本文選題：集料　切入點：巖性　出處：《吉林大學(xué)》2014年碩士論文

【摘要】：材料的組成和結(jié)構(gòu)決定材料的性能，特別是在瀝青混合料中用量最大的集料，不僅對瀝青混合料的性能影響重大，而且對工程造價的影響也極為關(guān)鍵。公路路面病害中很多損壞現(xiàn)象是與集料性能密切相關(guān)的，集料性能和質(zhì)量不高，是瀝青路面出現(xiàn)破壞現(xiàn)象（如車轍、松散剝落、裂縫等）的主要原因之一，因此，研究瀝青混合料集料的性能特點是非常重要的。但是由于設(shè)備、理論和方法的欠缺，目前的研究多數(shù)停留在宏觀指標(biāo)（如壓碎值、磨耗值、棱角性等）上，，對集料的巖性和微觀特征領(lǐng)域沒有深入涉及。通過控制目前提出的集料宏觀技術(shù)指標(biāo)，公路瀝青路面依然存在各種破壞現(xiàn)象，因此目前集料的宏觀技術(shù)指標(biāo)并不完善，在研究更多的集料宏觀技術(shù)指標(biāo)的同時，應(yīng)該將集料的微觀特性重視起來。 本文采用X射線衍射分析技術(shù)和掃描電鏡（SEM）及能譜儀（EDS）分析技術(shù)對集料的巖性和微觀特征開展研究，所選集料巖樣均來自內(nèi)蒙省道308線小河西至上都段一級公路項目底面層的3種主要集料，分別為構(gòu)造角礫巖、石英鈉長巖和玄武巖。本論文按照現(xiàn)有行業(yè)規(guī)范對集料的壓碎值、洛杉磯磨耗值、砂當(dāng)量、棱角性、與瀝青粘附性等技術(shù)指標(biāo)進行試驗，得出所選的這3種集料的宏觀技術(shù)指標(biāo)性能。最后根據(jù)工程最佳配合比設(shè)計，分別對所選3種集料構(gòu)成的瀝青混合料的路用性能進行試驗分析。 本文采用的X射線衍射技術(shù)是利用X射線衍射儀對巖樣進行試驗，獲取巖樣中晶體的X射線衍射圖譜，然后利用XRD數(shù)據(jù)處理軟件來分析巖樣的礦物組成及質(zhì)量分?jǐn)?shù)、結(jié)晶度和晶粒尺寸，通過與集料的宏觀技術(shù)指標(biāo)比對，探討集料巖石中礦物成分、結(jié)構(gòu)及構(gòu)造與集料宏觀路用指標(biāo)之間的對應(yīng)關(guān)系。 掃描電鏡（SEM）主要分析巖樣的表面微觀特征、粗糙度信息以及觀察粘附性試驗，然后用Matlab軟件計算巖樣粗糙度。本文首次在掃描電鏡實驗過程中，通過定量的方法對瀝青與集料的粘附性等級進行評價。利用Matlab軟件對掃描電鏡下的灰度圖片進行數(shù)字化轉(zhuǎn)化，定量計算集料表面粗糙度。探討集料微觀特征與瀝青混合料路用性能指標(biāo)的對應(yīng)關(guān)系。 研究發(fā)現(xiàn)集料中長石的性質(zhì)能反映巖石的壓碎值，晶粒大小與磨耗值反相關(guān)，晶粒越大，磨耗值越小，集料越耐磨。通過對粗糙度的測定，可以評價出集料對瀝青混合料的凍融劈裂抗水損害性能，即水穩(wěn)定性。因此集料的表面粗糙度可以作為瀝青混合料水穩(wěn)定性的微觀評價指標(biāo)。
[Abstract]:The composition and structure of the material determine the performance of the material, especially the aggregate with the largest amount in the asphalt mixture, which not only has a great influence on the performance of the asphalt mixture, but also on the construction cost.Many damage phenomena in highway pavement diseases are closely related to the aggregate performance. The aggregate performance and quality are not high, which is one of the main causes of asphalt pavement damage (such as rutting, loose spalling, crack, etc.), therefore,It is very important to study the performance of asphalt mixture aggregate.However, due to the lack of equipment, theory and methods, most of the current studies remain on macro indicators (such as crushing value, wear value, angularity, etc.), and there is no in-depth study on lithology and microscopic characteristics of aggregates.By controlling the macro technical index of aggregate, there are still various kinds of damage phenomena in highway asphalt pavement. Therefore, the macro technical index of aggregate is not perfect at present, while studying more macro technical indexes of aggregate,The microscopic characteristics of aggregates should be taken seriously.In this paper, the lithology and microcosmic characteristics of aggregates are studied by means of X-ray diffraction analysis, scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS).The selected aggregate rock samples are all from three kinds of main aggregates in the bottom layer of the first class highway project of Xiaoxi Chaodu section along the 308 line of Inner Mongolia Provincial Road, which are structural breccia, quartz sodium feldspar and basalt, respectively.In this paper, according to the existing industry specifications, the aggregate crushing value, Los Angeles wear value, sand equivalent, angularity, adhesion to asphalt and other technical indicators are tested, and the macro technical performance of the three kinds of aggregate is obtained.Finally, according to the design of optimum mix ratio of engineering, the road performance of asphalt mixture composed of three kinds of aggregates is tested and analyzed separately.The X-ray diffraction technique used in this paper is to test rock samples by using X-ray diffractometer, to obtain X-ray diffraction patterns of crystals in rock samples, and then to analyze the mineral composition and mass fraction of rock samples by using XRD data processing software.By comparing the crystallinity and grain size with the macroscopical technical index of aggregate, the corresponding relationship between mineral composition, structure and structure of aggregate rock and macroscopical road index of aggregate is discussed.Scanning Electron Microscopy (SEM) is used to analyze the surface microcosmic characteristics, roughness information and adhesion test of rock samples. Then the roughness of rock samples is calculated by Matlab software.In this paper, the degree of adhesion between asphalt and aggregate is evaluated by quantitative method in the process of SEM experiment for the first time.The grayscale image of scanning electron microscope was digitally transformed by Matlab software, and the surface roughness of aggregate was calculated quantitatively.The relationship between the microscopic characteristics of aggregate and the road performance index of asphalt mixture is discussed.It is found that the properties of feldspar in aggregate can reflect the crushing value of rock, and the grain size is inversely related to the wear value. The larger the grain size is, the smaller the wear value is, and the more wear-resistant the aggregate is.By measuring the roughness, the water stability of asphalt mixture can be evaluated by the freezing and thawing cracking resistance of aggregate to asphalt mixture.Therefore, the surface roughness of aggregate can be used as a micro evaluation index of asphalt mixture water stability.
【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】：2014
【分類號】：U414

