Yahya Ghasemi Print III pdf

TABLE OF CONTENT
 
PREFACE
................................................................................................................................................ i 
ABSTRACT
............................................................................................................................................ iii 
SAMMANFATTNING
........................................................................................................................... iv 
TABLE OF CONTENT
........................................................................................................................... v 
NOTATIONS
......................................................................................................................................... vii 
ABBREVIATIONS
................................................................................................................................. ix 
1. INTRODUCTION
............................................................................................................................... 1 
1.1. Background
.................................................................................................................................. 1 
1.2. Research Objectives and Questions
.............................................................................................. 3 
1.3. Limitations
................................................................................................................................... 4 
1.4. Approach
...................................................................................................................................... 4 
1.5. Structure of the thesis
................................................................................................................... 5 
1.6. Appended papers
.......................................................................................................................... 5 
2. AGGREGATES IN CONCRETE
....................................................................................................... 7 
2.1. Purpose and role of aggregates
..................................................................................................... 7 
2.2. Origin and classification of aggregates
........................................................................................ 9 
2.3. Physical properties of aggregates
............................................................................................... 10 
3. MIX DESIGN APPROACHES
......................................................................................................... 13 
3.1. Ideal size distribution curve
....................................................................................................... 15 
3.2. Particle packing theory
............................................................................................................... 16 
3.2.1. Toufar Model
........................................................................................................................... 17 
3.2.2. DTI 4C model
.......................................................................................................................... 18 
3.2.3. Compressible packing model (CPM)
...................................................................................... 18 
3.3. Multi-phase approaches
.............................................................................................................. 20 
3.3.1. Particle-matrix model
.............................................................................................................. 21 
3.3.1.2. The flow resistance ratio
...................................................................................................... 21 
3.3.1.3. The air voids modulus
.......................................................................................................... 22 
3.3.1.4. Workability function for concrete
........................................................................................ 23 
3.3.2. Layer theories
.......................................................................................................................... 23 
3.3.2.1. Square-cube law
................................................................................................................... 26 
3.3.2.2. Equivalent polyhedron shape
............................................................................................... 27 

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3.4. Concluding remarks
................................................................................................................... 29 
4. METHODS
........................................................................................................................................ 30 
4.1. Test methods
.............................................................................................................................. 30 
4.1.1. Sampling of aggregates
........................................................................................................... 30 
4.1.2. Sieve analysis
.......................................................................................................................... 30 
4.1.3. Specific gravity
........................................................................................................................ 30 
4.1.4. Packing methods
...................................................................................................................... 31 
4.1.5. Surface area measurements
..................................................................................................... 31 
4.2. Theoretical methods
................................................................................................................... 32 
4.2.1. Studied particle packing models
.............................................................................................. 32 
4.2.2. Layer theories
.......................................................................................................................... 32 
5. EXPERIMENTAL RESULTS
.......................................................................................................... 34 
5.1. Packing models study
................................................................................................................. 34 
5.2. Computation of specific surface area
......................................................................................... 36 
6. DISCUSSION AND CONCLUSIONS
............................................................................................. 38 
6.1. Accuracy of particle packing models
......................................................................................... 38 
6.2. Estimation of specific surface area
............................................................................................. 38 
6.3. Future work
................................................................................................................................ 39 
6.3.1. Estimation of SSA
................................................................................................................... 39 
6.3.2. Water requirement of mixtures
................................................................................................ 40 
References
......................................................................................................................................... 42 
APPENDIX 1
........................................................................................................................................ 53 

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