本文關(guān)鍵詞：換熱管道對太陽能集熱瀝青路面性能的影響研究　出處：《武漢理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 換熱管道 導(dǎo)熱瀝青混凝土 粘結(jié)性能 凍融循環(huán) 路用性能

【摘要】：太陽能具有取之不盡用之不竭、對環(huán)境影響小等優(yōu)點(diǎn),迅速成為各國競相關(guān)注和發(fā)展的重點(diǎn)。瀝青路面太陽能集熱技術(shù)是太陽能熱利用的一種,具有集熱面積巨大的優(yōu)勢,采用在瀝青路面中鋪設(shè)換熱管道,通過換熱介質(zhì)將路面中的熱能進(jìn)行收集利用,這對調(diào)控瀝青路面的服役溫度和緩解目前緊張的能源形勢具有十分重要的意義。針對以往的研究主要側(cè)重于其功能性研究和路面集熱性能影響因素的分析,而對換熱管道引起的瀝青路面性能的變化缺乏認(rèn)識這一現(xiàn)狀,本文開展了凍融循環(huán)次數(shù)對換熱管道與瀝青混凝土粘結(jié)性能以及換熱管道對瀝青混凝土路用性能影響規(guī)律的研究,探索了改善其界面粘結(jié)性能的方法。首先,利用石墨代替礦粉制備出導(dǎo)熱性能良好的瀝青混凝土,采用固定管道輪碾的方法制備出埋管瀝青混凝土,通過中心拔出實驗研究了凍融循環(huán)對換熱管道與瀝青混凝土粘結(jié)性能的影響規(guī)律。結(jié)果表明,換熱管道與瀝青混凝土之間的粘結(jié)強(qiáng)度和有效粘結(jié)長度有關(guān),隨著凍融次數(shù)的增加,換熱管道與瀝青混凝土的平均粘結(jié)強(qiáng)度大幅降低,并可以通過分段的線性函數(shù)來表示;第二,采用乳化瀝青、環(huán)氧樹脂和環(huán)氧瀝青三種粘結(jié)材料對換熱管道表面進(jìn)行處理,改善了換熱管道與瀝青混凝土粘結(jié)性能,其粘結(jié)強(qiáng)度分別提高了1.37倍、1.31倍和3.01倍;第三,車轍實驗和蠕變實驗結(jié)果表明,換熱管道的埋入能提高瀝青混凝土的高溫性能;低溫三點(diǎn)彎曲實驗可以發(fā)現(xiàn),在0℃時,埋管瀝青混凝土的最大彎拉應(yīng)變和開裂能比普通瀝青混凝土降低了42.84%和31.5%,然而埋管瀝青混凝土在低溫極限工作溫度0℃條件下的最大彎拉應(yīng)變和開裂能與普通瀝青混凝土在-10℃時的值接近;最后,采用四點(diǎn)彎曲疲勞實驗研究了換熱管道對瀝青混凝土疲勞性能的影響,結(jié)果表明,換熱管道的埋入對瀝青混凝土的疲勞壽命降低明顯,通過換熱管道表面處理可以提高埋管瀝青混凝土的疲勞性能。
[Abstract]:Solar energy has the advantages of inexhaustible and small impact on the environment and has become the focus of attention and development in many countries. Solar energy collection technology of asphalt pavement is a kind of solar energy thermal utilization. With the advantage of huge heat collection area, the heat transfer pipe is laid in the asphalt pavement, and the heat energy in the road surface is collected and utilized by heat transfer medium. This is of great significance for regulating the service temperature of asphalt pavement and alleviating the current energy situation. In view of the previous studies, it is mainly focused on the functional research and the analysis of the influencing factors of pavement heat collection performance. However, there is a lack of understanding of the performance change of asphalt pavement caused by heat transfer pipeline. In this paper, the influence of freezing and thawing cycle times on the adhesion between heat transfer pipeline and asphalt concrete and the influence of heat transfer pipe on pavement performance of asphalt concrete are studied, and the methods to improve the interface bond performance of asphalt concrete are explored. The bituminous concrete with good thermal conductivity was prepared by using graphite instead of ore powder, and the buried pipe asphalt concrete was prepared by the method of fixed pipe wheel mill. The effect of freeze-thaw cycle on the bond performance between asphalt concrete and freeze-thaw heat transfer pipe was studied by central pull-out experiment. The results show that the bond strength and effective bond length between heat transfer pipe and asphalt concrete are related. With the increase of freezing and thawing times, the average bond strength between heat transfer pipe and asphalt concrete decreases significantly, and can be expressed by piecewise linear function. Secondly, the surface of heat transfer pipe is treated with emulsified asphalt, epoxy resin and epoxy asphalt, which improves the bond performance between heat transfer pipe and asphalt concrete. The bond strength increased by 1.37 times, 1.31 times and 3.01 times, respectively. Thirdly, the results of rutting test and creep test show that the high temperature performance of asphalt concrete can be improved by embedding heat transfer pipe. At 0 鈩，

本文編號：1441024