【摘要】：本研究提出在瀝青混凝土路面構(gòu)造內(nèi)部，根據(jù)對(duì)渠化交通條件下，車輛行駛的輪跡帶分布規(guī)律，在行車道中軸線對(duì)稱的兩條各0.5m寬的路面上，鋪設(shè)兩條尺寸為50cm×100cm×10cm，頂面弧度為5°~10°的碳纖維-水泥乳化瀝青砂漿路板，形成具有微波輻射下融冰化雪功能的加熱帶，另一方面，對(duì)加熱帶與既有道路及新建道路的組合形式提出設(shè)想，采用以玄武巖為集料的水泥乳化瀝青混合料作為路板與路面中面層間的絕熱層，厚度30~50mm。 綜述了促進(jìn)碳纖維均勻分散以及三種評(píng)價(jià)分散性的方法，提出CT斷層掃描技術(shù)表征加熱帶中短碳纖維分散性，借助軟件Image pro plus8.0對(duì)其進(jìn)行圖像預(yù)處理、特征區(qū)域識(shí)別、特征區(qū)域提取與計(jì)算等，給出了一整套定量評(píng)價(jià)分散性的計(jì)算公式。同時(shí)，利用軟件MIMICS對(duì)CT圖像進(jìn)行三維重建，并根據(jù)重建模型進(jìn)行有限元分析，結(jié)果表明：碳纖維束團(tuán)會(huì)引起束團(tuán)區(qū)域的應(yīng)力集中，導(dǎo)致該區(qū)域在臨界荷載下首先破壞，從而引起裂縫的擴(kuò)張。 采用彎拉強(qiáng)度與韌性指數(shù)為評(píng)價(jià)指標(biāo)，研究了碳纖維用量、碳纖維表面處理工藝、碳纖維長度等因素與復(fù)合材料力學(xué)性能之間的關(guān)系，解析了其變化規(guī)律，給出了影響機(jī)理，結(jié)果表明：碳纖維經(jīng)過常溫硝酸、硝酸水浴和混酸水浴表面處理后，極限彎拉強(qiáng)度和跨中位移明顯提高，其中經(jīng)過混酸水浴后，其增幅分別達(dá)到了42.2%和87.5%。碳纖維體積用量Vcf=0.6~1.0%、長度為1~10mm作為加熱帶使用的碳纖維參數(shù)，可作為實(shí)際應(yīng)用中的參考值。 給出了冰層與路面的凍黏界面模型，提出以微波照射下試件生熱速率的計(jì)算公式，研究了碳纖維用量與乳化瀝青用量對(duì)微波生熱速率的影響，并深入分析其影響機(jī)理，結(jié)果表明：Vcf=0.4%~1.0%時(shí)，照射時(shí)間30s內(nèi)，微波生熱速率最佳，，其中Vcf=0.6%的關(guān)鍵生熱速率k0最佳。在AE/C=5%與AE/C=10%用量下生熱速率維持在較高水平，分別為504.4J/s、478.1J/s。實(shí)驗(yàn)室研究與計(jì)算機(jī)模擬技術(shù)共同表明其除冰效果較為理想。
[Abstract]:In this paper, it is put forward that in the interior of asphalt concrete pavement structure, according to the distribution law of wheel track band of vehicle running under the condition of channelized traffic, two 50cm 脳 100cm 脳 10 cms are laid on two symmetrical road surfaces with symmetrical axis in the middle of the carriageway. Carbon fiber cement emulsified asphalt mortar pavement with top radians of 5 擄~ 10 擄forms a heating zone with the function of melting snow and ice under microwave radiation. On the other hand, the combination of heating belt with existing roads and new roads is proposed. The cement emulsified asphalt mixture with basalt as aggregate is used as the insulation layer between the road slab and the middle surface of the pavement with a thickness of 30 ~ 50mm. In this paper, three methods to promote the uniform dispersion of carbon fiber and three methods to evaluate the dispersion of carbon fiber are reviewed. CT tomography technique is proposed to characterize the dispersion of short carbon fiber in heating tape. The image preprocessing and feature region recognition are carried out with the help of software Image pro plus8.0. In this paper, a set of formulas for quantitative evaluation of dispersion are given, such as extraction and calculation of feature regions. At the same time, the 3D reconstruction of CT image is carried out by software MIMICS, and the finite element analysis is carried out according to the reconstruction model. The results show that the stress concentration in the area of the bundle is caused by the carbon fiber bundle, which leads to the first failure of the area under critical load. Thus causing the crack to expand. The relationship between the amount of carbon fiber, the surface treatment process of carbon fiber, the length of carbon fiber and the mechanical properties of the composite is studied by using the flexural strength and toughness index as the evaluation index. The variation law of the composite is analyzed, and the influencing mechanism is given. The results show that the ultimate flexural tensile strength and mid-span displacement of carbon fiber treated with nitric acid at room temperature, nitric acid bath and mixed acid bath increase obviously, and the increase of carbon fiber after mixed acid bath reaches 42.2% and 87.5% respectively. Carbon fiber volume Vcf=0.6~1.0%, length of 1~10mm as the heating band used as the carbon fiber parameters can be used as a reference value in practical applications. The model of freezing interface between ice layer and road surface is given. The formula of heat generation rate under microwave irradiation is put forward. The influence of carbon fiber content and emulsified asphalt content on microwave heat generation rate is studied, and the influence mechanism is analyzed. The results showed that when Vcf=0.4%~ was 1.0 and irradiation time was 30 s, microwave heat generation rate was the best, among which Vcf=0.6% critical heat generation rate K0 was the best. The heat generation rate was maintained at a higher level under the dosage of AE/C=5% and AE/C=10%, which were 504.4 J / s ~ (-1) J / s ~ (478.1) J / s, respectively. The results of laboratory research and computer simulation show that the deicing effect is ideal.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U414;U416.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李炎鋒;武海琴;王貫明;朱濱;石勃偉;;發(fā)熱電纜用于路面融雪化冰的實(shí)驗(yàn)研究[J];北京工業(yè)大學(xué)學(xué)報(bào);2006年03期

