共查询到19条相似文献,搜索用时 31 毫秒
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张山钟 《合成材料老化与应用》2019,48(4)
为掌握温拌剂类型和橡胶粉细度对温拌橡胶沥青性能的影响,制备不同类型温拌橡胶沥青,通过布氏旋转粘度、软化点和延度等试验对其粘温性能、高温性能和低温性能分别进行研究。结果表明:橡胶粉细度和温拌剂类型对温拌橡胶沥青粘度有显著影响,且橡胶粉细度影响程度更大,其中橡胶粉细度增加时橡胶沥青粘度提高; ZYF、Sasobit和Evotherm对橡胶沥青的降粘效果依次变差,同时橡胶粉细度增加时三者降粘效果均降低; Sasobit能有效提高橡胶沥青高温性能,Evotherm和ZYF则对其高温性能有不利影响,而三种温拌剂对低温性能的影响与高温性能正好相反;橡胶粉细度增加时其制备的沥青高温性能和低温性能均提高。 相似文献
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为了研究自主研发的新型HPD温拌剂对高粘沥青性能的作用效果,考察了HPD掺量为0%、1.8%、2.0%、2.2%对高粘改性沥青的高低温性能、粘温特性、破坏温度及其微观结构的影响,并以掺量为2.0%的Sasobit温拌高粘沥青作为对比.实验结果表明:HPD温拌剂加入后可以提高沥青的高温特性,且效果要好于同掺量的Sasob... 相似文献
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为实现公路老化沥青的高效回收利用,研制了一种新型自制温拌再生剂(WR),通过对温拌再生沥青进行常规物理性能和MSCR试验,并与两种工业再生剂进行对比分析,探究WR的最佳配比、再生效果及最优掺量;通过FTIR和SEM分析探究WR对老化沥青的再生机理。结果表明,WR成分质量分数的最佳比例为:原油:表面活性剂:增塑剂:抗老化剂=80.0:9.5:8.0:2.5;WR比工业再生剂具有更加优异的再生性能,但WR含量过高会增加成本和降低再生沥青的耐车辙性能,WR的最优含量为7%。FTIR和SEM测试结果表明,WR能通过物理作用显著地补充老化沥青中的挥发成分,使再生沥青组分比例和微观结构恢复至原沥青相似水平。上述研究成果能为老化沥青的经济再生提供更加合理的途径。 相似文献
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秦雯;杨稼诏;马峰;杨宇峰 《应用化工》2025,(3):624-629
高寒地区普通沥青路面更易开裂,并且在沥青路面施工时存在温度易散失,施工质量波动大的问题。高黏沥青有助于改善路面的低温抗裂性能,但对施工温度要求高。将温拌技术应用于高黏沥青路面中,可降低施工温度,一定程度减少环境温度的不利影响。借助响应曲面法进行高黏沥青的复配和温拌高黏改性沥青的制备,分析评价了温拌剂对沥青性能的影响和温拌效果,并借助傅里叶红外光谱试验解析了温拌剂的作用机理。结果表明,(1)基于响应曲面法优选复配的高黏沥青高低温和抗疲劳性能优异。(2)相比于L型(LKW)温拌剂,S型(SMC)温拌剂可以显著降低软化点、动力黏度和布氏黏度,提升针入度和延度,对高黏改性沥青的降黏效果更好。 相似文献
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对生物质温拌再生沥青的流变性能和疲劳性能进行研究,选用70#基质沥青以3.5%,5.5%,7.5%,9.5%,11.5%掺量的生物质温拌再生剂WL-3对室内模拟老化沥青进行再生,采用动态剪切流变仪(DSR)对生物质温拌再生沥青的相位角、复数模量、车辙因子等高温流变性能指标进行研究;通过线性振幅扫描(LAS)对生物质温拌再生沥青、70#基质沥青和老化沥青的疲劳性能进行研究。结果表明,生物质温拌再生剂WL-3的加入降低了老化沥青的车辙因子、疲劳因子和应变恢复率(R),不可恢复蠕变柔量(Jnr)和疲劳寿命增加,提高了老化沥青的应力敏感性,流变特性得到较好恢复。 相似文献
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温拌沥青在使用的过程中可以节省20%~30%的燃料,而且也可以减少污染气体的排放,温拌沥青在使用的过程中拌和温度和摊铺温度都比热拌沥青有所降低,非常适合在寒冷地区的使用,可以缩短施工的时间,延长路面的使用寿命。而作为温拌沥青的上游原材料,辽河石化沥青又有着得天独厚的优势。介绍了温拌沥青的技术特点、温拌沥青的优良性能以及辽河石化沥青的特点等。 相似文献
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磺酸盐Gemini表面活性剂因具有较高的表面活性、耐温及抗盐性好等特点而受到国内外学者的广泛关注。分别采用量高法和搅动法测定了磺酸盐Gemini表面活性剂TADS-10的润湿性能和起泡性能,采用分水时间法测定了TADS-10对液体石蜡的乳化能力。结果表明:磺酸盐Gemini表面活性剂TADS-10亲油表面的接触角随浓度的增大而减小,而亲水表面的接触角随浓度的增大而增大;在临界胶束浓度附近,TADS-10的起泡性能趋于稳定;随着温度的升高,其起泡性能增强;与传统表面活性剂相比,TADS-10具有较强的乳化性能。 相似文献
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CLA-rich soy oil (CLARSO) has been produced by linoleic acid isomerization in soy oil TAG. The objective was to determine the physicochemical properties of the novel CLARSO relative to conventional refined bleached deodorized soy oil (RBDSO). Iodine value decreased in CLARSO samples despite unsaturation being unchanged, probably because conjugated double bonds in triacylglycerol (TAG) of CLARSO impede the complete addition of iodine. Thermal analysis by differential scanning calorimetry showed the melting point temperature increased with the increase in the CLARSO CLA concentration, and melting point broadening occurred in CLA contained samples. Dynamic viscosity of CLARSO conducted from 4 to 44 °C increased with the increase in CLA concentration, relative to RBDSO. Greatest viscosity differences occurred at the lower temperatures. Refractive indices and density were not greatly affected. The change in physical properties was attributed to the increased intermolecular hydrophobic interaction force due to conjugated double bonds and trans,trans isomers, relative to RBDSO. This may provide hard fat characteristics that may be useful for use in producing margarine or shortenings. Furthermore, the higher viscosity at refrigerator temperatures may be useful in salad oil and refrigerated sauces to enable suspension of particles and maintain a rich, thicker texture. 相似文献
