【摘要】：針對目前瀝青道路使用過程中因瀝青老化導(dǎo)致各種病害的現(xiàn)狀,提出以納米ZnO作為改性劑來改善道路瀝青的抗老化性能。設(shè)計納米ZnO改性瀝青中納米ZnO的摻量范圍,進(jìn)行了基質(zhì)瀝青和納米ZnO改性瀝青一系列性能測試試驗,主要包括三大性能指標(biāo)測試、動態(tài)剪切流變性能測試(DSR)、紫外光吸收測試、分層離析試驗等,分析了改性瀝青性能變化,探究其改性機(jī)理。結(jié)果表明,摻加納米ZnO后,改性瀝青的三大性能均得到不同程度的改善,表現(xiàn)為針入度降低,軟化點(diǎn)上升,延度增大;抵抗應(yīng)力應(yīng)變能力增強(qiáng),在溫度升高時表現(xiàn)出一定的彈性恢復(fù);紫外光吸收強(qiáng)度大幅提高,是基質(zhì)瀝青吸收強(qiáng)度的幾倍;納米ZnO與瀝青相容性較好,并且確定納米ZnO最適宜摻量為瀝青質(zhì)量的3%。進(jìn)行瀝青混合料馬歇爾穩(wěn)定度試驗及浸水馬歇爾試驗,反映納米ZnO對瀝青混合料的高溫穩(wěn)定性和水穩(wěn)定性的改善作用。對基質(zhì)瀝青及納米ZnO改性瀝青進(jìn)行薄膜烘箱老化(TFOT)和室內(nèi)加速紫外老化(UV)試驗,結(jié)合三大性能指標(biāo)試驗,得出納米ZnO能夠提高瀝青抗老化性能,尤其對抗UV老化效果明顯。通過對基質(zhì)瀝青與改性瀝青UV老化前后動態(tài)剪切流變性能及紅外光譜測試,分析了納米ZnO對瀝青流變性能及官能團(tuán)的影響,探究了改性瀝青老化機(jī)理及納米ZnO在瀝青老化過程中的作用機(jī)理。結(jié)果顯示:納米ZnO能夠使瀝青在老化過程中表現(xiàn)出一定的粘性回復(fù);納米ZnO能夠有效減少瀝青老化過程中特征官能團(tuán)指數(shù)的增量,減緩瀝青老化進(jìn)程。最后,為提高納米ZnO在瀝青中的分散均勻性,制備了氧化石墨烯及納米ZnO-氧化石墨烯復(fù)合材料,進(jìn)行SEM掃描電鏡照片分析,并將復(fù)合材料引入基質(zhì)瀝青中進(jìn)行分層離析試驗。結(jié)果表明:氧化石墨烯是大量片層疊加的結(jié)構(gòu);納米ZnO能夠在氧化石墨烯片層結(jié)構(gòu)中較均勻的分散;復(fù)合材料與瀝青的相容性較好,可提高納米ZnO在改性瀝青中的分散性。
[Abstract]:In view of various diseases caused by asphalt aging in the course of asphalt use at present, nanometer ZnO is used as modifier to improve the anti-aging performance of road asphalt. A series of performance tests of matrix asphalt and nanometer ZnO modified asphalt were carried out, including three main performance indexes, dynamic shear rheological test, UV absorption test of (DSR),. The performance change of modified asphalt was analyzed and the modification mechanism was explored. The results showed that the three properties of modified asphalt were improved in varying degrees after the addition of nanometer ZnO, such as the decrease of penetration, the increase of softening point, the increase of ductility, and the enhancement of resistance to stress and strain. When the temperature increases, the absorption intensity of ultraviolet light is greatly increased, which is several times of that of the base asphalt, and the compatibility of nanometer ZnO with asphalt is better, and it is determined that the most suitable content of nanometer ZnO is 3wt% of asphalt. The Marshall stability test and immersion Marshall test of asphalt mixture reflect the effect of nanometer ZnO on the high temperature stability and water stability of asphalt mixture. Based on the results of the film oven aging (TFOT) test and the indoor accelerated UV aging (UV) test of the matrix asphalt and the nanometer ZnO modified asphalt, it is concluded that the nano-ZnO can improve the anti-aging performance of the asphalt, especially the anti-UV aging effect. The effects of nano-scale ZnO on the rheological properties and functional groups of asphalt were analyzed by means of dynamic shear rheological properties and infrared spectrum measurements before and after UV aging of matrix asphalt and modified asphalt. The aging mechanism of modified asphalt and the action mechanism of nanometer ZnO in asphalt aging process were studied. The results show that nano-scale ZnO can make asphalt show a certain viscosity recovery during aging, and nanometer ZnO can effectively reduce the increment of characteristic functional group index and slow down the aging process of asphalt. Finally, in order to improve the dispersion uniformity of nanometer ZnO in asphalt, graphene oxide and nano-ZnO- graphene oxide composites were prepared and analyzed by SEM scanning electron microscope (SEM), and the composite materials were introduced into the matrix asphalt for delamination and segregation test. The results show that graphene oxide is a superposition of a large number of lamellar structures, nanometer ZnO can be uniformly dispersed in the graphene oxide lamellar structure, and the compatibility between the composite and asphalt is better, which can improve the dispersion of nano-ZnO in 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】：2015
【分類號】：U414

