【摘要】：現(xiàn)代交通交通密度大、軸載重,致使裂縫、車轍、坑槽等早期病害現(xiàn)象明顯,嚴(yán)重影響路面使用壽命,在瀝青混合料中添加纖維來提高其路用性能是目前常用的方法。纖維瀝青混合料是一種高品質(zhì)的復(fù)合型材料。這種材料既可以阻止路面開裂,又能減少車轍的出現(xiàn),還可彌補(bǔ)瀝青低溫脆性不足等特點(diǎn),明顯改善瀝青混合料的路用性能,延長路面使用壽命。鑒于纖維能夠有效提高瀝青混合料路用性能這一優(yōu)點(diǎn),選用玄武巖纖維作為主要研究對象,以SMA瀝青混合料為依托,對基于基質(zhì)瀝青平臺和改性瀝青平臺的纖維瀝青混合料的性質(zhì)進(jìn)行了性能比對分析。利用車轍試驗(yàn)、小梁彎曲試驗(yàn)和凍融劈裂試驗(yàn),研究了玄武巖纖維瀝青混合料的高溫穩(wěn)定性、低溫抗裂性和水穩(wěn)定性等路用性能。分析結(jié)果表明瀝青混合料的最佳油石比和纖維摻量是兩個較重要的影響因素。研究成果為玄武巖纖維型纖維的推廣應(yīng)用及纖維瀝青混合料的設(shè)計(jì)和施工提供了試驗(yàn)依據(jù)。本文主要從以下五個方面對玄武巖纖維瀝青混合料進(jìn)行了研究:(1)對瀝青混合料所用原材料進(jìn)行了性能試驗(yàn)研究,設(shè)計(jì)三種不同的礦料級配,通過試驗(yàn)確定試驗(yàn)級配。(2)通過馬歇爾試驗(yàn)法,確定不同摻量下的玄武巖纖維SMA-13的最佳油石比,建立一個纖維摻量與最佳油石比的對應(yīng)關(guān)系。(3)比較了基質(zhì)瀝青和SBS改性瀝青在不同玄武巖纖維摻入量情況下,對瀝青三大指標(biāo)性能的影響。(4)纖維最佳摻量的研究。根據(jù)混合料的高溫車轍試驗(yàn)和低溫小梁彎曲試驗(yàn)等,研究確定了玄武巖纖維在瀝青混合料中的最佳摻量,并確定了在最佳纖維摻量情況下的最佳瀝青用量。(5)玄武巖纖維瀝青混合料路用性能分析。通過室內(nèi)試驗(yàn)方法,研究了玄武巖纖維在SMA-13中的路用性能。并在高溫、低溫和水穩(wěn)定性等方面路用性能進(jìn)行了對比分析。研究結(jié)果顯示,玄武巖纖維對瀝青混合料路用性能具有更大的改善作用。通過試驗(yàn)路用性能的研究,證明了玄武巖纖維瀝青混合料良好的使用效果和推廣應(yīng)用價值。
[Abstract]:Modern traffic density, axle load, cracks, ruts, potholes and other early disease phenomenon is obvious, which seriously affects the pavement service life. Adding fiber to asphalt mixture to improve its road performance is a common method at present. Fiber asphalt mixture is a kind of high quality compound material. This kind of material can not only prevent the pavement cracking, but also reduce the appearance of rutting, make up for the shortage of low temperature brittleness of asphalt, improve the pavement performance of asphalt mixture and prolong the pavement service life. In view of the advantage that fiber can effectively improve the pavement performance of asphalt mixture, basalt fiber is chosen as the main research object, and SMA asphalt mixture is used as the basis. The properties of fiber asphalt mixture based on matrix asphalt platform and modified asphalt platform are analyzed. Using rutting test, trabecular bending test and freeze-thaw splitting test, the high temperature stability, low temperature crack resistance and water stability of basalt fiber asphalt mixture were studied. The results show that the optimum asphalt mixture ratio and fiber content are two important factors. The research results provide experimental basis for the popularization and application of basalt fiber and the design and construction of fiber asphalt mixture. This paper mainly studies the basalt fiber asphalt mixture from the following five aspects: (1) the performance of the raw materials used in the asphalt mixture is studied, and three kinds of mineral aggregate gradation are designed. The test gradation is determined by experiment. (2) by Marshall test, the optimum ratio of oil to stone for basalt fiber SMA-13 with different content is determined. A corresponding relationship between the fiber content and the optimum asphalt ratio was established. (3) the effects of matrix asphalt and SBS modified asphalt on the performance of asphalt under different basalt fiber content were compared. (4) the optimum fiber content was studied. According to the high temperature rutting test and low temperature trabecular bending test of mixture, the optimum content of basalt fiber in asphalt mixture is determined. The optimum asphalt content under the optimum fiber content is determined. (5) Road performance analysis of basalt fiber asphalt mixture. The road performance of basalt fiber in SMA-13 was studied by laboratory test. The performance of high temperature, low temperature and water stability were compared and analyzed. The results show that basalt fiber can improve the pavement performance of asphalt mixture. It is proved that the basalt fiber asphalt mixture has good application effect and application value through the research of road performance.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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