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CAOFeng LONGShigang WUXingrong SUNJialin HONGYanruo 《中国耐火材料》2003,12(4):11-15
The aim of this experimental work was to investigate the theological and adhesive performance of gunning mix suspensions.The results of rheological tests indicate that:the rheological curve of gunning mix bonded by high-alumina cement(HACG) is Bingham type;the rheological curve of low cement gunning mix(LCG) bonded by microsilica is characterized by pseudo-plasticity fluid with yielding stress;and the rheological property of low-cement gunning mix bonded by microsilica is proved to be better than that of gunning mix bonded by cement.Meanwhile as indicated by the adhesive teste;the better the rheological properties of gunning mix suspension,the better the repair effect would be. 相似文献
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Relationship Between Physicochemical Properties and Moisture Barrier Property of Confectionery Coating Fats
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Moisture migration in food causes deleterious effects on food quality such as loss of crispiness in ice cream cones, drying of chocolate with liquid centers, sugar bloom and cracking of compound/chocolate coating. The present study aimed to investigate the relationship between physicochemical properties of confectionery coating fats such as fatty acids and triacylglycerol (TAG) composition, solid fat contents, rheological and crystalline properties with their moisture barrier property. Coating fats with high content of trisaturated and desaturated TAG; and high SFC at 25 °C were found to have significant (P < 0.05) positive correlation with its moisture barrier property. These fats were able to crystallize into highly crystalline materials (high SFC) with small crystal size and dense networks. Thus, these fats were able to significantly delay moisture migration. Nevertheless, some of the highly crystalline fats also had high G′ value indicating poor mechanical properties and higher tendency of such fats to crack. In order to have good moisture barrier property, coating fats need to have sufficient solids with small crystal size and dense networks; and also low G′ value. Wafer coated with good moisture barrier fat showed less cracking during storage. 相似文献
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进行大掺量甲醇汽油研究及考核,通过计算机仿真模拟试验,优化添加剂配方组分。采用自溶合技术调配M45甲醇汽油,完成添加剂和M45甲醇汽油理化指标测试,进行M45甲醇汽油互溶性、高低温启动性等试验,进行行车试验,对M45甲醇汽油和纯汽油进行油耗和经济性的对比分析,确定添加剂和M45甲醇汽油生产工艺路线,制定企业标准。 相似文献
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水对水泥乳化沥青砂浆静态力学性能的影响 总被引:5,自引:0,他引:5
为了研究水对水泥乳化沥青砂浆(SL 砂浆)静态力学性能的影响,采用阳离子型(A1)、复合离子型(A2)和阴离子型(A3) 3 种乳化沥青制备了沥青与水泥质量比(mA/mC)为 0.3、0.5、0.7 和 0.9 的 SL 砂浆圆柱体试件,将其真空吸水饱和后经低湿和恒湿两种干燥方法获得不同饱水度,再对不同饱水度的试件进行抗压试验。结果表明:SL 砂浆的饱和体积吸水率均大于 10%,且与 mA/mC值和乳化沥青种类有关;其抗压强度和弹性模量随饱水度增加而显著降低,且抗压强度降低幅度较大,最大可达 40%以上;mA/mC值越大,力学性能降低幅度也越大。3 种乳化沥青制备的试件中,A1 试件降低幅度最大,A3 试件次之,A2 试件最小。提高 SL 砂浆抗水性的关键是增强界面结合力和减小吸水率。 相似文献
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分析了马来酸酐(MAH)不同掺量对SBS改性沥青微观结构和性能的影响。结果表明,随MAH掺量的增加,SBS改性沥青的软化点和针人度指数PI提高,但5℃延度降低。而改性沥青离析软化点差随MAH掺量增加,先减小后增大,表明相容性先改善后变差。 相似文献