本文選題：道路工程　切入點(diǎn)：瀝青　出處：《長安大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年06期

【摘要】：利用熱分析質(zhì)譜聯(lián)用技術(shù)研究不同老化狀態(tài)的瀝青微觀組成、結(jié)構(gòu)與宏觀路用性能之間的聯(lián)系。首先制備瀝青結(jié)合料短期老化和長期老化試樣,然后采用熱重-差熱分析-質(zhì)譜聯(lián)用技術(shù),分析不同老化狀態(tài)瀝青的熱性質(zhì)及逸出物質(zhì)結(jié)構(gòu)。研究結(jié)果表明:基質(zhì)瀝青、短期老化和長期老化的瀝青試樣分解過程的溫度范圍及峰值對應(yīng)溫度基本一致;低于300℃的溫度范圍內(nèi),試樣老化程度對熱重?fù)p失速率影響較小;瀝青高溫分解階段,長期老化質(zhì)量損失速率最低,基質(zhì)瀝青最高,短期老化試樣居中;3種老化狀態(tài)的瀝青試樣熱分解產(chǎn)物主要有CO、H2O、CH4、CO2,該產(chǎn)物主要來源于瀝青中大分子烷烴的高溫分解和碳元素氧化;熱重曲線殘留質(zhì)量比與瀝青復(fù)數(shù)模量有較好的聯(lián)系,隨著瀝青老化程度增大,TG曲線上殘留質(zhì)量比逐漸增加,在宏觀上表現(xiàn)為復(fù)數(shù)模量增大。
[Abstract]:The relationship between microstructure, structure and macroscopical performance of asphalt in different aging states was studied by thermal analysis mass spectrometry. First, the short-term aging and long-term aging samples of asphalt binder were prepared. Then thermogravimetric differential thermal analysis-mass spectrometry was used to analyze the thermal properties and escape structure of asphalt in different aging states. The temperature range and peak corresponding temperature of the decomposition process of the asphalt samples aged in the short and long term are basically the same; in the temperature range below 300 鈩，

本文編號：1687376