Evaluation of rheological characteristics of asphalt modified with waste engine oil (WEO)

The waste engine oil (WEO) on the rheological characteristics of asphalt were studied. Two types of asphalt binders and five WEO contents (2%, 4%, 6%, 8%, and 10% wt. %) were selected to prepare WEO modified asphalt samples. Results indicated that both WEO modified asphalt had lower elastic portion, thermal susceptibility, Zero shear viscosity (ZSV), and rutting resistance, but had higher fatigue resistance and temperature sensitivity. Moreover, the effect of waste engine oil on pure asphalt is more significant than SBS modified asphalt.     

Effect of heating rate and additives (MgO and Al2O3) on a diesel like-fuel issued from waste engine oil pyrolysis

Pyrolysis experiments were conducted at atmospheric pressure in a batch reactor ranging from room temperature until 420?°C. The suitable heating rate was studied by keeping constant the reaction temperature at several levels (300, 320, 340, 360, 380 and 400?°C) for 60?min. by application the best heating program; MgO and Al₂O₃ additives are examined at various proportions (1, 2, 3, 4 and 5% by weight). It has been shown that the addition of MgO (1-2% by wt.) leads to a supplemental improvements in the DLF quality where the properties are the closet to those of conventional diesel fuel.     

废弃PE/EVA/沥青共混作铺路材料

以废戏ＰＥ～ＥＶＡ为改必睡沥青进行改性。结果表明：ＥＶＡ能有铲地改善废弃ＰＥ与沥青的相容性。当ＥＶＡ用量为８％，ＰＥ用量为４％～１２％时，三元共混体系的综合性能最好，可用作理想的铺路材料。     

废胶粉改性沥青混合料的应用实践

废旧轮胎胶粉改性沥青在安徽省尚处于试验研究阶段,并无相应规范指导设计与施工,通过总结实体工程的原材料制备、配合比设计、混合料施工以及检测等工序,为推广应用废旧轮胎胶粉改性沥青积累经验。     

改性沥青胶结料性能试验研究

采用目前较为常用的四种改性沥青胶结料：橡胶沥青、纤维改性沥青、SBS改性沥青和TPS改性沥青,通过沥青胶结料的主要性能试验对四种改性沥青胶结料及基质沥青的针入度、软化点、延度、粘度、中温疲劳性能和低温抗裂性能等主要性能进行比较与分析,为实际工程选取改性沥青胶结料提供参考。     

Evaluating the rheological effect of asphalt binder modification using soybean oil

Brazil is a highlight in the ranking of maize cooking oil production, which after consumption generates a significant amount of waste that the improper disposal of it, which could seriously affect the sewage pipes, groundwater, and soil. This research study the incorporation of 1%, 2%, and 3% of soybean (new and waste) in asphalt binder. The samples were analyzed by FTIR and frequency sweep tests. The results indicate that the optimum oil content is in the range of 1–2%, regardless of being new or residual. In the temperature sweep, it was found that the asphalt binder 55/75-E showed a smaller phase angle in all mixtures compared to the asphalt binder 50/70, thus having a better elastic recovery.     

道路沥青及SBS改性沥青的紫外老化研究

采用紫外辐射试验对道路沥青和SBS改性沥青进行加速老化试验研究.利用老化前后的软化点、针八度、延度和四组分变化。分析了道路沥青的紫外线老化机理。结果表明:随紫外线老化时间的延长,道路沥青和SBS改性沥青软化点呈上升趋势、针入度和延度呈降低变化趋势,其中又以延度变化最为明显。经紫外线老化后道路沥青和SBS改性沥青的四组分也有变化,其中沥青质略微上升、芳香分略微降低,而饱和分和胶质变化不大。     

The rheological behavior of rejuvenated SBS modified asphalt incorporating oil slurry and tri-epoxide

