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煤沥青与石油沥青共混作筑路材料 总被引:11,自引:0,他引:11
介绍了国外煤沥青与石油沥青共混作筑路材料的发展概况、混合沥青胶体结构模型以及国产煤沥青共混初步试验结果。对两个国产石油沥青样品与一个煤沥青样品共混得到的混合沥青性质的初步试验表明,混合沥青对碎石特别是酸性碎石的粘附力高于原石油沥青。与石油沥青相比,混合沥青的抗高温变形能力强,并可降低生产沥青碎石混合料的操作温度。所得混合沥青样品多项指标接近德国和波兰同类产品的水平。 相似文献
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两种不同原料中间相沥青分子结构的研究 总被引:1,自引:0,他引:1
采用偏光显微镜、族组成分析、红外光谱(FI-IR)、核磁共振(NMR)等研究手段,对两种不同中间相沥青FCC-MP(石油渣油热缩聚中间相沥青)和AR-MP(萘系催化合成中间相沥青)的组成结构进行研究,结果表明:100%中间相沥青在稠环芳烃区都有3个平行的红外特征峰(870,810,750 cm-1),且3个吸收峰的强度相近;FI-IR和NMR测试都表明,不同中间相沥青的支链比例差别很大,AR-MP分子上含有较多的甲基支链和环烷结构,非芳香碳占总碳原子的21%,FCC-MP分子上的支链和环烷比例较少,非芳香碳占总碳原子的14%,分子结构中支链和环烷结构有利于形成大融并体,降低软化点和熔融态黏度;根据1H-NMR和13C-NMR谱图计算出两种沥青吡啶可溶物(PS)的H、C分布数据和分子结构参数,并推导出两种中间相沥青PS组分的平均分子结构模型. 相似文献
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塔河减渣(THVR)直接生产合格道路沥青存在技术瓶颈。本文用调和工艺,以塔河减渣为基质沥青,在荆门油浆、荆门抽出油及春风减渣3种不同种类的调和组分中优选出新疆春风减渣(CFVR)为优质软组分,对THVR改质制备60#道路沥青的效果进行考察,建立基于正庚烷沥青质含量的沥青热老化动力学模型,并对改质前后沥青四组分进行平均分子结构表征。结果表明:与THVR相比,CFVR热老化性能及低温性能较好,但感温性能较差,添加40% CFVR的调和沥青TH-CF-40可满足道路石油沥青60#标准。TH-CF-40老化速率较小,老化反应活化能Ea为102.00kJ/mol,较THVR为高;其饱和分链长为14.44,较THVR短;芳香分、胶质及沥青质芳碳率fA分别为0.29、0.42、0.46,芳环与环烷环之比RA/RN分别为1.24、2.65、2.93,平均侧链长度L分别为6.78、6.09、5.40,均向CFVR趋近,从而使得调和沥青的抗热老化性能及低温延展性有所提高。采用该工艺有助于减少塔河减渣焦化处理量,提高塔河减渣的利用水平,研究结果为拓展春风优质沥青的更高效利用提供理论指导,具有学术意义和应用前景。 相似文献
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胶质沥青质及石油中的其他重质组分的沉淀会对石油生产与加工造成诸多损害.本文对胶质沥青质的化学结构、聚集和沉积机理、沉淀点和实验方法,吸附的机理和模型等问题的研究进展进行了综述. 相似文献
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研究了SBS对石油沥青的改性及多胺活性剂aa对沥青的抗剥落效力.用水煮法对水浸石料颗粒与干燥石料颗粒与基质沥青或改性沥青的粘附性能分别进行了考查,SBS改性沥青材料添加0.3?后裹覆干燥石料颗粒,耐水煮时间延长 9 min以上;添加0.3?的基质沥青材料裹覆浸水石料颗粒的耐水煮时间与不添加aa的基质沥青材料裹覆干燥石料颗粒的耐水煮时间相同. 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献