本文選題：泡沫瀝青　切入點：發(fā)泡效果　出處：《同濟大學》2008年碩士論文　論文類型：學位論文

【摘要】： 本文通過資料調研、室內試驗、理論分析及工程經驗總結,對泡沫瀝青冷再生技術的瀝青發(fā)泡特性和評價方法、混合料性質及關聯因素、材料特征及級配要求、配合比設計過程及工程應用經驗進行研究探討,對該技術進行總結完善,并力求形成完整的理論體系,以指導今后的室內材料設計和工程應用過程。 通過室內瀝青發(fā)泡試驗,研究瀝青發(fā)泡特性及其影響因素,并探討瀝青發(fā)泡效果和泡沫瀝青再生混合料性能之間的相關性。試驗結果顯示:瀝青種類、發(fā)泡用水量和發(fā)泡用水溫度顯著影響發(fā)泡效果,而瀝青溫度對發(fā)泡效果的影響不大;在發(fā)泡用水量增加過程中,5%發(fā)泡用水量前后的發(fā)泡指標變化規(guī)律發(fā)生改變;瀝青發(fā)泡效果和泡沫瀝青再生混合料的性能相關性不顯著。在上述結論的基礎上,進而分析了“最佳發(fā)泡條件”的缺陷,認為應當以“合適發(fā)泡范圍”代替“最佳發(fā)泡條件”,用以指導實際的工程應用。 探討了泡沫瀝青再生混合料的材料特征、級配設計原則與粉料通過百分率標準。從顆粒外觀狀態(tài)入手,分析了銑刨料的分類標準和級配影響因素。在室內數據、強度形成機理和工程經驗的基礎上,提出了應當以銑刨料級配指導泡沫瀝青冷再生的現場施工和級配設計。并針對粉料目標通過率普遍無法達標的我國工程現狀,設計室內試驗。最終發(fā)現3%的粉料通過率即可獲得性能優(yōu)良的泡沫瀝青再生混合料,因此建議將0.3mm以下篩孔的目標通過百分率下限適當降低。 本文還優(yōu)化了泡沫瀝青再生混合料的配合比設計過程。通過引入正交試驗方法,對現有的單向簡單的配合比設計過程進行調整,使得在配合比設計過程中,能夠充分考慮泡沫瀝青用量、拌和用水量、級配方案等主要設計內容的相互影響和各種組合,最終同時確定最佳拌和用水量、最佳級配方案、最佳瀝青用量等關鍵設計指標。
[Abstract]:Based on data investigation, laboratory test, theoretical analysis and engineering experience, the foaming characteristics and evaluation methods, mixture properties and related factors, material characteristics and grading requirements of foamed asphalt cold recycling technology are studied in this paper. In order to guide the design and engineering application of indoor materials in the future, the proportion design process and engineering application experience are studied and discussed, the technology is summarized and perfected, and a complete theoretical system is formed to guide the interior material design and engineering application process in the future. Through the indoor asphalt foaming test, the foaming characteristics of asphalt and its influencing factors are studied, and the correlation between the asphalt foaming effect and the performance of foamed asphalt recycled mixture is discussed. The foaming effect was significantly affected by foaming water consumption and water temperature, but not by bitumen temperature, and the change of foaming index was changed during the process of increasing water consumption by 5%. The correlation between asphalt foaming effect and performance of foamed asphalt recycled mixture is not significant. On the basis of the above conclusion, the defects of "optimum foaming condition" are analyzed. It is suggested that "suitable foaming range" should be replaced by "optimum foaming condition" to guide practical engineering application. This paper discusses the material characteristics, grading design principles and percentage standard of foamed asphalt recycled mixture. Starting with the appearance state of particles, the classification criteria and gradation influencing factors of milling and planing materials are analyzed, and the indoor data are analyzed. On the basis of strength forming mechanism and engineering experience, it is proposed that milling gradation should be used to guide the field construction and grading design of cold regeneration of foamed asphalt. In the design room test, it is found that the fine foamed asphalt recycled mixture can be obtained with the passing rate of 3% powder. Therefore, it is suggested that the target of the sieve hole below 0.3 mm should be reduced properly through the lower limit of the percentage. This paper also optimizes the mix ratio design process of foamed asphalt recycled mixture. By introducing the orthogonal test method, the existing one-way simple mix ratio design process is adjusted, so that in the mix proportion design process, It can fully consider the interaction and combination of the main design contents, such as the amount of foamed asphalt, mixing water consumption, gradation scheme and so on. Finally, the key design indexes such as the best mixing water consumption, the best gradation scheme and the optimum asphalt content can be determined at the same time.
【學位授予單位】：同濟大學
【學位級別】：碩士
【學位授予年份】：2008
【分類號】：U414

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