本文選題：瀝青 + 紅外光譜��； 參考：《武漢理工大學(xué)》2014年碩士論文

【摘要】：近年來，隨著長壽命瀝青路面設(shè)計(jì)理論的提出，在高等級(jí)公路的施工過程中，對(duì)瀝青路面耐久性的要求越來越高。然而，瀝青屬于有機(jī)材料，眾所周知，在自然氣候環(huán)境中的熱、光、氧等的作用下，有機(jī)材料易老化；瀝青的老化所引起的多種病害，如裂縫、麻面和坑槽等，將大大縮短了瀝青路面的使用壽命。為延長瀝青路面的耐久性能，必須研究揭示瀝青在老化與抗老化過程中的成分與結(jié)構(gòu)的變化規(guī)律。紅外光譜法是研究瀝青組分及其分子結(jié)構(gòu)的最重要和最有效的實(shí)驗(yàn)手段之一，但由于瀝青成分及其結(jié)構(gòu)的復(fù)雜性，迄今瀝青紅外光譜的研究仍存在評(píng)價(jià)標(biāo)準(zhǔn)不統(tǒng)一、評(píng)價(jià)體系混亂等問題。本文利用多種來源不同的基質(zhì)瀝青和不同的改性瀝青，系統(tǒng)研究傅里葉變換紅外光譜法（FTIR）運(yùn)用于瀝青的各種指標(biāo)評(píng)價(jià)體系，以揭示瀝青的物理性能、成分及其分子結(jié)構(gòu)之間的關(guān)系規(guī)律。獲得的主要結(jié)論如下： （1）分別以瀝青紅外光譜的全振動(dòng)譜區(qū)(4000~700cm-1)、基團(tuán)伸縮振動(dòng)譜區(qū)(4000~1400cm-1)、指紋振動(dòng)譜區(qū)(1400~700cm-1)和飽和碳?xì)渖炜s振動(dòng)譜區(qū)(3000-2800cm-1)的總峰面積為基準(zhǔn)，計(jì)算分析瀝青中幾個(gè)主要官能團(tuán)的基團(tuán)指數(shù)，發(fā)現(xiàn)以4000~700cm-1全振動(dòng)譜區(qū)的峰面積為基準(zhǔn)計(jì)算的各官能團(tuán)相對(duì)含量，最能正確反映基團(tuán)含量與瀝青物理性能之間的關(guān)系規(guī)律。 （2）在實(shí)驗(yàn)室模擬的短期熱氧老化和短期紫外老化后，瀝青中羰基峰和亞砜基峰的峰面積變化增減不一，單獨(dú)的羰基峰面積更適合于評(píng)價(jià)道路瀝青的短期老化行為；但對(duì)于PAV長期老化，羰基和亞砜基峰的峰面積均隨老化時(shí)間的增加而增加，同時(shí)運(yùn)用羰基峰和亞砜基峰的面積兩個(gè)指標(biāo)評(píng)價(jià)道路瀝青的長期老化情況，更為精準(zhǔn)。 （3）通過四組分研究，，發(fā)現(xiàn)瀝青中飽和分、芳香分和瀝青質(zhì)在采取不同的老化方式老化后各自的變化規(guī)律相同，老化過程中飽和分沒有發(fā)生斷鏈和氧化，芳香分發(fā)生了縮聚反應(yīng)形成了稠環(huán)化合物。瀝青中的膠質(zhì)在不同的老化方式下有不同的表現(xiàn)：在熱氧老化下WAR（芳香指數(shù)變化率）和Wn≥4（長鏈指數(shù)變化率）均增加，形成了更多大分子的稠芳環(huán)，即轉(zhuǎn)變?yōu)闉r青質(zhì)；在紫外老化下WAR和Wn≥4均不變，主要表現(xiàn)為亞砜基官能團(tuán)指數(shù)的變化率增大，表明在紫外光作用下，膠質(zhì)中的雜原子發(fā)生了氧化反應(yīng)。 （4）層狀雙羥基復(fù)合金屬氫氧化物（LDHs）具有多級(jí)層狀結(jié)構(gòu)，其多級(jí)層板和層間能產(chǎn)生對(duì)紫外線的多重吸收和屏蔽，從而起到對(duì)紫外線的阻隔作用；有機(jī)化蒙脫土（OMMT）也具有類似的層狀結(jié)構(gòu)，OMMT片層可有效阻止氧在瀝青中的擴(kuò)散從而抑制瀝青的老化；紫外吸收劑通過自身對(duì)紫外線的吸收，來避免或減輕紫外線對(duì)瀝青分子的直接破壞。利用上述全譜區(qū)基準(zhǔn)法，對(duì)LDHs、OMMT和紫外吸收劑在瀝青抗老化過程中的作用，以及改性瀝青在老化過程中相關(guān)特征基團(tuán)含量的變化情況進(jìn)行了評(píng)價(jià)，進(jìn)一步證實(shí)了全譜基準(zhǔn)法的可靠性。
[Abstract]:In recent years, with the development of long life asphalt pavement design theory, the requirement for durability of asphalt pavement is becoming more and more high during the construction of high grade highway. However, asphalt belongs to organic material. It is well known that organic materials are easily aging under the effect of heat, light and oxygen in natural climate environment; many kinds of asphalt aging are caused by the aging of the natural climate environment. Diseases, such as cracks, slots and pit grooves, will greatly shorten the service life of asphalt pavement. In order to prolong the durability of asphalt pavement, it is necessary to study the changes in the composition and structure of Asphalt during aging and aging resistance. The infrared spectroscopy is the most important and effective laboratory for the study of asphalt components and its molecular structure. However, due to the complexity of the asphalt composition and its structure, there are still some problems in the research of the infrared spectrum of bitumen, such as the evaluation standard is not uniform and the evaluation system is confused. In this paper, a variety of different sources of matrix bitumen and different modified bitumen are used in this paper to systematically study the various index evaluation of the Fourier transform infrared spectroscopy (FTIR) used in asphalt. The main conclusions are as follows: 1.
