本文選題：瀝青 + 氣候��； 參考：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：瀝青膠結(jié)料選用不當(dāng)會(huì)直接導(dǎo)致瀝青路面早期病害的產(chǎn)生,這些病害直接影響到瀝青路面的耐久性和安全性,所以,選擇優(yōu)質(zhì)瀝青是解決瀝青路面早期病害的關(guān)鍵。我國(guó)幅員遼闊,氣候條件比較復(fù)雜,不同等級(jí)道路交通荷載狀況差異也較大,加之,國(guó)內(nèi)瀝青市場(chǎng)上瀝青品牌繁多,當(dāng)面對(duì)多種都滿足規(guī)范要求的瀝青時(shí),優(yōu)選瀝青工作就比較困難。因此,研究基于氣候、交通條件及瀝青性能的定量?jī)?yōu)選方法具有十分重要的意義。提出瀝青優(yōu)選方法的總體思路,即通過(guò)選擇瀝青優(yōu)選評(píng)價(jià)要素、評(píng)價(jià)要素評(píng)價(jià)指標(biāo)選擇、評(píng)價(jià)指標(biāo)的評(píng)分取值及瀝青優(yōu)選評(píng)價(jià)要素權(quán)重的確定,計(jì)算瀝青性能綜合指數(shù);選擇的優(yōu)選評(píng)價(jià)要素是高溫性能、低溫性能、感溫性能、抗老化性能;提出利用各氣候分區(qū)內(nèi)高溫、低溫、溫差、影響瀝青老化氣候條件的相對(duì)重要程度,確定對(duì)應(yīng)的瀝青優(yōu)選評(píng)價(jià)要素的權(quán)重,并且對(duì)重載交通條件下優(yōu)選要素權(quán)重進(jìn)行調(diào)整的思路。對(duì)不同類(lèi)型瀝青的感溫性能、高溫性能、低溫性能、抗老化性能進(jìn)行綜合分析與評(píng)價(jià),得出以下結(jié)論:1、推薦采用PI對(duì)瀝青感溫性能進(jìn)行評(píng)價(jià);2、推薦采用軟化點(diǎn)對(duì)瀝青感溫性能進(jìn)行評(píng)價(jià);3、采用低溫等級(jí)溫度TLC能夠?qū)ν坏蜏氐燃?jí)瀝青的低溫性能進(jìn)行區(qū)分,在瀝青優(yōu)選時(shí),推薦采用低溫延度對(duì)瀝青低溫性能進(jìn)行評(píng)價(jià);4、采用短期老化殘余延度、殘余針入度比作為瀝青優(yōu)選抗老化性能評(píng)價(jià)指標(biāo)。借助DSC、GPC、FTIR對(duì)不同類(lèi)型瀝青的微觀結(jié)構(gòu)進(jìn)行測(cè)試,結(jié)合瀝青的聚集態(tài)和分子量能夠?qū)r青路用性能的優(yōu)劣進(jìn)行解釋,利用紅外光譜圖能夠解釋瀝青老化的機(jī)理,并且能夠從定量分析角度區(qū)分不同瀝青的抗老化性能。結(jié)合多種瀝青技術(shù)指標(biāo)數(shù)據(jù)統(tǒng)計(jì)分析,建立70#、90#基質(zhì)瀝青、SBS I-C改性瀝青評(píng)分取值依據(jù),對(duì)70#、90#基質(zhì)瀝青、SBS I-C改性瀝青技術(shù)指標(biāo)評(píng)分;對(duì)各氣候分區(qū)內(nèi)高溫、低溫、溫差、影響瀝青老化的氣候條件的等級(jí)進(jìn)行劃分,借助層次分析法的比較矩陣,確定瀝青高溫、低溫、感溫、抗老化性能的權(quán)重,并且對(duì)重載交通條件下各項(xiàng)路用性能的權(quán)重進(jìn)行適當(dāng)?shù)恼{(diào)整;通過(guò)瀝青綜合性能指數(shù)計(jì)算公式,計(jì)算七種品牌70#、90#基質(zhì)瀝青、SBS I-C改性瀝青的綜合性能指數(shù),利用綜合性能指數(shù)的排序結(jié)果,為部分氣候分區(qū)推薦了綜合性能突出的瀝青。
[Abstract]:Improper selection of bituminous binder will directly lead to the emergence of early diseases of asphalt pavement, which directly affect the durability and safety of asphalt pavement. Therefore, the selection of high quality asphalt is the key to solve the early disease of asphalt pavement. China has a vast territory, complex climatic conditions, and great differences in traffic loads on different grades of roads. In addition, there are many asphalt brands in the domestic asphalt market, so when many kinds of asphalt meet the requirements of the specifications, It is difficult to select asphalt. Therefore, it is of great significance to study the quantitative selection method based on climate, traffic conditions and asphalt performance. The general idea of asphalt optimal selection method is put forward, that is, the comprehensive index of asphalt performance is calculated by selecting the evaluation elements of asphalt optimal selection, selecting the evaluation index of evaluation elements, selecting the score of evaluation indexes and determining the weight of asphalt optimal selection evaluation elements. The optimum selection and evaluation factors are high temperature performance, low temperature performance, temperature sensing performance, aging resistance, and the relative importance of using high temperature, low temperature and temperature difference in each climate zone to influence the aging climate conditions of asphalt is put forward. The weight of the corresponding asphalt optimal selection evaluation elements is determined, and the train of thought of adjusting the weight of the optimal selection elements under heavy traffic conditions is given. The temperature sensing, high temperature, low temperature and aging resistance of different kinds of asphalt were analyzed and evaluated. The following conclusions are drawn: 1. Pi is recommended to evaluate the temperature sensing performance of asphalt, and softening point is recommended to evaluate the temperature sensing performance of asphalt. The low temperature grade temperature TLC can distinguish the low temperature performance of asphalt with the same low temperature grade. It is recommended that the low temperature ductility be used to evaluate the low temperature performance of asphalt, and the short term aging residual ductility and the residual penetration ratio should be used as the evaluation indexes of asphalt excellent selection and anti aging performance. The microstructure of different types of asphalt was tested by means of DSC-GPC-FTIR, and the performance of asphalt was explained by the aggregation state and molecular weight of asphalt. The mechanism of asphalt aging could be explained by infrared spectroscopy. And it can distinguish the aging resistance of different asphalt from the angle of quantitative analysis. Based on the statistical analysis of technical index data of several kinds of asphalt, the paper establishes the evaluation basis of SBS I-C modified asphalt of 70 #yun90# matrix asphalt, marks the technical index of SBS I-C modified asphalt of 70 #yun90# matrix asphalt, and points out the high temperature, low temperature and temperature difference in each climate zone. With the help of the comparison matrix of analytic hierarchy process (AHP), the weight of asphalt's high temperature, low temperature, temperature sensing and aging resistance is determined. The weight of each road performance under heavy traffic condition is adjusted properly, and the comprehensive performance index of SBS I-C modified asphalt is calculated by calculating the formula of asphalt comprehensive performance index. Based on the ranking results of comprehensive performance index, asphalt with outstanding comprehensive performance is recommended for some climatic zones.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U414

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本文編號(hào)：1897574