本文選題：道路工程　切入點：廠拌冷再生　出處：《沈陽建筑大學》2014年碩士論文

【摘要】：乳化瀝青廠拌冷再生技術(shù)具有舊料利用率高,冷拌冷鋪、經(jīng)濟、節(jié)能環(huán)保等特點,因而受到廣泛關注。本文從遼寧省現(xiàn)有廠拌冷再生技術(shù)的實體工程應用狀況調(diào)查出發(fā),系統(tǒng)總結(jié)了成功的經(jīng)驗和存在的問題,通過大量室內(nèi)試驗研究,修正了廠拌冷再生技術(shù)配合比方法,評價了乳化瀝青廠拌冷再生混合料路用性能。并采用有限元分析方法分析該種材料的路面結(jié)構(gòu)力學響應,進而成功鋪筑了試驗路段。得到研究結(jié)論如下：在遼寧省應用廠拌冷再生技術(shù)的實體工程中選定代表性路段進行現(xiàn)場調(diào)研,通過芯樣厚度、交通量變化、級配和瀝青含量等室內(nèi)試驗分析研究,得到目前廠拌冷再生材料主要應用于下面層及基層,應用效果較好,芯樣的各項指標達到規(guī)范要求。論文采用橫向?qū)Ρ�、正交試驗等方法對乳化瀝青廠拌冷再生材料的最佳含水率、擊實成型與養(yǎng)生方法等進行了深入研究。結(jié)果表明：馬歇爾雙面擊實100次與土工擊實均能準確測得最佳含水率；水泥含量為1.5%,第一次雙面擊實100次,60℃烘箱養(yǎng)護2h再雙面擊實25次后測定試件的各項性能指標效果更佳；混合料的高溫、抗水損害等路用性能均滿足現(xiàn)行規(guī)范的技術(shù)要求。采用凈現(xiàn)值法進行壽命周期成本分析,對比了廠拌冷再生材料、普通熱拌瀝青混合料、貫入式瀝青混合料三者的經(jīng)濟效益,并進行社會和環(huán)境效益評價。結(jié)果表明：廠拌冷再生材料的使用壽命期末的總價值均高于其他兩種材料,經(jīng)濟、社會和環(huán)境效益顯著。應用ABAQUS有限元分析軟件,分析比較不同材料作為下面層結(jié)構(gòu)內(nèi)部受力特點。對比不同厚度、不同層位的冷再生結(jié)構(gòu)層層底受力狀況。模擬計算結(jié)果為廠拌冷再生材料受拉應力較小,結(jié)構(gòu)穩(wěn)定。冷再生材料作為下面層需要大于6cm,適用于二級及以下輕交通等級公路。冷再生材料作為柔性基層時需要大于8cm,適用于一級及以下輕中交通等級公路。以遼寧省撫順市環(huán)路改造工程為依托,鋪筑了乳化瀝青廠拌冷再生試驗路段,經(jīng)過3次路面技術(shù)狀況檢測,試驗路段的各項指標良好。
[Abstract]:The cold recycling technology of emulsified asphalt factory mix has the characteristics of high utilization ratio of used materials, cold mixing shop, economy, energy saving and environmental protection, so it has attracted wide attention. This paper starts from the investigation of the actual engineering application of the existing plant mix cold recycling technology in Liaoning Province. The successful experience and existing problems are summarized systematically. Through a large number of laboratory experiments, the mix proportion method of cold regeneration technology for factory mixing is modified. The pavement performance of emulsified asphalt cold recycled mixture was evaluated, and the mechanical response of the pavement structure was analyzed by finite element method. The conclusions are as follows: in the solid engineering of plant mix cold regeneration technology in Liaoning Province, the representative road sections are selected for field investigation, and the changes of core thickness and traffic volume are adopted. Through the laboratory test and analysis of gradation and asphalt content, it is concluded that the main reclaimed materials are mainly used in the lower layer and the base, and the application effect is good, and the core samples meet the requirements of the specifications. The optimum moisture content, compaction molding and health preservation of emulsified asphalt cold regenerated materials were studied by orthogonal test. The results show that the best moisture content can be measured accurately by 100 times of Marshall double-side compaction and geotechnical compaction. The cement content is 1.5 and the first 100 double-sided compaction at 60 鈩，

本文編號：1694271