표제지
목차
ABSTRACT 9
제I장. 서론 10
제II장. 이론적 고찰 13
1. 포졸란물질 (Pozzolanic Materials) 13
1.1. 포졸란의 정의 13
1.2. 포졸란 재료의 성질 13
1.3. 포졸란 반응 13
1.4. 포졸란 물질의 종류 15
2. 고령토(kaoline)의 특성 16
3. 광물의 활성화(Activation) 21
3.1. 기존의 연구 동향 21
3.2. 활성화 방안 22
제III장. 실험방법 23
1. 메타카올린의 제조 23
1.1. 고령토의 활성화 23
1.2. 메타카올린의 수화 반응 특성 23
2. 활성화된 메타카올린의 혼화제 특성 26
2.1. 모르타르 혼화 실험 26
2.2. 콘크리트 혼화제 실험 26
3. 메타카올린의 재생골재에의 혼화제 특성 32
3.1. 시멘트 모르타르의 혼화 특성 실험 32
3.2. 포졸란 물질 표면 처리제의 제조 및 표면 처리 32
3.3. 시편의 표면관찰 및 SEM 관찰 32
4. 메타카올린을 이용한 폐콘크리트 슬러지의 활성화 실험 33
4.1. 원료 33
4.2. 시멘트 모르타르 공시체 제작 및 특성평가 33
제IV장. 실험결과 및 고찰 34
1. 고령토의 활성화 34
1.1. 활성화 온도에 따른 고령토의 특성 34
1.2. 하소 온도에 따른 고령토의 활성화 특성 36
1.3. 메타카올린와 혼합 시멘트의 수화반응 및 몰탈 실험 38
2. 활성고령토의 콘크리트 혼화 특성 42
2.1. 시멘트 모르타르에의 혼화 특성 42
2.2. 콘크리트에의 첨가 효과 47
3. 재생골재의 특성 42
3.2. 압축강도 51
3.3. SEM 관찰 53
4. 폐콘크리트 슬러지의 특성 향상 42
4.2. 압축강도 56
제V장. 결론 59
참고문헌 60
제II장. 이론적 고찰 8
Table 1. The properties of Kaoline group Minerals. 18
Table 2. The typical compositions of Domestic Kaolines. 19
Table 3. The Grade of Kaoline and Applications. 20
III 8
Table 1. The Chemical Compositions of Raw Kaoline. 25
Table 2. The Fundamental Mixing of Cement Mortars. 28
Table 3. The Physical Properties of Activated Kaolin and Silica Fume. 29
Table 4. The Materials for Concrete Specimens. 30
Table 5. The Fundamental Mixing of Concrete. 31
Table 6. Chemical composition of raw materials. 33
Table 7. The Chemical Compositions of Activated Kaolin. 35
Table 8. The Variation of Adsorbed Ca ion to Activated Kaolin. 36
Table 9. The Mixing Ratio of Cement and Admixtures for Measuring Integrated Heat of Hydration.. 39
Table 10. The Properties of Concrete using Admixtures of Activated Kaolin and Silica Fume. 47
Table 11. The Compressive Strength of Concrete using Admixtures of Activated Kaolin and Silica Fume. 48
Table 12. Characteristics of the natural, recycled and surface-treated aggregates.. 50
Table 13. Chemical composition of raw materials(%). 55
Fig. 1. 2000년 국내 고령토 매장 현황 10
Fig. 2. 국내의 고령토 생산량 추이 10
Fig. 3. 샤못트 생산량 및 이를 위한 고령토 사용량 추이 11
Fig. 4. The Ignition Loss of As-received Kaolin vs. Calcining Temperature. 34
Fig. 5. The Ignition Loss of As-received Kaoline vs. Calicining Time. 34
Fig. 6. The BET Specific Surface Area of Calcined Kaolin. 35
Fig. 7. The X-ray Diffraction Patterns of Calcined Metakaolin. 36
Fig. 8. The Variation of Soluble Si Contents of Activated Kaolin. 37
Fig. 9. The Variation of Soluble Al Contents of Activated Kaolin. 37
Fig. 10. The Variation of Ca(OH)₂ in the Cement Mixtures with Activated Kaolin. 38
Fig. 11. The Evolution rate of the Heat of Hydration. 39
Fig. 12. The Integrated Heat of Hydration by Hydration time. 39
Fig. 13. The Optimum Water Contents for the Hydration of Cement-Admixture Specimens. 40
Fig. 14. The Optimum Water Contents for the Hydration of Cement-Meta kaolin Mixtures. 40
Fig. 15. The Variation of free Ca(OH)₂ by the Hydration of Cement-Admixture Specimens. 41
Fig. 17. The Variation of Compressive Strength of Cement Mortars with Meta kaolin Admixtures. 42
Fig. 18. The Variation of Compressive Strength of Cement Mortars with 10 % Meta kaolin Admixtures. The W/C ratio was a) 65%, b) 50% and c) 30%. 43
Fig. 19. The X-ray Diffraction Patterns of Cured Cement mortars mixed with Calcined Meta kaolin. 44
Fig. 20. The SEM Photographs of Cured Cement mortars mixed with Calcined Meta kaolin. 45
Fig. 21. The Variation of Compressive Strength of Cement Mortars vs. the Amount of Meta kaolin Admixtures. The W/C ratio was a) 65%, b) 50%, and c) 30%. 46
Fig. 22. The Required Amount of A.E. Dispersant vs. the Amount of Substituted Admixtures. 48
Fig. 23. The Variation of Compressive Strength of Concretes 48
Fig. 24. The Variation of Compressive Strength of Concretes vs. the Amount of Meta kaolin Admixtures and Curing Time. (10%) 49
Fig. 25. The Variation of Compressive Strength of Concretes vs. the Amount of Meta kaolin Admixtures and Curing Time.(15%) 49
Fig. 26. The Variation of Compressive Strength of Concretes vs. the Amount of Meta kaolin Admixtures and Curing Time. (10%) 49
Fig. 27. a) Bulk density, b) Porosity, and c) Water absorption of the recycled fine aggregates. 50
Fig. 28. Compressive strength changes of the recycled aggregate mortar with a) Silica 51
Fig. 29. Compressive strength changes of the a) Surface treated recycled aggregate by silica fume and b) Surface treated recycled aggregate by Meta kaolin. 52
Fig. 30. Bulk density and porosity of recycled fine aggregate. a) and c) pozzolanic into recycled aggregates. b) and d) Surface treated recycled aggregates. 52
Fig. 31. Micrographs of the surface of (a) fine aggregate (b) recycled fine aggregate, (c) silica fume, and (d) meta kaolin. 53
Fig. 32. Scanning electron micrographs of the surface of (a) by 20% silica fume and (b) by 30% silica fume, (c) by 20% meta kaolin and (d) by 30% meta kaolin. 54
Fig. 33. XRD pattern of the sludge of waste concrete. 55
Fig. 34. Compressive strength of cement mortars with sludge addition. 56
Fig. 35. XRD pattern of the sludge of waste concrete at Mixing rate. 56
Fig. 36. TG/DTA curve and XRD pattern of the waste concrete sludge calcined at various temperature. 57
Fig. 37. Compressive strength of sludge mortar. Meta kaolin was added to a) raw sludge and b) heat-treated sludge. 57
Fig. 38. Scanning electron micrographs of the Sludge mortar, a) 0 %, b) 10%, c) 20%, and d) 30% meta kaolin was added to raw sludge. 58
Fig. 39. XRD patterns of sludge mortars. (Meta kaolin was added to sludge cement. 58