發(fā)布時間：2018-09-17 07:52

【摘要】：溫拌瀝青(Warm Mix Asphalt簡稱WMA)是相對于傳統(tǒng)的熱拌瀝青(Hot Mix Asphalt簡稱HMA)而言的一種新技術,它通過一定的技術措施使得瀝青混合料在低于熱拌瀝青的拌合溫度下進行拌合與壓實。同時保持溫拌瀝青混合料有不低于HMA瀝青混合料的性能,并減少能源消耗和廢氣排放。瀝青的耦合老化是指瀝青在幾種不同的老化條件共同作用下的老化。本文依托重慶市科委自然基金(101033)《低碳排放復合SBS改性瀝青混泥土開發(fā)與動靜態(tài)特征性研究》,展開對基于降粘和表面活性技術的溫拌瀝青性能的比對研究。選取AH70#基質(zhì)瀝青、SBS改性瀝青,分別添加有機降粘溫拌劑Sasobit和表面活性溫拌劑DAT,對比分析不同溫拌劑對兩種瀝青的性能影響。采用規(guī)范規(guī)定老化條件和基于光、熱、濕的耦合老化條件,對有機降粘溫拌劑Sasobit和表面活性溫拌劑DAT改性的溫拌瀝青老化前后性能變化和老化敏感性進行了較深入的研究。論文采用膠結料針入度評價體系和SHRP膠結料評價體系,首先比對研究了老化前溫拌劑Sasobit和DAT對AH70#基質(zhì)瀝青和SBS改性瀝青性能的影響,然后基于RTFOT老化條件,分析和評價了溫拌瀝青性能變化規(guī)律和老化敏感性。進一步研究了光、熱、濕耦合老化條件下,溫拌瀝青常規(guī)性能、抗車轍性能、疲勞性能變化規(guī)律。找出了影響瀝青老化性能的主要因素和次要因素,建立了相關數(shù)學模型,同時比較了兩種溫拌技術在環(huán)境耦合條件下性能的優(yōu)劣,給出不同溫拌瀝青合理使用環(huán)境條件,為溫拌技術在我國的發(fā)展提供參考。
[Abstract]:(Warm Mix Asphalt (WMA) is a new technology compared with the traditional hot asphalt (Hot Mix Asphalt (HMA). It makes the asphalt mixture mix and compacted under the mixing temperature of hot mix asphalt through certain technical measures. At the same time, the performance of warm mix asphalt mixture is not lower than that of HMA asphalt mixture, and energy consumption and exhaust gas emission are reduced. The coupled aging of asphalt refers to the aging of asphalt under several different aging conditions. Based on Chongqing Science and Technology Commission Natural Fund (101033) "Development and dynamic and static characteristics of low carbon Emission Composite SBS modified Asphalt concrete", a comparative study on the properties of warm mix asphalt based on viscosity reduction and surface activity technology was carried out. The AH70# matrix asphalt modified by Sasobit and the surface active warm mix agent DAT, were added respectively to analyze the effects of different warm-mix agents on the performance of the two kinds of asphalt. Based on the coupling aging conditions of light, heat and humidity, the properties and sensibility of warm asphalt modified by organic viscosity reducing agent Sasobit and surface active warm mix agent DAT were studied in this paper by means of standard aging conditions and coupling aging conditions based on light, heat and humidity. In this paper, the impact of Sasobit and DAT on the performance of AH70# matrix asphalt and SBS modified asphalt was studied by comparing the binder penetration evaluation system and SHRP binder evaluation system. Then, based on the aging conditions of RTFOT, the effects of Sasobit and DAT on the properties of AH70# matrix asphalt and SBS modified asphalt were studied. The performance change law and aging sensitivity of warm mix asphalt were analyzed and evaluated. The changes of conventional performance, rutting resistance and fatigue performance of warm asphalt under light, heat and wet coupling aging conditions were further studied. The main and secondary factors affecting asphalt aging performance were found out, and the related mathematical models were established. At the same time, the advantages and disadvantages of the two warm mixing technologies under the environmental coupling conditions were compared, and the reasonable environmental conditions for different warm mix asphalt were given. It provides reference for the development of warm mixing technology in China.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414

【參考文獻】

相關期刊論文 前1條

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本文編號：2245220