【參考文獻】

相關(guān)期刊論文 前10條

1 劉濤;李智;孫楊勇;鐘汝標(biāo);;瀝青路面粗集料微觀紋理評價方法研究[J];重慶交通大學(xué)學(xué)報(自然科學(xué)版);2012年03期

2 馮建;周晨波;于文英;許泓_g;董燕;;基于灰度共生矩陣的表面粗糙度研究[J];光學(xué)與光電技術(shù);2007年02期

3 于娜;;某工程中巖石成分與其力學(xué)性質(zhì)關(guān)系淺析[J];廣州建筑;2011年04期

4 陳先華;陳勝霞;黃曉明;楊軍;B.Steinauer;;瀝青路面的磨光研究:從宏觀到微觀尺度[J];中外公路;2013年02期

5 初秀民;李永;嚴(yán)新平;萬劍;;基于微觀形貌特征的瀝青路面抗滑性能評價研究進展[J];交通與計算機;2007年01期

6 周純秀;陳國明;譚憶秋;;集料表面紋理粗糙度的測量[J];交通運輸工程學(xué)報;2009年01期

7 祖加輝;肖田;;細集料對瀝青混合料路用性能的影響研究[J];山西建筑;2010年36期

8 劉開澤;;用于瀝青混凝土路面集料的選擇與管理[J];科技信息(科學(xué)教研);2008年19期

9 李樹榮;高峰;廖孟柯;梁忠雨;;巖石粗糙節(jié)理剪切強度的分形分析[J];煤炭科學(xué)技術(shù);2006年11期

10 趙斌;王芝銀;伍錦鵬;;礦物成分和細觀結(jié)構(gòu)與巖石材料力學(xué)性質(zhì)的關(guān)系[J];煤田地質(zhì)與勘探;2013年03期

相關(guān)博士學(xué)位論文 前1條

1 孫楊勇;粗集料表面微觀構(gòu)造分形性質(zhì)探討與瀝青路面抗滑性能關(guān)系研究[D];華南理工大學(xué);2010年

本文編號：1705072