共查询到18条相似文献,搜索用时 62 毫秒
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以90#普通沥青为原料,苯乙烯-丁二烯嵌段共聚物(SBS)为改性剂,橡胶类复合改性剂为添加剂,调和油为软化剂,在后三者加入质量分数依次为6%,6%,40%的条件下,制备出低温水工沥青,并对工业试生产的低温水工沥青及其混凝土性能进行了评价。结果表明:试生产的低温水工沥青具有良好的耐高低温性能,产品性质稳定,脆点达到-28℃,延度(5℃)达到84 cm以上,薄膜烘箱实验后脆点略有上升;低温水工沥青混凝土孔隙率、斜坡流淌值等均满足DL/T 5411—2009要求,其拉伸应变(0℃)和弯曲应变(0℃)高于基质沥青混凝土。 相似文献
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近年来沥青混凝土作为防渗材料,在我国水工建筑中得到了广泛应用。与道路工程的沥青混凝土不同的是,水工沥青混凝土具有良好的粘弹性及抗渗性。目前,国家规范对填充料的细度尚无明确规定,通过调整沥青混凝土的填充料细工,对沥青混凝土的各项性能进行了系统的试验和分析,研究表明:适宜的填充料细度及掺量,能有效地改善沥青混凝土性能,提高其抗渗性。 相似文献
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水工石油沥青开发的研讨 总被引:1,自引:1,他引:0
通过对克拉玛依水工沥青、欢喜岭轻度氧化沥青等几种国内优质沥青基本性能和配合比的性能试验、分析,通过已建成工程取样试验结果对比,表征国产优质沥青已基本满足十三陵抽水蓄能电站上池严酷的运行条件,特别是克拉玛依水工沥青性能最好. 相似文献
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用于堤坝防渗的水工沥青混凝土具有较高的沥青和矿粉含量,其粗骨料的粒径一般要求较小,并有特定的级配.根据水库的运行情况,防渗面板的防渗层、排水屡、整平胶结层等,应满足不同的结构性能和抗渗性能的要求.本文对防渗面板沥青混凝土的配合比进行了探讨. 相似文献
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Samuel Asomaning 《Petroleum Science and Technology》2003,21(3):581-590
The high cost of remediating asphaltene deposition in crude oil production and processing has necessitated the development of test methods for determining the stability of asphaltenes in crude oils. In the current work, the stability of asphaltenes in crude oils of varying API gravity is predicted using the Oliensis Spot Test, the Colloidal Instability Index, the Asphaltene-Resin ratio, and a solvent titration method with NIR solids detection. The test methods are described in detail and experimental data from them presented. The experimental stability data were validated via correlation with field deposition data. The effectiveness of the various tests as predictors of the stability of asphaltenes in oils is discussed. The Colloidal Instability Index and the solvent titration method were found to predict a crude oil's propensity towards asphaltene precipitation better than both the Asphaltene-Resin ratio and the Oliensis Spot Test. For oils with low asphaltene content where most stability tests fail, live oil depressurization is proposed as the test for predicting the stability of asphaltenes. 相似文献
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《Petroleum Science and Technology》2013,31(3-4):581-590
Abstract The high cost of remediating asphaltene deposition in crude oil production and processing has necessitated the development of test methods for determining the stability of asphaltenes in crude oils. In the current work, the stability of asphaltenes in crude oils of varying API gravity is predicted using the Oliensis Spot Test, the Colloidal Instability Index, the Asphaltene–Resin ratio, and a solvent titration method with NIR solids detection. The test methods are described in detail and experimental data from them presented. The experimental stability data were validated via correlation with field deposition data. The effectiveness of the various tests as predictors of the stability of asphaltenes in oils is discussed. The Colloidal Instability Index and the solvent titration method were found to predict a crude oil's propensity towards asphaltene precipitation better than both the Asphaltene–Resin ratio and the Oliensis Spot Test. For oils with low asphaltene content where most stability tests fail, live oil depressurization is proposed as the test for predicting the stability of asphaltenes. 相似文献
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介绍天荒坪抽水蓄能电站上库沥青混凝土防渗护面工程中水工沥青的选择以及其在沥青混凝土配合比设计、沥青混凝土试摊铺、沥青混凝土施工及质量控制等方面的应用情况。 相似文献
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高油价下中国道路石油沥青市场形势及展望 总被引:2,自引:0,他引:2
通过分析近几年来我国公路建设、道路石油沥青消费、资源供应状况及国际原油价格变化趋势,指出未来沥青市场的发展趋势、高油价环境下存在的问题和应该采取的对策. 相似文献