【摘要】：近幾年陜西省在修筑高速公路時(shí)，越來越多的采用SMA結(jié)構(gòu)。然而，在SMA路面的應(yīng)用過程中，VMA值的大小應(yīng)如何選取令諸多道路工作者感到困惑，是該直接套用規(guī)范還是根據(jù)項(xiàng)目實(shí)際情況對(duì)指標(biāo)要求進(jìn)行適當(dāng)調(diào)整？調(diào)整的范圍應(yīng)該是多少？調(diào)整后SMA的路用性能又將如何？這一系列問題使大家無所適從。為此開展基于VMA的SMA混合料技術(shù)研究是十分有必要的。 論文首先通過對(duì)現(xiàn)有規(guī)范和相關(guān)成果的分析，，得出了影響VMA值的主要因素及VMA對(duì)SMA混合料路用性能影響的規(guī)律。其次通過室內(nèi)試驗(yàn)，研究了各項(xiàng)影響因素對(duì)VMA值的影響程度及VMA隨各影響因素變化時(shí)的增減規(guī)律；研究了當(dāng)VMA隨著纖維類型、油石比、集料吸水率和混合料級(jí)配變化時(shí)，SMA混合料高低溫性能和水穩(wěn)定性等路用性能的變化規(guī)律。最后通過對(duì)陜西省的氣候條件和交通荷載的具體分析，初步提出了陜西省各地區(qū)的最小VMA建議值范圍。再通過理論分析，推導(dǎo)出了由有效瀝青膜厚度DA、集料的比表面積SA和礦料的合成毛體積相對(duì)密度rsb以及空隙率VV四個(gè)參數(shù)組成的VMA計(jì)算公式，計(jì)算出陜北、關(guān)中和陜南三地區(qū)的最小VMA建議值。綜合論文研究成果，最終提出陜西省各地區(qū)的最小VMA建議值。通過陜北地區(qū)鋪筑SMA-13試驗(yàn)路，驗(yàn)證了本文所定的最小VMA建議值在陜北地區(qū)可行性。
[Abstract]:In recent years, in Shaanxi Province, more and more SMA structures are used in highway construction. However, in the process of SMA pavement application, how to select the value of VMA puzzles many road workers, should it be directly applied to the specification or according to the actual situation of the project to make appropriate adjustments to the index requirements? What should be the scope of the adjustment? What will be the road performance of the adjusted SMA? This series of questions baffled everyone. Therefore, it is very necessary to carry out the research of SMA mixture technology based on VMA. Firstly, through the analysis of the existing specifications and related achievements, the main factors affecting the VMA value and the rule of the influence of VMA on the performance of SMA mixture are obtained. Secondly, the influence degree of each influence factor on VMA value and the increasing and decreasing rule of VMA with each influence factor were studied through the laboratory experiment. When VMA varies with fiber type, oil / stone ratio, aggregate water absorption and mixture gradation, the high and low temperature performance and water stability of SMA mixture are studied. Finally, through the concrete analysis of the climatic conditions and traffic loads in Shaanxi Province, the range of minimum VMA values proposed in each area of Shaanxi Province is preliminarily put forward. Based on the theoretical analysis, the VMA formula composed of the specific surface area (SA) of the effective asphalt film thickness DA, aggregate, the synthetic gross volume relative density (rsb) of the mineral aggregate and the void ratio (VV) of the aggregate are derived, and the north of Shaanxi Province is calculated. The minimum recommended value of VMA in Guanzhong and southern Shaanxi. According to the research results of this paper, the minimum VMA recommendation value of Shaanxi Province is finally put forward. The feasibility of the minimum recommended value of SMA-13 in the north of Shaanxi Province is verified by paving the VMA test road in the north of Shaanxi Province.
【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
【分類號(hào)】：U414

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