發(fā)布時(shí)間：2019-05-09 02:37

【摘要】：在半剛性基層結(jié)構(gòu)中,水泥穩(wěn)定粒料基層可供穩(wěn)定的材料種類很多,選擇面更加寬廣,同時(shí)具有較好的水穩(wěn)性和抗凍性,還具有一定的強(qiáng)度、剛度和整體性。在路面的使用過程中彈性變形較小,使用承載力高,年限長,所以在河北省乃至全國范圍內(nèi)被廣泛的采用。但是,現(xiàn)有半剛性基層瀝青路面有些路段使用不足5年就必須進(jìn)行大修,其主要病害是路面開裂、高溫車轍和水損害等早期破壞現(xiàn)象使其使用壽命大大縮短。半剛性基層路面的開裂,不僅降低了道路的服務(wù)水平,還破壞了路面結(jié)構(gòu)的整體性和連續(xù)性。本課題研究的目的是采用新型的超纖維技術(shù)來提高瀝青路面水泥穩(wěn)定級配碎石基層的抗裂性能,以有效地減少甚至消除半剛性基層的裂縫破壞,改善半剛性基層瀝青路面因發(fā)射裂縫而引起的早期破壞,延長半剛性基層瀝青路面的使用壽命。課題首先對纖維復(fù)合技術(shù)進(jìn)行了介紹,分析了超纖維改性機(jī)理,然后進(jìn)行了超纖維水泥穩(wěn)定碎石技術(shù)性能的研究。通過在張石高速公路張家口段部分路段進(jìn)行試驗(yàn),分別測試了超纖維水泥穩(wěn)定級配碎石強(qiáng)度、剛度和抗裂性能等參數(shù)。試驗(yàn)結(jié)果表明:通過在水泥穩(wěn)定級配碎石中摻入適量超纖維,大幅度的提高了半剛性基層的強(qiáng)度、剛度和抗裂性,使半剛性基層能夠壽命更長,質(zhì)量更好。
[Abstract]:In the semi-rigid base structure, there are many kinds of materials available for stable cement stabilized grain base, the selection surface is wider, at the same time, it has better water stability and frost resistance, and also has certain strength, stiffness and integrity. In the process of pavement use, the elastic deformation is small, the service bearing capacity is high, and the service life is long, so it is widely used in Hebei Province and even the whole country. However, some sections of semi-rigid base asphalt pavement must be repaired in less than 5 years. The main diseases are pavement cracking, high temperature rut and water damage, which greatly shorten its service life. The cracking of semi-rigid base pavement not only reduces the service level of road, but also destroys the integrity and continuity of pavement structure. The purpose of this study is to improve the crack resistance of asphalt pavement cement stabilized graded macadam base by using new hyperfiber technology, so as to effectively reduce or even eliminate the crack failure of semi-rigid base. Improve the early damage of semi-rigid base asphalt pavement caused by launching cracks and prolong the service life of semi-rigid base asphalt pavement. Firstly, the fiber composite technology is introduced, the mechanism of super fiber modification is analyzed, and then the technical performance of super fiber cement stabilized crushed stone is studied. Through some tests on Zhangjiakou section of Zhangshi expressway, the strength, stiffness and crack resistance of super fiber cement stabilized graded crushed stone were tested respectively. The test results show that the strength, stiffness and crack resistance of semi-rigid base are greatly improved by adding proper amount of superfiber into cement stabilized graded macadam, and the service life and quality of semi-rigid base are longer and better.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.214

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相關(guān)期刊論文 前1條

1 馬殙;王曉曼;李超;李志強(qiáng);劉松濤;;相變材料在瀝青混凝土路面中的應(yīng)用前景分析[J];公路;2009年12期

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本文編號：2472410