現今由於電腦功能漸強，加上各種應用軟體的開發，使影像處理 不再侷限在以往太空遙測及軍事用途上，其在土木工程上的應用也逐 漸增加。藉由數位影像處理的技術與相關軟體的配合不但可克服過去 人工觀測費時費力的缺點，並可透過影像處理軟體進行快速且客觀的 定量分析，獲得其它傳統試驗所無法獲得之重要參數，同時提高其精 本研究之目的主要應用數位影像分析之技術來檢視粒料形狀特 性以取代傳統人工主觀檢視之方式，達到省時省力而又不損失精確度 的目的。透過影像處理分析技術進行大量的定量分析。另一方面藉由 數位影像分析之技術探討粒料結構改變，對瀝青混凝土力學成效特性 的影響。經由實驗室各項力學成效試驗比較石膠泥瀝青混凝土(簡稱 SMA)及傳統密級配(簡稱DGAC)之差異。希望藉由粒料結構之特性 與其反應之巨觀工程性質作一分析探討。以微觀的量化參數取代過去 研究結果顯示，透過影像處理軟體確實可以快速且客觀地對粒料 形狀做定量之分析，獲得其它傳統試驗所無法獲得之重要參數。另 外，SMA 在粒料結構方面，其粒料可提供較佳之互鎖力及強壯的骨 架，因此較傳統密級配表層鋪面具有較高之抗變形能力 With the swift advancement of computer software and hardware techniques, applications of digital image process is no longer limited to remote sensing or military purposes. Nowadays, researches in the field of civil engineering utilize this technique. The technique of digital image process and the incorporated relating software can help us overcome the time-consuming and labor-intensive problem in analyzing the aggregate structure of asphalt concrete. In the mean time, it offers a rapid and objective quantitative analysis. Consequently, significant parameters that can hardly be obtained from traditional experiments can then be easily and accurately collected. The objective of this study is mainly focused on examining the particle shape characteristics of the coarse aggregates by digital image analysis instead of the traditional way – which is more subjective. It’s expected to reach the goal of time and labor saving without losing accuracy. Thus, we can make a great deal of quantitative analysis through digital image analysis. On the other hand, we can discuss what’s the effect of changes of aggregate arrangement on mechanical behavior of asphalt concrete. With various mechanical experiments, we compare the differences of aggregate structures between Stone Mastic Asphalt (SMA) and Dense-Graded Asphalt Concrete (DGAC). The aggregate structures are then investigated by the engineering properties of composition and macrocosm. Analyzing the test data, we conclude that the composition of aggregates and their behavior of mechanics are closely correlated, hence the micro quantitative parameters can be substituted forthe past macrocosm description. The result reveals that application of the rapid and objective quantitative image process on analysis of the shape of aggregate is feasible. Meanwhile, important parameters, such as aggregate orientation, obtained with the digital image process are also found adequate to describe mechanical behavior of asphalt concrete. Moreover, SMA is found, as other studies, to have better ability to resist permanent deformation than DGAC as a result of the stone-on-stone action.
