Evaluation of Hybrid Electric Arc Furnace Steel Slag and Reclaimed Asphalt Pavement in Asphalt Concrete

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姓名

史雅敏(Hasnae Amal Smimine) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

Evaluation of Hybrid Electric Arc Furnace Steel Slag and Reclaimed Asphalt Pavement in Asphalt Concrete
(Evaluation of Hybrid Electric Arc Furnace Steel Slag and Reclaimed Asphalt Pavement in Asphalt Concrete)

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摘要(中)

隨著台灣廢棄物堆放量的增加，再生材料導入土木工程中，尤其是鋪面領域以符合可持續發展的研究是必要的，電弧爐（Electric Arc Furnace, EAF）鋼渣是煉鋼工業生產的再生材料之一，再生瀝青鋪面（Reclaimed Asphalt Pavement, RAP）是常見的另一種再生材料，由道路維護和銑刨產生。本研究旨在評估含有細EAF和RAP粒料的熱拌瀝青混合料，第一種配比設計包含30％的EAF，第二種配比設計混合各20％的EAF和RAP，使用設計配比進行實驗室拌合和夯打馬歇爾試體以及一系列實驗測試，對照組的物理性能進行比較評估，和對照組相比，EAF和EAF + RAP配比的馬歇爾穩定值較低，但在抗車轍和抗水分侵害方面表現更好。本研究的第二階段，進行現地試鋪，將試驗道路分成三個不同的斷面，每個斷面皆為實驗室設計的配比之一，廠拌的瀝青混合料有質量控制的問題，含有EAF的瀝青混合料中的孔隙率極低，然而，在試鋪道路完成之後進行了三次成效追蹤，每次間隔一個月，EAF斷面，顯示出最佳的車轍抗性和防滑性，而所有三個斷面都表現出令人滿意的平整度，因此，使用一到二種再生材料的瀝青混合料呈現的結果是令人滿意的，符合可持續發展，建議未來應針對新的再生材料導入土木工程的研究。

摘要(英)

With the increase of the piling of the waste materials in Taiwan, it is relevant to take actions following the sustainable development norms and find ways to introduce the recycling materials into the civil engineering work such as the pavements construction. The electric arc furnace (EAF) steel slag is one of the recycling materials piling in the nature produced from the steel refining industry. Reclaimed asphalt pavement (RAP) is another recycling material resulted from the roads milling for roads maintenance and rehabilitation. This study aimed at evaluating hot mix asphalt mixtures containing of both the EAF fine steel slag aggregate and RAP. The first mix design contains the EAF with 30% and the second mix design contains the hybrid EAF and RAP with 20% each. Laboratory mixed and compacted specimens are designed and carried for a chain of experimental tests to evaluate their physical properties performance as they are compared to a control mix design. The EAF and EAF+RAP exposed less Marshall stability compared to the control mix yet performed better in terms of rutting resistance and moisture susceptibility. For the second phase of the study, a road test was paved into three distinct sections each presenting one of the previously designed mixtures in the lab. The paving plant’s mixtures were investigated and showed critical quality control: the air voids within the mixtures containing EAF showed very critical air voids percentages. Nevertheless, after the road paving, in-site tests were carried out on three different dates with one-month interval between each date. The EAF section, next to the section with the hybrid EAF+RAP, showed the best rutting resistance and skid resistance while all of the three sections displayed a satisfying smoothness. Thus, the incorporation of one to two recycling materials yielded in satisfying results and the investigation to introducing new recycling materials to the civil engineering work should carry on for the sake of the sustainable development.

關鍵字(中)

★ 細氧化碴
★ 刨除料
★ 試驗道路

關鍵字(英)

★ EAF fine steel slag
★ RAP
★ road test

論文目次

Abstract III
List of Figures IV
List of Tables VI
1. Introduction 1
1.1. Research background 1
1.2. Research objectives 2
1.3. Research scope 2
1.4. Study flowchart 3
2. Literature review 4
2.1. Asphalt containing EAF steel slag 4
2.2. Asphalt containing Recycled Asphalt Pavement (RAP) 11
3. Methodology 17
3.1. Methodology scope 17
3.2. Material selection 17
3.2.1. Aggregates physical properties tests 17
3.2.2. Asphalt binder physical properties tests 19
3.3 The experimental designs 25
3.3.1. Experimental design 1 – Control mix with natural aggregates only 26
3.3.2. Experimental design 2 – EAF mix 26
3.3.3. Experimental design 3 – EAF and RAP mix 26
3.4. Laboratory performance 27
3.4.1. Optimum binder content 27
3.4.2. The plant’s pre-mix quality control 29
3.4.3. Hamburg wheel rutting test 30
3.4.4. Indirect tensile strength test (IDT) 31
3.4.5. Tensile strength ratio (TSR) 32
3.5. Road test 34
3.5.1. Toxicity characteristic leaching procedure (TCLP) 36
3.5.2. Skid resistance test 39
3.5.3. Straightedge rutting test 40
3.5.4. International Roughness Index (IRI) 40
Chapter 4. Results and discussion 43
4.1. Material selection 43
4.1.1. Aggregates physical properties 43
4.1.2. Asphalt binder properties 45
4.2. Experimental design 1 – Natural aggregate 47
4.2.1. Sieve analysis 47
4.2.2. Optimum binder content 48
4.3. Experimental design 2 - EAF 50
4.3.1. Sieve analysis 50
4.3.2. Optimum binder content 52
4.4. Experimental design 3 – EAF + RAP 54
4.4.1. Sieve analysis 54
4.4.2. Optimum binder content 56
4.5. Laboratory performance 58
4.5.1. Volumetric properties 58
4.5.2. Marshall stability and flow test 59
4.5.3. The plant’s pre-mix for quality control 61
4.5.4. Field’s cores Marshall Test 63
4.5.5. Hamburg wheel rutting test 66
4.5.6. Indirect Tensile strength test (IDT) 74
4.5.7. Tensile strength ratio (TSR) 76
4.6. Road performance 79
4.6.1. Toxicity characteristic leaching procedure 79
4.6.2. Skid resistance test 83
4.6.3. Straightedge rutting test 84
4.6.4. International Roughness Index (IRI) 85
Chapter 5: Conclusions and Recommendations 88
5.1. Conclusions 88
5.2. Recommendations 89
References 90

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指導教授

陳世晃林志棟(Shih-Huang Chen Jyh-Dong Lin)

審核日期

2019-1-30

推文