發(fā)布時間：2018-01-16 06:47

  本文關(guān)鍵詞：雙螺桿擠出機(jī)制備脫硫橡膠及脫硫橡膠改性瀝青的性能和機(jī)理研究　出處：《北京化工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 雙螺桿擠出機(jī) 廢膠粉 脫硫橡膠 改性瀝青

【摘要】：我國經(jīng)濟(jì)發(fā)展迅速,對道路交通的負(fù)擔(dān)越來越重,同時汽車產(chǎn)業(yè)的發(fā)達(dá)造成了大量廢舊輪胎難以處理,也給環(huán)境保護(hù)造成巨大壓力。近年來廢膠粉改性瀝青在道路建設(shè)方面表現(xiàn)出優(yōu)異的性能,為我國公路建設(shè)質(zhì)量的提高有重要作用,同時也為廢舊輪胎的處理提供了新的思路,但是橡膠瀝青本身仍具有很多缺陷和局限性。本文針對廢膠粉改性瀝青本身的問題及其原因,改用脫硫橡膠制備改性瀝青。采用中膠橡膠資源再生有限公司生產(chǎn)的20目和30目廢膠粉,通過雙螺桿擠出機(jī)制備脫硫橡膠,對脫硫橡膠進(jìn)行溶膠含量測試,相對分子量測試,紅外光譜測試等一系列表征后,探索擠出工藝及配方對橡膠脫硫的影響,確定其中具體樣品的溶膠含量。選用中海油濱州煉油廠生產(chǎn)的AH-70瀝青,使用實驗室濕法工藝制備脫硫橡膠改性瀝青。測試了脫硫橡膠改性瀝青的三大指標(biāo),布氏旋轉(zhuǎn)黏度以及存儲穩(wěn)定性,通過熒光顯微鏡觀測瀝青內(nèi)部的微觀結(jié)構(gòu),利用橡膠加工分析儀(RPA)分析瀝青中橡膠的分散性。通過對實驗數(shù)據(jù)的分析以及與傳統(tǒng)廢膠粉改性瀝青的性能對比,探索脫硫橡膠改性瀝青的性能優(yōu)勢以及與橡膠溶膠含量的關(guān)系。所得主要結(jié)論如下：(1)雙螺桿擠出機(jī)溫度升高,轉(zhuǎn)速降低能夠提高橡膠脫硫效果,主反應(yīng)區(qū)適宜溫度為280℃,可以通過改變轉(zhuǎn)速控制橡膠脫硫程度。脫硫劑和松焦油用量變化也會影響脫硫效果,脫硫劑最佳用量為2%,松焦油最佳用量為4%。所用膠粉粒徑越細(xì),脫硫效果越好。(2)脫硫橡膠改性瀝青中脫硫橡膠份數(shù)添加份數(shù)可達(dá)30%。在改性時使用溶膠含量較高的脫硫橡膠,可以得到黏度更低的瀝青,存儲穩(wěn)定性也會明顯改善,但是高溫穩(wěn)定性變差。脫硫后橡膠在瀝青中的分散性明顯提高。(3)脫硫橡膠與普通廢膠粉共同使用,可以相互彌補(bǔ)二者在改性瀝青上的缺陷和不足,使改性瀝青具有二者共同的優(yōu)勢。
[Abstract]:China's rapid economic development, the burden of road traffic is becoming more and more heavy, and the development of automobile industry has caused a large number of waste tires difficult to deal with. In recent years, asphalt modified by waste rubber powder has shown excellent performance in road construction, which plays an important role in improving the quality of highway construction in China. At the same time, it also provides a new idea for the treatment of waste tires, but rubber asphalt itself still has many defects and limitations. This paper aims at the problems and causes of waste rubber powder modified asphalt itself. Desulphurized rubber was used to prepare modified asphalt. The desulfurized rubber was prepared by twin-screw extruder using 20 mesh and 30 mesh waste rubber powder produced by medium rubber resource regeneration co., Ltd. The sol content of desulfurized rubber was tested. After a series of characterization, such as relative molecular weight test, infrared spectrum test and so on, the influence of extrusion technology and formula on rubber desulfurization was explored. The sol content of the specific samples was determined. The AH-70 asphalt produced by CNOOC Binzhou Refinery was selected. The desulfurized rubber modified asphalt was prepared by wet process in laboratory. Three indexes, Brinell rotation viscosity and storage stability, were tested, and the microstructure of the asphalt was observed by fluorescence microscope. The dispersion of rubber in asphalt was analyzed by rubber processing analyzer (RPA). Through the analysis of experimental data and performance comparison with traditional asphalt modified with waste rubber powder. To explore the performance advantages of desulfurized rubber modified asphalt and its relationship with rubber sol content. The main conclusions are as follows: 1) the increase of temperature and the decrease of rotating speed of twin-screw extruder can improve the desulfurization effect of rubber. The optimum temperature in the main reaction zone is 280 鈩，

本文編號：1431998