本文選題：細(xì)觀結(jié)構(gòu) + 回收瀝青混合料��； 參考：《吉林大學(xué)》2014年碩士論文

【摘要】：近些年來，瀝青混合料的細(xì)觀結(jié)構(gòu)成為了研究熱點(diǎn)，但主要研究的是普通瀝青混合料。而隨著經(jīng)濟(jì)的發(fā)展，地球上資源的減少，材料的回收利用引起了人們的重視。在道路工程界，目前研究較多的環(huán)保型瀝青混合料是多孔性瀝青混合料PAC，回收瀝青混合料RAC和添加有廢舊爐渣的瀝青混合料DGAC（BOF）。本文依托臺(tái)灣成功大學(xué)土木所交通組的項(xiàng)目，嘗試從細(xì)觀方面研究環(huán)保型瀝青混合料PAC，RAC和DGAC（BOF），并建立細(xì)觀參數(shù)與宏觀性能之間的關(guān)系。本文的主要內(nèi)容如下： 1.向量幅值Δ與宏觀性能的關(guān)系研究 根據(jù)公式=1002n(in=1sin2θi)+(ncos2θi2i=1)計(jì)算向量幅值。結(jié)果表明，不管是實(shí)驗(yàn)室試體還是現(xiàn)地鉆心試體，Δ越大，車轍深度越大。因?yàn)棣ぴ酱�，集料傾向越統(tǒng)一，集料越不均勻。PAC和DGAC（BOF）的抗車轍能力優(yōu)于普通密級(jí)配。RAC（40%）車轍深度雖然大于HMA，，但還是符合規(guī)范要求，所以鋪筑RAC還是有一定的意義。 對(duì)于現(xiàn)地鉆心試體DGAC（NA）和DGAC（BOF），回彈模量和間接拉伸強(qiáng)度隨著Δ的增大而減小。而且在這些方面，DGAC（BOF）的性能都優(yōu)于普通密級(jí)配。 2.集料分布的均勻性研究 將實(shí)驗(yàn)室三種級(jí)配混合料的截面分為上下兩部分，通過測量兩部分集料粒徑在各范圍內(nèi)的頻數(shù)差來評(píng)價(jià)實(shí)驗(yàn)室三種級(jí)配的均勻性，用k表示。結(jié)果表明，PAC和HMA分布較均勻，標(biāo)準(zhǔn)差較小，而RAC（40%）由于含有較多小粒徑的舊料，標(biāo)準(zhǔn)差較大。 3.空隙分布研究 本文主要使用Image-Pro Plus6.0軟件進(jìn)行圖像處理，但由于空隙與膠漿灰度比較接近，用軟件中的功能提取的不夠完整，所以自編程序提取PAC，HMA和RAC（40%）的空隙率。結(jié)果表明，三者空隙率隨深度的變化趨勢都是先變大再變小，都是中部的空隙率較大。 4.圖像級(jí)配研究 根據(jù)每檔集料等效直徑在各范圍內(nèi)的占比，畫出級(jí)配曲線。引入實(shí)際篩分與圖像級(jí)配的相對(duì)誤差Di來評(píng)價(jià)RAC（40%），HMA和PAC。結(jié)果表明，用圖像級(jí)配方法分析密級(jí)配混合料與實(shí)際篩分曲線最接近，但對(duì)于開級(jí)配PAC，由于平均誤差較大，分析效果不理想。 本文意在分析幾種環(huán)保型瀝青混合料PAC，RAC（40%）和DGAC（BOF）的細(xì)觀結(jié)構(gòu)，希望通過研究細(xì)觀結(jié)構(gòu)能預(yù)測混合料的宏觀性能。
[Abstract]:In recent years, the meso-structure of asphalt mixture has become a research hotspot, but the main research is ordinary asphalt mixture. With the development of economy and the decrease of resources on the earth, people pay more attention to the recycling of materials. In the field of road engineering, the environmental friendly asphalt mixture studied at present is porous asphalt mixture (PAC), recycled asphalt mixture (RAC) and asphalt mixture with waste slag (DGA). Based on the project of traffic group of civil engineering institute of Chengcheng University of Taiwan, this paper attempts to study the environmental protection asphalt mixture PACRAC and DGAC / BOF from the view of meso, and to establish the relationship between the meso-parameters and the macroscopic performance. The main contents of this paper are as follows: 1. Study on the relationship between Vector amplitude 螖 and macroscopic performance The amplitude of the vector is calculated according to the formula of 1002ncn ~ (1 sin2 ~ (2 胃) / ncos2 ~ (胃 ~ (2) I ~ (-1). The results show that the greater 螖 is, the greater the rutting depth is. Because the larger 螖 is, the more uniform the aggregate tendency is, and the more uneven the aggregate. PAC and DGACU BOF) have better rutting resistance than the conventional dense gradation. RAC40) rutting depth is higher than HMA, but it still conforms to the specification, so it is of certain significance to lay out RAC. For DGAC NA) and DGAC BOFN, the modulus of springback and the indirect tensile strength decrease with the increase of 螖. Moreover, the performance of DGAC BofF is superior to that of ordinary dense gradation in these aspects. 2. Study on the uniformity of aggregate Distribution The cross section of three kinds of laboratory gradation mixture is divided into two parts, and the uniformity of the three kinds of gradation in laboratory is evaluated by measuring the frequency difference of the particle size of the two parts in each range, expressed in k. The results show that the distribution of HMA and HMA is more uniform, and the standard deviation is smaller, but RAC40) the standard deviation is larger because it contains more used materials with small particle size. 3. Study on void distribution In this paper, Image-Pro Plus6.0 software is mainly used for image processing, but because the void is close to the grayscale of the paste and the function of the software is not completely extracted, the voidage ratio of PACMA-HMA and RAC40) is extracted by a self-programmed program. The results show that the three voids tend to increase first and then decrease with the depth, and the central voidage is larger. 4. Image gradation study The gradation curve is drawn according to the ratio of the equivalent diameter of each aggregate in each range. The relative error (Di) of actual sieving and image gradation is introduced to evaluate the Rac _ (40) HMA and PAC. The results show that the image gradation method is the closest to the actual screening curve, but for open grading PAC, the analysis effect is not ideal because of the large average error. The purpose of this paper is to analyze the meso structure of several kinds of environmental friendly asphalt mixture PACRAC40) and DGACU BOF), and hope that the macroscopic performance of the mixture can be predicted by studying the meso structure.
【學(xué)位授予單位】：吉林大學(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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