本文選題：瀝青混合料 + 常溫再生��； 參考：《華南理工大學》2014年碩士論文

【摘要】：近年來，我國的公路建設迅速發(fā)展，截至2013年底，全國高速公路通車總里程已達104468公里。在我國的道路路面結(jié)構(gòu)中，以瀝青路面最多。瀝青的壽命如果按照15至20年的設計年限計算,則在1990年之后建成通車的高速公路已進入大面積改造維修期。由舊瀝青路面銑刨得到的廢舊瀝青混合料（RAP）的廢棄量逐年增多，如將這些廢棄料舍棄，則會對環(huán)境造成很大污染，且由于傳統(tǒng)的改造重建舊路面方法需消耗大量限量資源，占用巨大建設資金，因此路面再生這一資源節(jié)約環(huán)境友好型技術(shù)迅速發(fā)展起來。 由于熱再生能耗大，而現(xiàn)有冷再生技術(shù)只將RAP當“黑色集料”，其中舊瀝青難以得到充分利用，造成瀝青資源浪費。為了提高RAP中舊瀝青利用率，，改善冷再生混合料路用性能，研發(fā)了一種常溫溶解乳化再生廢舊瀝青混合料技術(shù)。 通過室內(nèi)試驗研究，分析了此種常溫溶解乳化再生方法的機理，確定了此種再生方法所需各種添加劑的種類和劑量，之后通過試驗和經(jīng)驗方法給出了混合料的拌合時間及試件的成型和養(yǎng)生方式。并對此種再生方式四種不同配比混合料的基本性能進行了試驗，包括空隙率、確定劈裂抗拉強度的劈裂試驗及浸水劈裂試驗、確定殘留強度比的凍融劈裂試驗，試驗結(jié)果表明，4種再生混合料路用性能均滿足《公路瀝青路面再生技術(shù)規(guī)范》（JTG F41-2008）中用作下面層的再生混合料的技術(shù)要求，即空隙率均小于14%，劈裂強度均大于0.5MPa，TSR均大于70%。 另外，將初次再生并老化處理的混合料進行重復再生，通過浸水劈裂試驗、劈裂疲勞試驗和APA試驗比較了老化后的瀝青混合料經(jīng)初次再生和重復再生之后的劈裂強度和疲勞性能。結(jié)果表明，4種重復再生混合料的浸水劈裂強度比初次再生混合料均有所降低，但仍大于0.5MPa證明常溫溶解乳化再生的混合料可以重復再生。重復再生混合料疲勞性能與初次再生混合料相比也有所損失，其中，添加乳化劑和改性劑的再生混合料的疲勞性能損失率較低，表明改性劑和乳化劑的共同作用對二次再生混合料疲勞性能貢獻較大。
[Abstract]:In recent years, highway construction in China has developed rapidly. By the end of 2013, the total mileage of highway opened to traffic has reached 104468 km. Asphalt pavement is the most common pavement in our country. If the life of asphalt is calculated according to the design life of 15 to 20 years, the expressway which was built and opened after 1990 has entered the period of large area reconstruction and maintenance. The waste amount of waste asphalt mixture (rap) obtained from milling and planing of old asphalt pavement increases year by year. If these waste materials are discarded, it will cause great pollution to the environment, and because the traditional methods of rebuilding and rebuilding the old road surface need a large amount of limited resources, It takes up huge construction funds, so the resource-saving and environment-friendly technology of road surface regeneration is developing rapidly. Because of the large energy consumption of thermal regeneration, the existing cold regeneration technology only uses RAP as "black aggregate", among which the old asphalt is difficult to be fully utilized, resulting in the waste of asphalt resources. In order to improve the utilization ratio of used asphalt in RAP and improve the road performance of cold recycled mixture, a new technology of dissolved emulsified recycled waste asphalt mixture at room temperature was developed. Through laboratory experiments, the mechanism of this regeneration method was analyzed, and the kinds and doses of various additives needed for this regeneration method were determined. After that, the mixing time of the mixture and the molding and health maintenance of the sample are given through the experiment and experience method. The basic properties of four kinds of mixtures with different proportions were tested, including void ratio, splitting test for determining splitting tensile strength and immersion splitting test, freezing and thawing splitting test for determining residual strength ratio. The test results show that the road performance of the four recycled mixtures can meet the technical requirements of JTG F41-2008), that is, the void ratio is less than 14%, and the splitting strength is more than 0.5 MPA / TSR > 70%. In addition, the mixture that was first regenerated and aged was recycled repeatedly, and the experiment was carried out through water immersion splitting test. Splitting fatigue test and APA test were used to compare the splitting strength and fatigue performance of the aged asphalt mixture after primary regeneration and repeated regeneration. The results show that the water immersion splitting strength of the four kinds of recycled mixture is lower than that of the first recycled mixture, but it is still larger than that of 0.5MPa, which proves that the mixture can be regenerated repeatedly by dissolution emulsification at room temperature. The fatigue performance of recycled mixture is also lower than that of primary recycled mixture, and the fatigue loss rate of recycled mixture with emulsifier and modifier is lower than that of primary recycled mixture. The results show that the combined action of modifier and emulsifier contributes greatly to the fatigue performance of secondary recycled mixture.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U414

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