本文選題：微瀝青碎石　切入點(diǎn)：反射裂縫　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：當(dāng)前，半剛性基層瀝青路面是我國(guó)高等級(jí)公路的主要形式，但是在使用過(guò)程中，容易出現(xiàn)由于半剛性基層開(kāi)裂而導(dǎo)致的瀝青面層反射裂縫，嚴(yán)重影響道路使用壽命。如何抑制半剛性基層瀝青路面的反射裂縫已經(jīng)成為當(dāng)前研究的熱點(diǎn)問(wèn)題。 目前國(guó)內(nèi)外采取的處置方法，尚不能有效解決反射裂縫問(wèn)題。論文在國(guó)內(nèi)外現(xiàn)有處置措施的基礎(chǔ)上，首次提出微瀝青碎石混合料作為瀝青面層與半剛性基層之間的過(guò)渡層，以達(dá)到抑制反射裂縫的作用。針對(duì)微瀝青碎石技術(shù)特點(diǎn)，提出了原材料基本性能要求。采用多級(jí)嵌擠理論，得出微瀝青碎石級(jí)配。采用黏聚性試驗(yàn)，確定其最小瀝青用量。采用析漏試驗(yàn)，確定其最大瀝青用量。在瀝青用量范圍內(nèi)，綜合考慮微瀝青碎石體積指標(biāo)與CBR值，確定微瀝青碎石最佳瀝青用量，最終確定微瀝青碎石配合比。通過(guò)抗變形性能、水穩(wěn)定性能、黏聚性能對(duì)配合比進(jìn)行驗(yàn)證，并建議微瀝青碎石路用性能評(píng)價(jià)指標(biāo)。對(duì)微瀝青碎石回彈模量和滲水特性展開(kāi)研究，推薦了回彈模量和滲水性能評(píng)價(jià)方法。通過(guò)鋪筑試驗(yàn)路，提出微瀝青碎石施工工藝控制要點(diǎn)。對(duì)試驗(yàn)路的觀(guān)測(cè)表明，微瀝青碎石過(guò)渡層可有效抑制反射裂縫的出現(xiàn)。 研究成果將推動(dòng)微瀝青碎石的應(yīng)用與推廣，有助于解決半剛性基層瀝青路面反射裂縫問(wèn)題及由此引發(fā)的各種病害，從而減小養(yǎng)護(hù)成本，延長(zhǎng)道路使用壽命，，具有重要的工程應(yīng)用前景及巨大的社會(huì)經(jīng)濟(jì)效益。
[Abstract]:At present, the asphalt pavement with semi-rigid base is the main form of high grade highway in our country, but in the process of using, it is easy to appear the reflection crack of asphalt surface caused by the cracking of semi-rigid base. How to suppress the reflection crack of semi-rigid base asphalt pavement has become a hot issue in current research. At present, the problem of reflection crack can not be effectively solved by the disposal methods adopted at home and abroad. On the basis of the existing disposal measures at home and abroad, it is the first time that the micro-asphalt macadam mixture is proposed as the transition layer between the asphalt surface layer and semi-rigid base course. In order to restrain the reflection crack, according to the technical characteristics of micro-asphalt macadam, the basic performance requirements of raw materials are put forward. The gradation of micro-asphalt macadam is obtained by adopting multi-stage embossing theory, and the agglomeration test is adopted. In the range of asphalt dosage, considering the volume index of micro-asphalt macadam and CBR value, the optimum asphalt dosage of micro-asphalt macadam is determined. Finally, the mix ratio of micro-asphalt macadam is determined. The mix ratio is verified by deformation resistance, water stability and agglomeration, and the evaluation index of road performance of micro-asphalt macadam is suggested. The resilient modulus and water permeation characteristics of micro-asphalt macadam are studied. The evaluation method of resilience modulus and seepage performance is recommended. The key points of construction technology control of micro-asphalt macadam are put forward by paving test road. The observation of test road shows that the transition layer of micro-asphalt macadam can effectively restrain the occurrence of reflection crack. The research results will promote the application and popularization of micro-asphalt macadam, and help to solve the problem of reflection crack of semi-rigid base asphalt pavement and all kinds of diseases caused therefrom, thus reducing the maintenance cost and prolonging the service life of the road. It has an important prospect of engineering application and great social and economic benefits.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U414

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