(1) the group exponents of several major functional groups in bitumen are calculated and analyzed with the full vibrational spectral region (4000~700cm-1), the group expansion vibration spectrum region (4000~1400cm-1), the fingerprint spectrum region (1400~700cm-1) and the saturated hydrocarbon expansion vibration spectrum region (3000-2800cm-1), respectively. It is found that the 4000~700cm-1 full vibrational spectrum is found. The relative content of each functional group calculated on the basis of the peak area of the area can best reflect the relationship between the group content and the physical properties of asphalt.
(2) the peak area of carbonyl and sulfoxide peaks in bitumen is not one, but the peak area of the carbonyl group is more suitable for evaluating the short-term aging behavior of asphalt. However, the peak area of carbonyl and sulfoxide base peaks is increased with the increase of aging time for the long-term aging of PAV. It is more accurate to evaluate the long-term aging of paving asphalt by using two indicators of carbonyl peak and sulfoxide peak area.
(3) through the study of four components, it is found that the saturated fraction, aromatic fraction and asphaltene in asphalt have the same changing rules after aging in different aging ways. There is no broken chain and oxidation in the aging process, and the condensation reaction of aromatic fractions has formed a thick ring compound. The gum in asphalt has different aging methods. The expression of WAR (aromatic index change rate) and Wn > 4 (long chain index change rate) increased in the thermal oxygen aging. The thickening aromatic ring of more macromolecules was formed, that is, the transition to asphaltene. Under UV aging, WAR and Wn > 4 are all constant, mainly as the change rate of the sulfoxide functional group index, indicating that under ultraviolet light, the colloid is in the presence of ultraviolet light. The atom of the heteroatom has an oxidation reaction.
(4) layered double hydroxyl complex metal hydroxide (LDHs) has multilayered structure, and its multistage laminates and interlayers can produce multiple absorption and shielding of ultraviolet light, which can prevent ultraviolet radiation. Organic montmorillonite (OMMT) also has a similar layered structure, and the OMMT lamellar can effectively prevent oxygen diffusion in asphalt and suppress the diffusion of oxygen in the asphalt. The effect of LDHs, OMMT and UV Absorbents on the anti aging process of asphalt and the change of the related characteristic group content during the aging process of asphalt in the process of asphalt aging are avoided or mitigated by UV Absorbents. The evaluation results further confirm the reliability of the full spectrum benchmark method.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U414

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 洪琨;馬鳳云;劉景梅;鐘梅;;塔河常壓渣油及其亞組分的非等溫?zé)徂D(zhuǎn)化反應(yīng)性能研究[J];石油煉制與化工;2015年12期

相關(guān)碩士學(xué)位論文 前2條

1 朱崇政;無機(jī)納米粒子與蛭石復(fù)配改性瀝青的制備與性能研究[D];湖南大學(xué);2016年

2 卜洪洋;原花青素提取純化工藝及生產(chǎn)過程紅外分析[D];北京林業(yè)大學(xué);2016年

本文編號(hào)：2025394