The viscous-elastic behavior, noise reduction and viscosity-temperature susceptibility of aged SBS modified asphalt (SBSMA) incorporated with fluid catalytic cracking slurry (FCC) and Trimethylolpropane triglycidyl ether (TMPGE) were investigated. The results indicate that the viscous-elastic temperature of rejuvenated binder will shift to a lower temperature due to the asphaltic composition adjustment and the agglomerate dispersion of the rejuvenators on aged binder; the viscous loss of binders relies upon their irreversible deformation; the rejuvenated binder makes contributions on reducing the vibration noise in comparison with aged one; the rejuvenated binder has a low viscosity that suitable for processing and pumping, and exhibits a weakening viscous-temperature susceptibility.     

乳化SBS改性沥青和SBR改性乳化沥青对比试验

SBR改性乳化沥青容易生产,低温性能好,是目前公路工程中常用的改性乳化沥青；而乳化SBS改性沥青的高温性能好,更适应炎热地区使用。在实验基础上,对比两种乳化沥青的生产工艺、性能及造价,乳化SBS改性沥青具有良好的推广应用前景。     

SBS改性无卤阻燃沥青的研制

以辽河AH-90沥青为基质沥青,苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）为改性剂,聚磷酸铵、季戊四醇、聚二甲基硅氧烷、Mg（OH）2、Al（OH）,按质量比2：3：2：1：1配制成复合阻燃剂,并采用LKJ—II型沥青调和剂,制备出SBS改性无卤阻燃沥青。性能评价结果表明,所制备SBS改性阻燃沥青的主要理化性质符合JTGF40-2004标准的要求;在复合阻燃剂加入量（占基质沥青的质量分数）为15％时,其氧指数为31．5％,烟密度为37．44,烟气毒性等级达到ZA1。     

橡胶粉的溶解度对改性沥青性质的影响

通过橡胶粉溶解度对橡胶粉改性沥青的传统指标性质研究，得出，随着溶解度的增加，60℃软化点降低和针入度增加，15℃延度降低；但用延展性评价橡胶粉改性沥青的延展性具有一定的局限性；溶解度增加有利于沥青与橡胶粉之间的相容性，但橡胶粉改性沥青体系的稳定性则与橡胶粉改性沥青的改性机理密切相关。     

The effects of additives on anti-wear properties of lubricating grease formulated from waste engine oil

The goal of this study was to study the anti-wear properties of grease formulated from waste engine oil (WEO) when additives are added. There were two types of grease formulated namely sodium and fumed silica (FS) greases. The greases were formulated using a weight percentage ratio with and without the addition of additives before the attributes of consistency, FTIR (Fourier transform infrared spectroscopy), and anti-wear analysis were conducted. Results showed that the addition of additives did not affect the properties of the formulated grease except for that of sodium grease as demonstrated by the FTIR result. Sodium grease produced a spectrum with a peak in the region < 600 cm^?1 when analyzed using FTIR. The corrosiveness of the grease toward the copper strip was also low, as determined by class 1 corrosiveness. The addition of additives resulted in no improvement in the anti-wear properties of the grease as the coefficient of friction (COF) was low for the grease without additives than for the grease with additives. However, the addition of additives can reduce the wear scar diameter of the greases. Based on the findings of this investigation, it was found that the addition of additives did not alter the properties of the greases or improve the anti-wear properties of the greases except for the wear scar diameter.     

Viscoelastic fatigue resistance of asphalt binders modified with crumb rubber and styrene butadiene polymer

In the present research study, the fatigue behavior of modified asphalt with crumb rubber (CR) and styrene-butadiene-styrene (SBS) are investigated. Each of these additives was mixed with a 85–100 neat bitumen at two different dosages. The time sweep test was used to investigate the viscoelastic fatigue properties of asphalt binders in terms of energy dissipation. Linear amplitude sweep tests were conducted to study the fatigue life of asphalt binders under varying loads based on the concepts of viscoelastic continuum damage mechanics. Results showed that adding CR and SBS can enhance the fatigue resistance of modified asphalts based on the energy approach and viscoelastic continuum damage analysis.     

