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  本文選題：SBS改性瀝青　切入點(diǎn)：瀝青混合料　出處：《重慶交通大學(xué)》2014年碩士論文

【摘要】：SBS改性瀝青混合料是我國高等級路面的主要修筑材料,當(dāng)路面達(dá)到使用壽命后,若將這些廢舊混合料再生利用,將產(chǎn)生巨大的社會經(jīng)濟(jì)效益和環(huán)境保護(hù)效益。 本文將SBS改性瀝青宏觀上的技術(shù)性質(zhì)變化與微觀上組分、分子官能團(tuán)和分子量變化進(jìn)行聯(lián)合分析,表明SBS改性瀝青的老化機(jī)理是：SBS的降解分解和瀝青中化學(xué)性質(zhì)活潑的分子進(jìn)行吸氧縮合等反應(yīng),使SBS改性瀝青的組分發(fā)生遷移,破壞了其原來的膠體結(jié)構(gòu),改變了其分子量分布,導(dǎo)致性能大量衰減。 基于SBS改性瀝青的老化機(jī)理,歸納總結(jié)出再生劑成分的選擇原則,并由此選擇了芳烴油、液態(tài)石油樹脂等六種物質(zhì)作為再生劑的成分�？紤]到多數(shù)再生劑因針對性較強(qiáng)而導(dǎo)致適用范圍小,本文將六種成分分為A、B兩組,當(dāng)兩組再生劑以不同比例混合時,均能有效對不同品種不同老化程度的SBS改性瀝青進(jìn)行再生。 為了驗(yàn)證再生劑對廢舊SBS改性瀝青混合料的再生效果,選取了A、B兩組再生劑組調(diào)配出兩種具有實(shí)用性和經(jīng)濟(jì)性的再生劑,以不同比例加入到廢舊SBS改性瀝青混合料中,在舊料摻配比例為50%的情況下,再生SBS瀝青混合料具有優(yōu)良的高溫穩(wěn)定性和水穩(wěn)定性,滿足瀝青路面施工技術(shù)規(guī)范對高速公路上面層的技術(shù)要求。
[Abstract]:SBS modified asphalt mixture is the main construction material of high grade pavement in our country. When the pavement reaches its service life, if the waste mixture is recycled, it will produce enormous social and economic benefits and environmental protection benefits.In this paper, the changes of macroscopic technical properties of SBS modified asphalt are analyzed in conjunction with the microscopic components, molecular functional groups and molecular weight changes.The results show that the aging mechanism of SBS modified asphalt is the decomposition of SBS and the reaction of chemical active molecules in the asphalt such as oxygen absorption condensation and so on, which makes the component of SBS modified asphalt migrate and destroys its original colloidal structure.The molecular weight distribution is changed, which results in a large attenuation of the performance.Based on the aging mechanism of SBS modified asphalt, the selection principle of regenerating agent was summarized, and six kinds of substances, such as aromatic oil and liquid petroleum resin, were selected as the components of regenerative agent.Considering that most regenerative agents have a small application range due to their strong pertinence, the six components are divided into two groups. When the two groups of regenerative agents are mixed with different proportion, they can effectively regenerate the SBS modified asphalt with different varieties and different aging degrees.In order to verify the regeneration effect of recycled agent on waste SBS modified asphalt mixture, two kinds of practical and economical regenerating agents were prepared from two groups of recycled agent groups, and were added to the waste SBS modified asphalt mixture in different proportion.The recycled SBS asphalt mixture has excellent high temperature stability and water stability under the condition of 50% admixture ratio of the old materials, which meets the technical requirements of the asphalt pavement construction technical specification for the expressway upper surface layer.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414

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本文編號：1685241