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요약 5

Ⅰ. 서론 8

1. 연구배경 및 목적 8

2. 연구방법 11

3. 연구 동향 12

가. Texas Boiling Test 12

나. 잔류 안정도 시험 12

다. 잔류 강도 지수 시험 13

라. TSR(Tensile Strength Ratio) 13

마. 정적 수침 시험 14

바. MVT(Mix Verification Tester) 시험 14

사. Texas 동결-융해 시험 15

아. 수침 압축 시험 15

자. 비파괴 충격파를 이용한 수분민감도 연구 15

Ⅱ. 이론적 고찰 17

1. 진동 시스템 17

가. 부족감쇠운동 20

나. 과도감쇠운동 21

다. 임계감쇠운동 22

Ⅲ. 시험 장비 및 시험방법 23

1. 시험 장비 23

2. 시편제작 25

3. 시험계획 및 평가방법 28

가. 비파괴 충격파 시험계획 28

나. 동탄성계수 평가 방법 32

Ⅳ. 시험결과 및 고찰 36

1. 측정신호(Signal) 36

2. 동결 전·후의 동탄성계수 결과 및 고찰 46

Ⅴ. 결론 66

참고문헌 68

Abstract 72

표목차

Table 3.1. Data of Asphalt Mixtures for Evaluating Dynamic Modulus 27

Table 4.1. Resonance Frequency of Asphalt Mixture with 10% Air Void at Each Temperature 43

Table 4.2. Resonance Frequency of Asphalt Mixture with 15% Air Void at Each Temperature 44

Table 4.3. Resonance Frequency of Asphalt Mixture with 20% Air Void at Each Temperature 45

Table 4.4. Dynamic Modulus of Asphalt Mixture with 10% Air Void about Freezing and Thawing 47

Table 4.5. Dynamic Modulus of Asphalt Mixture with 15% Air Void about Freezing and Thawing 48

Table 4.6. Dynamic Modulus of Asphalt Mixture with 20% Air Void about Freezing and Thawing 49

Table 4.7. RMSE Analysis Results at 10% Asphalt Mixture 53

Table 4.8. RMSE Analysis Results at 15% Asphalt Mixture 54

Table 4.9. RMSE Analysis Results at 20% Asphalt Mixture 55

Table 4.10. MPE Analysis Results at 10% Asphalt Mixture 58

Table 4.11. MPE Analysis Results at 15% Asphalt Mixture 59

Table 4.12. MPE Analysis Results at 20% Asphalt Mixture 60

Table 4.13. Correlation for the Dynamic Modulus 61

그림목차

Fig. 1.1. Process of Experiment for Freezing and Thawing 11

Fig. 2.1. Diagram of Spring-Mass Model 19

Fig. 2.2. Diagram for Underdamped Motion 20

Fig. 2.3. Diagram for Overdamped Motion 21

Fig. 2.4. Diagram for Critically Damped Motion 22

Fig. 3.1. Accelerometer for Experiment with Non-Destructive Impact Wave 24

Fig. 3.2. Gyratory Compactor 26

Fig. 3.3. Diagram about Coring of Asphalt Mixture for Evaluating Dynamic Modulus 26

Fig. 3.4. Coring of Asphalt Mixture 27

Fig. 3.5. Process of Experiment with Freezing and Thawing 28

Fig. 3.6. Pluse Data on Lap-top Screen 29

Fig. 3.7. Improvement of Experiment with Evaluating Dynamic Modulus 31

Fig. 3.8. UTM(Universal Testing Machine) 33

Fig. 3.9. Diagram of An thermo-hygrostat 34

Fig. 3.10. Thermo-hygrostat 35

Fig. 4.1. Time Weighting Function obtained from Accelerometers 37

Fig. 4.2. Impact Signal obtained from Accelerometer at Asphalt Mixture: (a) Rippling Noise Signal, (b) Impulse Signal 38

Fig. 4.3. FRF and Coherence based on the Input and Output Signals at Each Temperature using 10% Normal Asphalt Mixture 41

Fig. 4.4. Coherence based on the Input and Output Signals at 15℃ 42

Fig. 4.5. Dynamic Modulus of Asphalt Mixtures 50

Fig. 4.6. RMSE from 10%, 15% and 20% Asphalt Mixture 56

Fig. 4.7. Correlation Diagrams for the Dynamic Modulus at 10% Asphalt Mixture 62

Fig. 4.8. Correlation Diagrams for the Dynamic Modulus at 15% Asphalt Mixture 63

Fig. 4.9. Correlation Diagrams for the Dynamic Modulus at 20% Asphalt Mixture 64