本文選題：表面自由能　切入點：瀝青-礦料界面　出處：《復(fù)合材料學(xué)報》2016年10期

【摘要】：根據(jù)表面能理論,采用接觸角測量法測定鹽凍循環(huán)前后苯乙烯-丁二烯-苯乙烯(SBS)、廢胎膠粉(CR)和復(fù)合膠粉(CCR)3種聚合物改性瀝青、石灰?guī)r、玄武巖和花崗巖的表面自由能參數(shù),分別計算出鹽凍循環(huán)前后瀝青-礦料系統(tǒng)的粘附功和剝落功,從而確定鹽凍循環(huán)對瀝青-礦料系統(tǒng)粘附和剝落特性的影響。結(jié)果表明:鹽凍循環(huán)前后,瀝青與礦料的粘附過程以及水侵入瀝青-礦料界面的剝落過程的比表面自由能變化均為負(fù)值,說明瀝青與礦料的粘附過程和剝落過程均自發(fā)進(jìn)行;隨著鹽凍循環(huán)次數(shù)和鹽濃度的增加,瀝青-礦料系統(tǒng)粘附功逐漸減小,剝落功逐漸增大,粘附性和抗水損害能力逐漸減弱;當(dāng)瀝青種類相同時,瀝青與石灰?guī)r的粘附功最大,剝落功最小,瀝青與花崗巖的粘附功最小,剝落功最大;當(dāng)?shù)V料種類相同時,CCR改性瀝青與礦料的粘附功最大,剝落功最小,SBS改性瀝青與礦料的粘附功最小,剝落功最大。
[Abstract]:Based on the theory of surface energy, the surface free energy parameters of three kinds of polymer modified asphalt, limestone, basalt and granite were measured by contact angle measurement before and after salt freezing cycle. The adhesion work and spalling work of bituminous aggregate system before and after salt freezing cycle were calculated respectively, and the effect of salt freezing cycle on adhesion and spalling characteristics of bituminous aggregate system was determined. The results showed that: before and after salt freezing cycle, The change of specific surface free energy of bitumen and aggregate adhesion process and water invasion bitumen-aggregate interface spalling process are all negative, which indicates that the adhesion process and spalling process of asphalt and mineral aggregate occur spontaneously. With the increase of salt freezing cycle times and salt concentration, the adhesion work of asphalt-aggregate system decreases gradually, the spalling work increases, the adhesion property and water damage resistance ability weaken gradually, and when the type of asphalt is the same, the adhesion work between asphalt and limestone is the greatest. When the type of mineral aggregate is the same, the adhesion work between CCR modified asphalt and mineral aggregate is the greatest, the spalling work is minimum, and the adhesion work between SBS modified asphalt and mineral aggregate is the minimum, and the spalling work is the largest.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院;內(nèi)蒙古農(nóng)業(yè)大學(xué)能源與交通工程學(xué)院;
【基金】：國家自然科學(xué)基金(11462018) 內(nèi)蒙古自然科學(xué)基金(2014MS0507)
【分類號】：U414

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本文編號：1655989