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 ;應(yīng)用于高級公路的高分子改性瀝青[J];建材工業(yè)信息;2002年10期

2 李飛;周明;;改性瀝青設(shè)備技術(shù)展望[J];工程機(jī)械文摘;2003年02期

3 王元蓀;用于道路的改性瀝青材料[J];橡膠工業(yè);2003年04期

4 李景軒,孟凡軍;改性瀝青設(shè)備的發(fā)展與應(yīng)用[J];建筑機(jī)械化;2003年01期

5 張宗輝;道維施改性瀝青設(shè)備[J];建筑機(jī)械;2004年02期

6 方炬洋;改性瀝青在漳詔高速公路中的應(yīng)用[J];福建建設(shè)科技;2004年04期

7 張哲,何中科;淺談改性瀝青的生產(chǎn)[J];山西交通科技;2005年S1期

8 李玫;;橡膠-聚乙烯改性瀝青[J];橡塑資源利用;2005年06期

9 郭強(qiáng);;改性瀝青的應(yīng)用及推廣[J];科學(xué)之友(學(xué)術(shù)版);2006年01期

10 楊元明;趙冰;楊璐;;改性瀝青設(shè)備的自動控制及其實現(xiàn)[J];中國市政工程;2006年01期

相關(guān)會議論文 前10條

1 黃婉利;俞華信;羅望群;王玲;陳定利;;改性瀝青新產(chǎn)品研究開發(fā)[A];新世紀(jì) 新機(jī)遇 新挑戰(zhàn)——知識創(chuàng)新和高新技術(shù)產(chǎn)業(yè)發(fā)展（上冊）[C];2001年

2 徐希娟;原健安;;化學(xué)改性瀝青的應(yīng)用前景分析[A];中國公路學(xué)會’2001學(xué)術(shù)交流論文集[C];2001年

3 郝培文;;改性瀝青使用技術(shù)中的問題及發(fā)展趨勢[A];第五屆全國路面材料及新技術(shù)研討會論文集[C];2004年

4 楊林江;施張興;金海山;林大根;;淺談乳化改性瀝青發(fā)展方向及生產(chǎn)技術(shù)關(guān)鍵[A];第五屆全國路面材料及新技術(shù)研討會論文集[C];2004年

5 孔憲明;;改性瀝青的顯微觀測[A];建筑防水工程新技術(shù)第五屆學(xué)術(shù)年會論文集[C];1998年

6 ;塑性體改性瀝青、彈性體改性瀝青兩項新國標(biāo)實施[A];全國第十四屆防水材料技術(shù)交流大會論文集[C];2012年

7 王燕文;陳e，

本文編號：2159946