Experimental investigation on the shrinkage and hydration kinetics of cement paste matrix incorporated with MWCNT
- Issued Date
- 2017
- Abstract
- In this Research, a detailed study is done aiming to investigate the effect of the nano-filament, Multiwalled Carbon Nanotube (MWCNT), on the hydration kinetics, shrinkage and engineering properties of a cement paste matrix incorporated with MWCNT. Micro-level silica fumes were used to disperse the CNT mechanically throughout the cement matrix with a low water-binder ratio. The research was performed in two basic parts; one is analyzing the effect of the CNT on the engineering property of the cement paste matrix such as flowability, compressive strength, flexural strength, and dynamic modulus. The other is investigating the CNT effect on the shrinkage and hydration kinetics by analyzing data's from, linear deformation, isothermal calorimeter, and degree of hydration measurement. In general, from the experimental result except for the compressive strength, the flexural strength and dynamic modulus of elasticity show an increase by incorporating CNT in the cement matrix. However, the addition of CNT led an increase in dry and autogenous shrinkages but the degree of hydration was not changed by the use of CNT.|시멘트 페이스트 매트릭스의 수화 속도, 수축 및 엔지니어링 특성에 대한 Multiwalled carbon nanotube (MWCNT) 의 효과를 조사하기 위한 연구가 수행되었다. CNT를 시멘트 매트릭스 전체에 고르게 분산시키기 위해 실리카퓸과낮은 물 바인더 비율이 적용되었다. 이 연구는 두 가지 부분으로 구성되었다. 먼저 유동성, 압축 강도, 굴곡 강도 및 동적 계수와 같은 시멘트 페이스트 매트릭스의 공학적 특성에 대한 CNT의 영향을 분석하는 것이다. 이후수축, 미소 수화열 및 수화도를측정 분석하여 수축 및 수화 속도에 CNT 효과를 조사하는 것입니다. 일반적으로 압축 강도를 제외한 휨강도와동탄성계수는 시멘트 기지 내에 CNT를 혼입시킴으로써 현저한 증가를 보였다. 그러나, CNT는 일부 수축량을시키고 수화율을 낮추었다.
- Alternative Title
- MWCNT 혼입 시멘트 페이스트의 수축과 수화성상변화에 대한 실험적 연구
- Alternative Author(s)
- Bedso Million Tafesse
- Affiliation
- Chosun university
- Department
- 일반대학원 건축공학과
- Advisor
- Hyeong-Ki Kim
- Awarded Date
- 2017-11
- Table Of Contents
- Abstract i
Abstract in Korean ii
Dedication iii
Table of Contents iii
List of Table v
List of Figures vi
Chapter 1. Introduction 1
1.1 Background 1
1.2 Procedure of the thesis 2
1.3 Objective of the thesis 4
Chapter 2. A synopsis on the backgrounds and literature reviews -A review 5
2.1 Introduction 5
2.2 CNT 7
2.2.1 Production of CNT 8
2.2.2 Application of CNT in the construction sector 9
2.3 Silica fume 10
2.4 Degree of hydration 11
2.4.1 Mechanism and rate of cement hydration 12
2.5 Shrinkage 14
2.5.1 Types of shrinkages 15
2.5.2 Mechanism of shrinkage 16
2.6 Literature review 18
2.7 Summary 22
Chapter 3. Engineering property of cement paste incorporating MWCNT 24
3.1 Introduction 24
3.2 Material and method 24
3.2.1 Material 24
3.2.2 Mix Proportion 25
3.2.3 Method 26
3.3 Result and discussion 30
3.3.1 Flowability 30
3.3.2 Mechanical properties 33
3.4 Summary 38
Chapter 4. The effect of MWCNT on hydration kinetics and shrinkage 40
4.1 Introduction 40
4.2 Material and method 40
4.2.1 Material and mix proportion 40
4.2.2 Experimental method 40
4.3 Result and discussion 43
4.3.1 Microstructure of CNT reinforced cement paste matrix 43
4.3.2 Hydration kinetics 48
4.3.3 Shrinkage 54
4.4 Summary 57
Chapter 5. Conclusions 59
5.1 Summary 59
5.2 Limitations 60
5.3 Further studies 61
References 62
Acknowledgement 71
Curriculum Vitae 72
- Degree
- Master
- Publisher
- Graduate School of Chosun University
- Citation
- 벳소 밀리언 타페세. (2017). Experimental investigation on the shrinkage and hydration kinetics of cement paste matrix incorporated with MWCNT.
- Type
- Dissertation
- URI
- https://oak.chosun.ac.kr/handle/2020.oak/13352
http://chosun.dcollection.net/common/orgView/200000266263
- Appears in Collections:
- General Graduate School > 3. Theses(Master)
- Files in This Item:
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