本文選題：道路工程　切入點：阻燃劑　出處：《蘭州交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著瀝青路面在公路隧道工程建設(shè)中大量使用，而瀝青由于其易燃性也正越來越多的引起各國專家重視。因此，為了解決瀝青的易燃性問題，本文通過查閱、瀏覽大量文獻資料，制備出一種新型無機復(fù)合阻燃劑，并研究了阻燃劑的添加對瀝青性能影響和對其混合料的阻燃性能與路用性能的影響。 本文首先將氫氧化鎂、三聚氰胺、聚磷酸銨和鈦酸酯四種原料按照三水平四因素初步設(shè)計正交試驗表L9（34），制備出九組不同配方的阻燃劑中間體（MAM），并用鈦酸酯用量占中間體MAM質(zhì)量的3%到7%，設(shè)定鈦酸酯的5個不同用量，分別對中間體（MAM）表面改性得到MAM-Ti，然后對MAM-Ti進行吸油率、活化指數(shù)性能檢測，確定出50~200目范圍的鈦酸酯最佳用量為6%左右。 其次，根據(jù)九組原料配方制備了九組不同配方的阻燃劑MAM-Ti，并將制備出的MAM-Ti按照瀝青用量的4%、6%、8%、10%加入瀝青中，用高速剪切機剪切半小時左右制備出36組阻燃瀝青，對36組阻燃瀝青進行瀝青性能常規(guī)試驗及極限氧指數(shù)試驗。并任意選取一定摻量的阻燃瀝青試驗結(jié)果（本文選取6%摻量），結(jié)合考慮其吸油率及活化指實驗值，利用多指標正交試驗設(shè)計分析法對其進行綜合評分研究，并從九組不同配方中選出最優(yōu)阻燃劑配方3#試驗；根據(jù)36組阻燃瀝青試驗結(jié)果，利用圖形分析法得出阻燃劑最佳摻量為5%。 再次，采用熱拌瀝青混合料成型法設(shè)計混合料配合比，利用礦料分形分布特征進行配合比驗證，并對阻燃劑用量占瀝青質(zhì)量的0%、4%、6%、8%、10%的幾個摻量，按照阻燃劑內(nèi)加法和外加法兩種方法成型馬歇爾試件，分別測定試件的毛體積密度、流值、穩(wěn)定度、空隙率、礦料間隙率、飽和度等指標，根據(jù)試驗結(jié)果及圖形分析得出在阻燃劑摻量從0%到10%的變化過程中，阻燃劑的最佳添加方式為外加法。然后通過采用比較法，對普通瀝青混合料、市面上大量銷售的某廠家出產(chǎn)的阻燃劑A和自主研發(fā)的阻燃劑MAM-Ti三種混合料的路用性能進行了研究，由結(jié)果可知，三種混合料的高溫性能、低溫性能、水穩(wěn)性能均滿足規(guī)范要求，，但MAM-Ti水穩(wěn)性能表現(xiàn)略低。最后對三種混合料，應(yīng)用比較法從混合料試件的燃燒時間、質(zhì)量損失、表面溫度、殘留穩(wěn)定度、燃燒前后動穩(wěn)定度變化幾個方面研究了其燃燒性能，從試驗結(jié)果可知，阻燃瀝青混合料阻燃性能高于普通瀝青混合料，且MAM-Ti阻燃瀝青混合料阻燃性能優(yōu)于A阻燃瀝青混合料。 最后，根據(jù)對阻燃劑研制過程中的技術(shù)特點和市場調(diào)查，通過比較分析得出本文研制的MAM-Ti阻燃劑具有重要的現(xiàn)實意義，可以考慮在隧道路面鋪裝中使用。
[Abstract]:With the extensive use of asphalt pavement in highway tunnel construction, more and more experts from all over the world pay attention to asphalt because of its flammability. Therefore, in order to solve the problem of flammability of asphalt, this paper makes reference to it. A new inorganic composite flame retardant was prepared by reviewing a large amount of literature, and the effects of the addition of flame retardant on the asphalt performance, the flame retardancy and the road performance of the mixture were studied. In this paper, magnesium hydroxide, melamine, Four kinds of raw materials, ammonium polyphosphate and titanate, were preliminarily designed according to the three water and four factors orthogonal test table L9N 34. Nine groups of flame retardant intermediates were prepared. The amount of titanate accounted for 3% to 7% of the mass of the intermediate MAM, and the titanate was set up. Of 5 different doses, The surface modification of the intermediate (MAM) was carried out to obtain MAM-Ti.The oil absorption rate and activation index of MAM-Ti were measured, and the optimum amount of titanate was determined to be about 6% in the range of 50 ~ 200mesh. Secondly, according to nine groups of raw material formulations, nine groups of flame retardant MAM-TiM were prepared, and 36 groups of flame retardant asphalts were prepared by using high-speed shearing machine for about half an hour. In this paper, 36 groups of flame retardant asphalt were tested by conventional asphalt performance test and limit oxygen index test, and the test results of flame retardant asphalt with a certain amount of flame retardant asphalt were randomly selected. (in this paper, the oil absorption rate and activation index of flame retardant asphalt were taken into account by taking into account the oil absorption rate and activation index test value. The comprehensive score was studied by the method of multi-index orthogonal design, and the optimum flame retardant formula was selected from nine groups of different formulations, and according to the test results of 36 groups of flame-retardant asphalt, the optimum flame retardant formulation was selected from nine groups of different formulations. The optimum content of flame retardant was obtained by graphic analysis method. Thirdly, the mixture ratio is designed by the hot mix asphalt mixture molding method, the mix ratio is verified by the fractal distribution characteristics of the mineral aggregate, and the quantity of the flame retardant used to account for the quantity of the asphalt is 0 / 4 / 10%. Marshall specimen was formed by internal addition and addition of flame retardant. The bulk density, flow value, stability, void ratio, mineral clearance rate and saturation were measured, respectively. According to the test results and graphic analysis, it is concluded that the best addition method of flame retardant is the addition method in the course of the change of flame retardant content from 0% to 10%. The road performance of three kinds of mixtures, flame retardant A and independently developed flame retardant MAM-Ti, which are widely sold in a certain factory on the market, have been studied. From the results, we can see that the high temperature performance and low temperature performance of the three kinds of mixtures, The water stability performance of MAM-Ti is slightly lower than that of the standard. Finally, the combustion time, mass loss, surface temperature, residual stability of the three mixtures are analyzed by comparing the three kinds of mixtures, including the combustion time, the mass loss, the surface temperature, the residual stability, and so on. According to the experimental results, the flame retardancy of flame retardant asphalt mixture is higher than that of ordinary asphalt mixture, and the flame retardant property of MAM-Ti flame retardant asphalt mixture is better than that of A flame retardant asphalt mixture. Finally, according to the technical characteristics and market investigation in the process of developing flame retardant, it is concluded that the MAM-Ti flame retardant developed in this paper has important practical significance and can be used in tunnel pavement pavement.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414

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