本文選題：水發(fā)泡溫拌技術(shù)　切入點：體積參數(shù)　出處：《蘇州科技學院》2014年碩士論文　論文類型：學位論文

【摘要】：我國高等級公路以瀝青路面為主，傳統(tǒng)的熱拌瀝青混合料必須在高溫下進行拌合和攤鋪、壓實，不但消耗大量的能源，同時排放大量有害氣體，污染環(huán)境。此外，我國許多高等級公路即將進入大修期，翻修過程中將產(chǎn)生大量的廢舊瀝青混合料，如何處理這些廢舊料也成為我們亟待解決的難題。水發(fā)泡溫拌再生技術(shù)是改善這兩個方面的綠色環(huán)保新技術(shù)，不但能夠降低混合料的拌合和壓實溫度，而且將再生舊料利用起來，減少新礦料和新瀝青的加入量，起到了節(jié)能減排、保護環(huán)境的良好效果。 本文研究水發(fā)泡溫拌再生技術(shù)及其混合料的體積參數(shù)變化規(guī)律，包括廢舊瀝青的預處理，水發(fā)泡瀝青混合料配合比設(shè)計，廢舊料對水發(fā)泡再生瀝青混合料體積參數(shù)和路用性能的影響等關(guān)鍵技術(shù)。運用自行研制的一套室內(nèi)瀝青發(fā)泡設(shè)備進行瀝青發(fā)泡試驗研究，主要得出以下結(jié)論： 1）隨著發(fā)泡用水量的提高，發(fā)泡瀝青膨脹倍率增加，半衰期降低，1.5%用水量下的瀝青發(fā)泡效果最適宜。發(fā)泡瀝青和不發(fā)泡對比研究，發(fā)現(xiàn)普通基質(zhì)瀝青和改性瀝青的針入度分別增加了5.9%和4.5%，軟化點分別降低了5.7%和5.8%。發(fā)泡瀝青的DSR粘性部分和彈性部分均有所降低。 2）采用馬歇爾擊實設(shè)計方法，運用正交設(shè)計思路進行配合比設(shè)計，，得出水發(fā)泡溫拌瀝青混合料最適宜的配合比設(shè)計因素組合是擊實次數(shù)75次，發(fā)泡用水量1.5%，瀝青含量4.9%和擊實溫度150℃左右，實現(xiàn)降溫10℃左右。 3）用Superpave設(shè)計方法進行混合料配合比設(shè)計，發(fā)現(xiàn)水發(fā)泡溫拌混合料的最適宜壓實溫度在145℃附近，和熱拌相比降溫15℃左右。和熱拌相比，在混合料壓實過程中，水發(fā)泡溫拌瀝青混合料在壓實前期更易于壓實。 4）保證混合料級配基本一致的前提下，摻加再生舊料對水發(fā)泡溫拌再生瀝青混合料的體積參數(shù)進行研究，發(fā)現(xiàn)在同樣的瀝青含量下，再生料摻量相同時，摻加粗再生料時空隙率最大，摻加細再生料時空隙率最�。粨搅孔兓瘯r，隨著摻量的增加，混合料空隙率降低，其他體積參數(shù)也有相應(yīng)的變化。最終得出混合料的最佳瀝青含量。 5）混合料路用性能驗證結(jié)果表明，摻加再生料后，混合料的抗車轍性能高，抗水損害性能降低，且摻加細再生料的混合料水穩(wěn)定性能最差。
[Abstract]:The traditional hot mix asphalt mixture must be mixed and spread at high temperature, which not only consumes a lot of energy, but also emits a lot of harmful gases and pollutes the environment. Many high-grade highways in China are about to enter the overhaul period, and a large number of used asphalt mixtures will be produced in the course of renovation. How to deal with these waste materials also becomes a difficult problem to be solved urgently. The technology of water foaming and warm mixing and recycling is a new technology of improving green environmental protection in these two aspects, which can not only reduce the mixing and compaction temperature of the mixture, Moreover, it can reduce the addition of new mineral aggregate and bitumen, which can save energy and reduce emissions, and protect the environment. In this paper, the technology of water foaming warm mixing and recycling and its volume parameter change rule are studied, including pretreatment of waste asphalt, mix proportion design of water foamed asphalt mixture, The influence of waste materials on the volume parameters and road performance of recycled asphalt mixture with water foaming is studied by using a set of indoor asphalt foaming equipment developed by ourselves. The main conclusions are as follows:. 1) with the increase of foaming water consumption, the expansion rate of foamed asphalt increases, and the effect of asphalt foaming is most suitable when the half-life is reduced by 1.5% water. It is found that the penetration of common asphalt and modified asphalt increases by 5.9% and 4.5, respectively, and the softening point decreases by 5.7% and 5.8.The DSR viscosity and elastic parts of foamed asphalt are decreased. 2) by using Marshall compaction design method and orthogonal design method, it is concluded that the most suitable mix proportion design factor combination of water foaming and warm mix asphalt mixture is 75 compaction times. The foaming water consumption is 1.5, the asphalt content is 4.9% and the compaction temperature is about 150 鈩

本文編號：1567623