生物燃料的发展及其对发动机油性能的影响

介绍了近年来全球生物燃料的发展,统计了近年来燃料乙醇和生物柴油产量,并预测了今后生物燃料的发展趋势.利用GFC氧化试验、TEOST MHT-4和HTCBT等实验室模拟试验和Caterpillar IN、Mack T-12发动机试验及实际行车试验考察了生物燃料对发动机油性能产生的各种影响,同时介绍了国际主要OEM对生物燃料所持的立场与态度.     

Investigate the physical and rheological properties of asphalt binders modified with barium sulfate nanoparticles

Abstract

The aim of this study is to investigate the physical and rheological properties of modified asphalt binders with barium sulfate (BaSO₄) nanoparticles. The penetration grade test and the softening point test on the controlled and modified asphalt binders showed that the presence of nanoparticles improved the physical properties of asphalt binders. Dynamic shear rheometer (DSR) test was performed on the main and modified asphalt binders in unaged and short-term aged modes. The asphalt binders containing 2% of nanoparticles in each of the unaged and short-term aged modes have the maximum value of rutting parameter at all temperatures.     

FCC油浆糠醛抽出油改善胶粉改性沥青性能的研究

FCC油浆糠醛抽出油富含芳香组分,是良好的道路沥青调合分。用FCC油浆糠醛抽出油溶胀预处理胶粉制备改性沥青,考察了胶粉含量和胶油比双因素对改性沥青性能的影响,同时使用扫描电子显微镜和荧光显微镜对胶粉和改性沥青的微观形态进行分析。研究结果表明,使用FCC油浆糠醛抽出油溶胀预处理胶粉可制备出性能良好的改性沥青。尤其是随着胶粉含量的增加,沥青的软化点和低温延度明显得到了改善。当胶粉质量分数为25％,胶油比控制在4～7时改性沥青的基本性能和老化性能良好,热储存稳定性最佳。     

胶乳改性乳化沥青性能试验研究

实验室内通过添加不能掺量的SBS胶乳和SBR胶乳分别制成改性乳化沥青。分别考察了筛上剩余量、恩格拉粘度、储存稳定性以及残留物的软化点、延度等几项主要指标随胶乳掺量变化的情况。SBS胶乳和SBR胶乳在对乳化沥青高低温性能的改善上各有侧重,建议在对高温性能要求较为严苛的地区使用SBS胶乳改性乳化沥青,而在对低温性能要求较为严苛的地区使用SBR胶乳改性乳化沥青。     

SC汽油机油复合添加剂的开发及应用

介绍了一种新开发的SC汽油机油复合剂,以3.8%的添加量就可生产30SC、40SC汽油机油。该复合剂的突出特点是生产成本低,所需原料易得,经济效益显著。     

改性沥青抗变形能力研究

以测力延度（温度为5℃,拉速为5 cm/min）及15℃的弹性恢复对基质沥青及其不同SBS加入量的改性沥青进行抗变形能力的评价,通过对测力延度曲线的分析,探索基质沥青及SBS改性沥青拉伸过程中的规律,研究改性沥青抗变形能力。     

Effect of thermochromic materials on physical and aging properties of SBS modified asphalt

Abstract

The effects of different types (red, black and blue color) and content (2% and 4%) of thermochromic powders on aging properties of styrene-butadiene-styrene copolymer (SBS) modified asphalt were investigated. Physical properties of the binders (ductility, penetration, viscosity and softening point) were tested before and after thermal-oxidative and ultraviolet radiation aging. The results showed thermochromic powders improved the deformability and weakened the high-temperature performance of SBS modified asphalt to some extent. Thermochromic powders could obviously improve the anti-aging properties of SBS modified asphalt. In addition, SBS modified asphalt with 2% thermochromic materials showed the best aging resistance under all aging modes.