文献
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用辽河高粘原油生产重交通道路沥青的研究——(Ⅲ)辽曙沥青组成与结构分析 总被引:1,自引:0,他引:1
利用元素分析,族组成分析和结构族组成分析方法,研究了辽曙沥青的组成与结构,建立了辽曙沥青组成与结构和使用性能之间的关系。辽曙沥青碳氢含量在95%以上,氢碳原子比在1.5左右;辽曙沥青平均分子全部是多环结构,每个平均分子中的含有45个碳原子,其中芳碳数为16-17个,总环数为5-6个,其中芳环数为3-4个,辽曙沥青的沥青质含量在8%-10%之间,胶质含量在25%-30%之间,芳香分含量在35%-40%之间,饮和分含量在20%-25%之间的族组成使沥青具有良好的性能。 相似文献
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《Petroleum Science and Technology》2007,25(11):1401-1414
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 (IA) and the Gaestel index (IC), 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. 相似文献