研究生: |
羅尊仁 TUSN-JEN LO |
---|---|
論文名稱: |
橡膠瀝青流變行為與工程性質評估 Rheological Behavior and Engineering Evaluation of Crumb Rubber Modified Asphalt Binders |
指導教授: |
廖敏志
Min-Chih Liao |
口試委員: |
黃兆龍
Chao-Lung Hwang 陳建旭 Jian-Shiuh Chen 廖敏志 Min-Chih Liao 蘇育民 Yu-Min Su |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2018 |
畢業學年度: | 106 |
語文別: | 中文 |
論文頁數: | 156 |
中文關鍵詞: | 橡膠瀝青 、流變行為 、多重應力潛變恢復試驗 |
外文關鍵詞: | Crumb Rubber Modified Bitumen, Rheological Behavior, Multiple Stress Creep Recovery |
相關次數: | 點閱:290 下載:0 |
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國內橡膠瀝青規範依基本物性作為分類依據,無法適當地橡膠瀝青的鋪面性能,仍需建立橡膠瀝青流變行為的預測模式,瞭解橡膠瀝青於不同氣候及交通條件下鋪面性能良窳。本研究選用通過No.30號篩橡膠膠粉與通過No.200橡膠膠粉作為瀝青改質劑,其中,通過No.30號篩橡膠膠粉之橡膠瀝青進行基本物性試驗及韌性試驗,而通過No.200號篩橡膠膠粉之橡膠瀝青進行DSR流變試驗。基本物性及韌性試驗顯示橡膠膠粉能提升基底瀝青的軟化點、黏滯度及回彈率,也會降低其針入度及溫感性;依國內橡膠瀝青規範分類,採用針入度60/70瀝青作為橡膠瀝青的基底瀝青,添加15%橡膠膠粉改質後,能滿足TypeⅠ與TypeⅡ的基本物性要求;另外,橡膠瀝青內含溶脹橡膠無法增加基底瀝青於25℃時的黏結力,但能提升基底瀝青的抗拉拔強度。頻率掃描試驗顯示橡膠膠粉能使基底瀝青的複合剪切模數增加、相位角減少,提升基底瀝青的高溫抗車轍變形能力;CA流變模式、改良型CAM流變模式及多項式流變模式均能擬合出橡膠瀝青的流變行為,然而,橡膠瀝青內存有溶脹橡膠,將導致橡膠瀝青的工作溫度隨橡膠添加量增加而提高,經不同工作溫度分析法得知,相位角法與穩態剪切流動法所獲得的工作溫度均較傳統Brookfield黏滯度法還低,仍需透過試拌與試鋪程序決定;多重應力潛變恢復試驗亦發現橡膠膠粉能提升石油瀝青的抗變形能力與交通承載能力,針入度60/70瀝青經添加15%以上的橡膠膠粉改質後,歸類為能承受中度重載交通量,而針入度20/40瀝青、改質Ⅲ型瀝青及高黏度改質瀝青均歸類為能承受極度重載交通量。
Due to the fact that the current specification for the Crumb Rubber Modified Bitumen (CRMB) only represents the conventional properties of the CRMB at specified temperatures, it is necessary to investigate the rheological behavior of the CRMB over a wide range of temperatures. The objective of this study was to investigate the effects of base asphalt type and crumb rubber content on the pavement-related performance of the CRMB. The CRMBs were also classified in terms of the climate and traffic conditions. The empirical test results showed that the performance of penetration, softening point, viscosity, elastic recovery and viscosity-temperature-susceptibility was improved due to the rubber modification. The pen grade 60/70 asphalt containing 15% crumb rubber met the Type I and Type II specification. The toughness test result revealed that the ultimate strength was increased with increasing the rubber content, whereas a reduction in tenacity was obtained for the CRMB at higher rubber contents. With regards to the DSR master curves, the rubber modification enhanced the shear complex modulus (G*) and reduced the phase angle (δ). In addition, the curve fitting using the classic rheological models clearly interpreted the rheological behavior of the CRMBs over a wide range of the temperatures. Regarding the workability for the CRMBs, the mixing and compaction temperatures using the phase angle method and steady shear flow method were lower compared to those using the traditional Brookfield rotational viscosity method. It was recommended that the temperatures for the workability be determined in term of the trial mixes in the plant. In addition, based on the MSCR (multiple stress creep recovery) test results, the pen grade 60/70 asphalt incorporating 15% and 20% rubber contents could be used for very high traffic condition, while the highly-modified polymer asphalt could be utilized for extreme traffic condition.
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