本文關(guān)鍵詞：基于廢舊橡塑高分子合金的穩(wěn)定型改性瀝青的機(jī)理研究　出處：《山東建筑大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 廢舊橡塑高分子合金改性劑 溶解度參數(shù) 紅外分析 差熱分析 原子力顯微鏡分析 粘彈特性

【摘要】：隨著交通量的不斷加大和重載車輛的不斷增多,一些瀝青路面在正式開放交通后不久就出現(xiàn)了不同程度的早期損害,這不但造成了很大的經(jīng)濟(jì)損失,也給行車舒適性和行車安全性帶來了較大隱患。此外,隨著經(jīng)濟(jì)的發(fā)展,我國每年都產(chǎn)生大量的廢舊塑料和廢舊橡膠,這給環(huán)境造成了巨大的壓力,如何能夠有效的解決這些環(huán)境問題成為一個(gè)嚴(yán)峻的課題。如果將廢舊橡膠和廢舊塑料回收后加工后加入到瀝青中來提高瀝青的使用性能,既能有效地解決廢舊輪胎及塑料帶來的污染問題,又能改善瀝青材料的路用性能,從而帶來顯著的經(jīng)濟(jì)和社會效益。 針對以上問題,本文開展了廢舊橡塑高分子合金穩(wěn)定型改性瀝青的機(jī)理研究。首先通過溶解度參數(shù)分析了廢舊塑料和廢舊橡膠的相容性,然后以廢舊塑料和廢舊橡膠為原材料,在特定的工藝條件下用雙螺桿擠出機(jī)制備不同橡塑比的橡塑高分子合金改性劑(橡塑比為5：5、6：4、7：3,分別簡稱為A改性劑、B改性劑和C改性劑)。通過紅外分析和差熱分析(DSC)研究廢舊塑料和廢舊橡膠的相容性機(jī)理。進(jìn)而將改性劑加入到瀝青中,研究改性劑的最佳摻量,并探索選用合適的穩(wěn)定劑、相容劑使改性瀝青穩(wěn)定化。通過對改性瀝青的組分分析、微觀結(jié)構(gòu)分析研究改性瀝青的相容機(jī)理。最后以橡膠改性瀝青和塑料改性瀝青作為對比樣本,利用動態(tài)剪切流變儀(DSR)分析不同改性瀝青的動態(tài)粘彈性能。 通過以上研究發(fā)現(xiàn)：廢舊塑料的溶解度參數(shù)約為7.85,廢舊橡膠的溶解度參數(shù)在8.35～8.45之間,兩者之差較小,具有較好的相容性；對改性劑的紅外分析和差熱分析表明,廢舊塑料橡膠的共混過程以物理作用為主,且C改性劑的相容性最好；研究橡塑改性瀝青發(fā)現(xiàn),三種橡塑改性瀝青中改性劑的最佳摻量都是20%,穩(wěn)定劑的最佳摻量是0.5%,沒有選用相容劑；通過對橡塑改性瀝青的微觀分析發(fā)現(xiàn),3種橡塑改性劑在瀝青中呈團(tuán)狀或絮狀分布,且C改性劑在瀝青中的分布最均勻,粒徑最小；通過對橡塑改性瀝青、塑料改性瀝青和橡膠改性瀝青的粘彈特性的分析及其主曲線的確定,發(fā)現(xiàn)橡塑改性瀝青的抗車轍能力最強(qiáng)。 本文的研究對進(jìn)一步研究橡塑改性瀝青及橡塑改性瀝青混合料的性能具有一定的理論意義及參考價(jià)值,對于橡塑改性瀝青的推廣應(yīng)用有一定的現(xiàn)實(shí)意義。
[Abstract]:With the increasing traffic volume and the increasing number of heavy-duty vehicles, some asphalt pavement appeared different early damage shortly after the official opening of traffic, which not only caused a lot of economic losses. In addition, with the development of economy, China produces a large number of waste plastics and rubber every year, which has caused great pressure to the environment. How to effectively solve these environmental problems has become a serious problem. If waste rubber and waste plastics are processed and added to asphalt to improve the performance of asphalt. It can not only effectively solve the pollution problem caused by waste tires and plastics, but also improve the road performance of asphalt materials, thus bringing about remarkable economic and social benefits. Aiming at the above problems, the mechanism of stabilized modified asphalt of waste rubber-plastic polymer alloy was studied. Firstly, the compatibility of waste plastic and waste rubber was analyzed by solubility parameter. Then, using waste plastics and waste rubber as raw materials, the rubber modifier with different ratio of rubber and plastic was prepared by twin-screw extruder (the ratio of rubber and plastic was 5: 5: 6: 4: 7: 3). The compatibility mechanism of waste plastics and waste rubber was studied by infrared and differential thermal analysis (DSCS), and then the modifier was added to asphalt. The optimum dosage of modifier was studied, and the suitable stabilizer and compatibilizer were selected to stabilize the modified asphalt. The composition of modified asphalt was analyzed. The compatibility mechanism of modified asphalt was studied by microstructure analysis. Finally, rubber modified asphalt and plastic modified asphalt were used as contrast samples. The dynamic viscoelastic properties of different modified asphalt were analyzed by dynamic shear rheometer (DSRs). It is found that the solubility parameter of waste plastics is about 7.85, the solubility parameter of waste rubber is 8.35 ~ 8.45, the difference between them is small and has good compatibility. The infrared and differential thermal analysis of the modifier show that the blending process of waste plastic rubber is mainly physical, and the compatibility of C modifier is the best. The study of rubber-plastic modified asphalt shows that the optimum dosage of modifier and stabilizer is 20 and 0.5 respectively, and no compatibilizer is selected. Through the microscopic analysis of rubber and plastic modified asphalt, it is found that three kinds of rubber and plastic modifiers are distributed in the asphalt as agglomerate or flocculent, and C modifier has the most uniform distribution and the smallest particle size in the asphalt. Based on the analysis of viscoelastic properties of rubber-plastic modified asphalt, plastic modified asphalt and rubber modified asphalt and the determination of main curve, it is found that rubber-plastic modified asphalt has the strongest rutting resistance. The research in this paper has certain theoretical significance and reference value to further study the performance of rubber and plastic modified asphalt and the rubber and plastic modified asphalt mixture, and has certain practical significance for the popularization and application of rubber and plastic modified asphalt.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414

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