Heating and its Effect on Hot In-Place Recycling of Asphalt Pavements with Rejuvenator

The effects of artificial heating on the temperature and rejuvenation of aged asphalt during hot in-place recycling of asphalt pavements have been investigated through finite element modeling and experimental study. The major conclusions are: the temperature rise that results from heating dissipates very quickly along the depth of the pavement (1.6℃ to 2.8℃ per mm), a very high surface temperature does not ensure a desirable temperature of plus 100℃ below the surface, and a more uniform temperature profile (along the depth) is achieved by using hot air, compared to radiation only; for the radiation levels that are desirable with respect to maximum surface temperatures of 180℃, and for conventional heating time periods, an effective increase in temperature in the pavement to plus 100℃ can only be possible within the first 30 to 50 mm of the surface; the extent of rejuvenation depends on the temperature, the time of mixing, as well as the viscosity of the rejuvenator; there exists a gradient of rejuvenation across the thickness of the film of the Reclaimed Asphalt Pavement (RAP) asphalt binder. For example, for a mixing time of 90s, for a rejuvenator with a viscosity of 1/4^(th) the viscosity of RAP binder, the extent of rejuvenation ranges from a maximum of 35 percent at the surface of the RAP binder to zero percent at 1 micrometer, for mixing at 60℃; 70 percent at the surface to zero percent at 8 micrometer, for mixing at 150℃. The percentage of rejuvenation is higher for a longer mixing time and a rejuvenator with lower viscosity. The selection of the appropriate recycling agent or rejuvenator, and for hot recycling should be made on the basis of consideration of temperature and time of mixing.

並列關鍵字

Asphalt ； Hot-in-place ； Recycling ； Rejuvenation ； Temperature

被引用紀錄

吳建璋（2007）。活性粉多孔隙混凝土應用於道路面層之工程性質研究〔碩士論文，淡江大學〕。華藝線上圖書館。https://doi.org/10.6846/TKU.2007.00247

黃國維（2002）。瀝青混凝土以版式反覆荷重試驗評估抗車轍潛能及預估車轍之可行性初步研究〔碩士論文，中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200200415

李寧（2016）。鋪面整修工程之節費與減碳對策〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU201602029

陳順興（2011）。國道3號使用高性能瀝青混凝土之耐久性研究（以高公局關西工務段轄區為例）〔博士論文，國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-1903201314431006

邱志忠（2013）。以超快時間解析光學克爾光閘螢光光譜研究分子間與分子內電荷轉移〔博士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-2511201311325283

國際替代計量

Heating and its Effect on Hot In-Place Recycling of Asphalt Pavements with Rejuvenator

全文下載

主題瀏覽