利用紅外線熱影像探討台灣橡膠瀝青鋪面之熱分離現象 -應用層級多重分類法

熱拌瀝青是台灣鋪設道路的主要技術，溫度為熱拌瀝青重要檢測標準。何謂熱分離? 根據國外研究顯示在檢測滾壓熱拌瀝青混凝土時，發現當鋪面區塊表面溫度與周圍區塊溫度差異達到13.89℃以上，容易產生一種熱分離現象的缺陷問題，在溫度較低區塊會發生密度降低及導致骨料分離產生，作為分辨熱分離現象主要是以表面溫度區塊比對作為判斷。採用紅外線熱像儀進行拍攝，以獲得大面積的表面溫度數據來代替原有檢測溫度儀器所記錄的單點溫度，再來利用熱影像進行影像層集多重分類法作為分析，將溫度資訊相近的像元歸類成同一區域，使得可以辨別每個區域溫度分佈是均勻的，縮小區域範圍以找出熱分離現象，以兩種不同鋪面橡膠瀝青與一般瀝青作為實驗判斷依據。實驗結果顯示，經由紅外線熱像儀所拍攝的熱影像，不僅提供清晰的表面溫度數據影像還得到大範圍的熱影像，再利用本文提出影像層集多重分類法作為影像分析，可以明確找出熱分離的缺陷區塊位置，以利事後定點檢測及修復，也在兩種實驗體比較中找出兩者因材料的差異性，而溫度降溫有所不同及發生熱分離的可能性。

關鍵字

熱分離現象；紅外線熱影像；橡膠瀝青混凝土；層集多重分類法

並列摘要

The hot mix asphalt is the main technology of paving the road in Taiwan. The surface temperature of pavement is important for its test criteria. Research has shown that the surface temperature among tested areas difference ranging over 13.89℃(25℉) will cause the thermal segregation defect during the test of hot mix asphalt compaction. The defect of the lower densities and aggregate segregation are shown by the lower-temperature areas. Determining the thermal segregation is mainly by contrasting the temperature of the tested areas. This paper uses infrared thermography to obtain the surface temperature data from the large area, which is able to replace the single point temperature recorded by the original equipment. Following that, it is by using the multilevel level set approach to analyze the thermal image data which compares the similarities between the interested regions and their surrounding neighbors. That can recognize the average surface temperature of each region and find out the thermal separation as well. In the long run, the experimental results have displayed that the thermal images by the infrared thermography can not only provide clear images but also get a wide range of thermal images. The location of the thermal segregation defects can be exposed to the conduct of the Multilevel Level Set Approach.

並列關鍵字

thermal segregation ； infrared thermography ； asphalt rubber concrete ； the multilevel level set approach

參考文獻

【1】 Jongchul Song, Magdy Abdelrahman and Eric Asa. “Use of a Thermal Camera during Asphalt Pavement Construction”, North Dakota Department of Transportation Materials and Research Division.,2009

Google Scholar

【2】 Willoughby,K.A., Steven,A.R. and Mahoney,J.P. “Construction-Related Asphalt Concrete Pavement Temperature Differentials And The Corresponding Density Differentials”. Report No. WA-RD 476.1, Washington State Transportation Center.,2003

Google Scholar

【3】 Amirkhanian, S. N., and Putman, B. J. “Laboratory and Field Investigation of Temperature Differential in HMA Mixtures Using an Infrared Camera”. Clemson University. Report No. FHWA-SC-06-06. Clemson, SC.,2006

Google Scholar

【4】 Henault, J., “Development of guidelines for reduction of temperature differential damage for hot mix asphalt pavement projects in Connecticut”.,Connecticut Department of Transportation, Newington, CT.,1999

Google Scholar

【5】 Stroup-Gardiner, M., and Brown, E.R. “Segregation in Hot Mix Asphalt Pavements.” National Cooperative Highway Research Program Report 441. Transportation Research Board, National Research Council, Washington, D.C.,2000

Google Scholar

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利用紅外線熱影像探討台灣橡膠瀝青鋪面之熱分離現象 -應用層級多重分類法

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