2 蔡浩田;;具有融雪功能的連續(xù)碳纖維電熱混凝土路板的研制[J];玻璃鋼/復(fù)合材料;2009年02期

3 ;Smart Behavior of Carbon Fiber Reinforced Cement-based Composite[J];Journal of Materials Science & Technology;2003年03期

4 孫明清,張暉,李卓球,孫世金,程林;CFRC機(jī)敏混凝土中碳纖維的分散性研究[J];混凝土與水泥制品;2004年05期

5 王闖;李克智;李賀軍;;短碳纖維在不同分散劑中的分散性[J];精細(xì)化工;2007年01期

6 丁金波;董威;;表面粗糙度對(duì)冰凍黏強(qiáng)度影響試驗(yàn)研究[J];航空發(fā)動(dòng)機(jī);2012年04期

7 陳拴發(fā);劉狀壯;邢明亮;夏慧蕓;;融雪抑冰材料疏水性能影響因素研究[J];建筑材料學(xué)報(bào);2013年06期

8 白�；�,姬東方,鄭立寶;水泥混凝土輪跡道路設(shè)計(jì)方法初探[J];西部探礦工程;2003年11期

9 焦生杰;唐相偉;高子渝;王強(qiáng);;微波除冰效率關(guān)鍵技術(shù)研究[J];中國公路學(xué)報(bào);2008年06期

10 王菱,謝賢群,蘇文,郭學(xué)兵;中國北方地區(qū)50年來最高和最低氣溫變化及其影響[J];自然資源學(xué)報(bào);2004年03期

相關(guān)博士學(xué)位論文 前2條

1 黃勇;路面融雪化冰及太陽輻射吸熱研究[D];吉林大學(xué);2010年

2 王志;基于交通荷載橫向重分布的瀝青路面預(yù)防性養(yǎng)護(hù)新技術(shù)研究[D];長安大學(xué);2012年

本文編號(hào)：2428438