千里達湖瀝青(TLA)為天然形成之瀝青黏結料，近幾年石油瀝青價格高漲，TLA再度成為新興鋪面材料，本研究探討TLA添加於傳統瀝青之質流性質與化學性質。
本研究將TLA和傳統黏結料(Pen60/70和Pen85/100)分別依重量百分比1:1、1:2、1:3及1:4摻配，進行基本物性試驗與使用動態剪切質流儀 ( Dynamic Shear Rheometer,DSR)於不同試驗條件下研究瀝青黏結料之質流行為，探討TLA改質瀝青黏度與潛變行為，並將TLA改質瀝青進行凝膠滲透層析儀( Gel Permeation Chromatography, GPC)與傅立葉轉換紅外線光譜儀( Fourier Transform Infrared Spectroscopy, FT-IR)分析瀝青分子大小和化學官能基。
研究成果顯示瀝青黏結料之複合模數(G*)隨TLA含量增加而上升，相位角(δ)則反之 ，同時可降低老化現象並有助於抵抗車轍，由於TLA含豐富礦物填充料，瀝青黏結料容易產生離析現象。DSR試驗得到TLA改質瀝青黏結料之零剪力黏度(Zero Shear Viscosity, ZSV)、穩態黏度(Steady State viscosity, SSV)與低剪力黏度(Low Shear Viscosity, LSV)，三種黏度特性於低頻時皆不隨剪應變率改變且黏度值相近，此區間之瀝青黏結料特性穩定，因此可做為抗車轍指標。GPC試驗結果顯示TLA含量愈多，大分子、小分子與廣分佈指數(Polydispersity Index, PDI)指數愈高；FT-IR試驗結果顯示隨著TLA含量增加，官能基酮與亞砜皆有上升趨勢，說明添加TLA使老化官能基更明顯。

關鍵字：千里達湖瀝青(TLA) 、質流行為、離析

Trinidad Lake Asphalt (TLA) is a natural asphalt binder.Because the high prices of petroleum asphalt in recent years, TLA becomes a new paving material once again. This study is discussed the rheological behavior and chemical properties of TLA mixed with traditional binders.
In this study, the ratio TLA mixed with traditional Binders (Pen60/70 and Pen85/100) by weight percentage are 1:1,1:2,1:3 and 1:4,using basic physical tests and Dynamic Shear Rheometer(DSR) with different experimental conditions to discussed viscosity and creep behavior of TLA modified bitumen, and analysis asphalt molecular size and chemical functional groups by Gel Permeation Chromatography(GPC) and Fourier Transform Infrared Spectroscopy (FT-IR).
The results indicate the complex modulus(G*) and phase angle(δ) of binders were separately increased and decreased with the rise in TLA content, while reducing the aging phenomenon and improving the resistance of rutting. Because the rich mineral filler of TLA modified bitumen , it is easy to generate segregation phenomenon.
DSR tests can get the Zero Shear Viscosity ( ZSV),Steady State viscosity (SSV) ,Low Shear Viscosity (LSV) of TLA modified bitumen by DSR tests.Three kinds of viscosity properties at low frequencies are not changed by shear rate and alike, this range with viscosity of the asphalt binder is stable, so it can be used as indicator of resistance to rutting.GPC result shows that the large molecules, small molecules and Polydispersity Index (PDI) were increased with the rise in TLA content ; FT-IR result shows that ketone and sulfoxide were increased with the rise in TLA content, indicating that it is more obvious in aging functional groups with adding TLA.

Keyword: Trinidad Lake Asphalt (TLA), rheological behavior, segregation.

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