本文關(guān)鍵詞：夏熱冬寒地區(qū)納米改性瀝青研究　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 無機納米粒子 聚合物改性劑 納米復(fù)合改性瀝青 表面修飾 性能 共混機理

【摘要】：延志吳高速公路地處于延安市，所經(jīng)地區(qū)為夏熱冬寒地帶，年平均溫度9.7℃，極端最高氣溫39.7℃，極端最低氣溫-28.5℃，非常容易使路面產(chǎn)生車轍與開裂病害，對于瀝青混合料的高溫和低溫性能均提出了很高的要求。傳統(tǒng)的瀝青材料很難同時滿足抵抗車轍和開裂的性能，尤其是對于夏熱冬寒地區(qū)更為突出。因此，本文采用納米材料/聚合物復(fù)合改性瀝青來同時提高瀝青高溫抵抗車轍，低溫抵抗縮裂的能力，使之適用于高、低溫環(huán)境下的路面地區(qū)，具有非常重要的實際意義。 首先，本文初選納米A、納米B、納米C、納米D、納米E五種納米材料，采用適宜的活化劑對其表面進行活化改性，通過親油化度試驗及紅外光譜研究活化劑對不同無機納米粒子材料表面活化改善效果的影響。親油化度測試納米粒子表面修飾前后的結(jié)果表明，每種納米粒子表面的親油化度程度都得到提高；紅外光譜分析表明，活化劑已通過化學(xué)鍵接到了無機納米粒子的表面，，證明活化劑對納米材料表面改性是有效可行的。 其次，采用攪拌+高速剪切的方法分別制備納米改性瀝青與聚合物改性瀝青，通過常規(guī)指標對納米材料及聚合物進行比選，篩選出性能較優(yōu)的改性劑。以同樣的制備工藝，采用三因素正交試驗及兩因素互補試驗方案制備納米/聚合物復(fù)合改性瀝青，分別用極差分析法和對比法篩選出兩種方案的各種改性劑最佳組合。對每種組合采用性能、造價綜合對比分析，比選出最佳的納米復(fù)合改性瀝青，有3%A+0.5%C+3.7%SBS、5%B+1%C+3%SBR、3%A+4%SBR、5%B+4%SBR、5%A+4.2%SBS。 然后，對比選出的納米復(fù)合改性瀝青進行老化性能、DSR、BBR、離析試驗研究。在老化性能試驗中，采用質(zhì)量損失、針入度比、延度對納米復(fù)合改性瀝青的抗老化性能進行評價。DSR試驗通過復(fù)變剪切模量G*、相位角δ和車轍因子G*/sinδ評價納米復(fù)合改性瀝青的高溫性能； BBR試驗采用彎曲蠕變勁度模量S和蠕變曲線的斜率m兩個參數(shù)來評價納米復(fù)合改性瀝青低溫抗裂性能。從而終選出適合夏熱冬寒地區(qū)的三種納米復(fù)合改性瀝青，為3%A+0.5%C+3.7%SBS、5%B+4%SBR、5%A+4.2%SBS，研究表明無論抗老化性能還是高、低溫性能都得到了顯著提高。同時對終選的納米復(fù)合改性瀝青進行離析試驗分析，表明經(jīng)過表面活化的納米材料的加入可以明顯改善復(fù)合改性瀝青的相容性。 最后，通過掃描電鏡和熒光顯微鏡直接觀測終選的納米復(fù)合改性瀝青中納米和聚合物改性材料在瀝青中的分布狀態(tài)以及與瀝青兩者間的界面結(jié)合情況，用紅外光譜儀分析納米復(fù)合改性瀝青微觀改性機理。同時研究納米材料和聚合物加入到基質(zhì)瀝青中的相互作用機理，進而來探討納米材料/聚合物復(fù)合改性瀝青的技術(shù)性能，以期望達到良好的改性效果，促進納米材料改性瀝青的發(fā)展與應(yīng)用。
[Abstract]:Yan Zhi Wu highway in Yanan City, the area of hot summer and cold winter zone, the annual average temperature of 9.7 degrees Celsius, the extreme maximum temperature of 39.7 degrees, the extreme minimum temperature -28.5, very easy to produce rutting and cracking of pavement, the asphalt mixture at high temperature and low temperature performance requires a high pitch. The traditional material is difficult to meet the performance of resistance to rutting and cracking, especially in hot summer and cold winter area is more prominent. Therefore, this paper adopts nano material / polymer composite modified asphalt to improve asphalt high temperature resistance rutting, low temperature crack resistance ability, so as to be suitable for the high surface area under low temperature environment and it has very important practical significance.
First, the primary nano A, nano B, nano C, nano D, nano E five nano materials, using appropriate activating agent on the surface of the activated modification by Pro on the degree of oil test and the IR activation effect on the activation effect of different inorganic nanoparticles surface materials. The degree of oil before and after Pro the test results show that the nanoparticles surface modified nanoparticles, each lipophilic degree has been improved; infrared spectral analysis showed that the activator has by chemical bonding to the surface of inorganic nanoparticles, proof of activating agent on the surface modification of nano materials is feasible and effective.
Secondly, respectively preparing nanometer modified asphalt and polymer modified asphalt with high shear mixing method + by conventional, index of nano materials and polymer were compared and screened modifier with better performance. In the preparation process of the same, complementary test scheme for preparing nano / polymer composite modified asphalt used the three orthogonal factors and two factors were selected two kinds of modifier, the best combination scheme by range analysis method and comparison method. The performance of each combination, comprehensive comparison and analysis of cost, select the best ratio of nano composite modified asphalt, 3%A+0.5%C+3.7%SBS, 5%B+1%C+3%SBR, 3%A+4%SBR, 5%B+4%SBR, 5%A+4.2%SBS.
Then, selected nano composite modified asphalt aging performance, DSR, BBR, experimental study on segregation. In aging performance test, the mass loss, penetration ratio, extension evaluation.DSR test using complex shear modulus G* anti ageing properties of nano composite modified asphalt, phase angle and rutting factor G*/sin delta evaluation of nano composite modified asphalt high temperature performance; BBR test using the bending creep stiffness modulus S and the creep curve slope of the m two parameters to evaluate the low temperature performance of nano composite modified asphalt. Thus eventually selected for the three kinds of nano composite modified asphalt, hot summer and cold winter areas of 3%A+0.5%C+3.7%SBS, 5%B+4%SBR. 5%A+4.2%SBS research shows that both anti aging or high performance, low temperature performance has been significantly improved. At the same time, the final selection of the nano composite modified asphalt segregation test analysis showed that after surface activation The compatibility of composite modified bitumen can be obviously improved by the addition of nanomaterials.
Finally, direct observation of the final selection of nanocomposite distribution in modified asphalt and polymer modified nano materials in asphalt and asphalt combined with the interface by scanning electron microscopy and fluorescence microscopy, the micro nano composite modified asphalt modification mechanism is analyzed by IR spectrometer. At the same time the research of nano materials and polymer is added to each other the mechanism of the modified asphalt, and then discusses the technical performance of nano material / polymer composite modified asphalt, in order to get good modification effect, promote the development and application of nanometer modified asphalt.

【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414

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