Key Features:
No of Pages: 56
Abstract:
The effect of crushed granite aggregate sizes for concrete work is investigated in this paper. Normal concrete is being produced from different aggregate sizes and this produces different properties to the resulting concrete. For the purpose of this work, eight aggregate sizes of 12.5 mm, 10.0 mm, 5.0 mm, 4.0 mm, 3.0 mm, 2.36 mm, 1.12 mm, and 0.6 mm from crushed granite were used. The fine aggregate is normal sand obtained from a borrow pit. Test conducted include sieve analysis. Nominal mix (1:2:4) was adopted for this work and mix composition was calculated by absolute volume method. For each of the crushed aggregate sizes, 8 cubes (100x100mm) were cast and cure for 28day. Thereafter, some laboratory tests such as Aggregate Crushing Value test (ACV), Aggregate Impact Value test (AIV), Uniaxial Compressive Strength (UCS) test, Abrasive test, Hardness Test, and Drilling test were conducted on at least (1) cube from each aggregate sizes to determine their mechanical properties, Impact test was conducted on them to determine their effect on crushability. It is observed from the analysis of available data in this work that the strength of concrete cubes increased with an increase in aggregate sizes while the crushability of concrete cubes increases with a decrease in aggregate sizes.
Table of Content:
CERTIFICATION ii
DEDICATION eiii
ACKNOWLEDGEMENT iv
TABLE OF CONTENT v
LIST OF TABLES viii
LIST OF FIGURES ix
LIST OF PLATES x
ABSTRACT xi
CHAPTER ONE
INTRODUCTION 1
1.1 Scope of the Project 2
1.1.1 Aim 2
1.1.2 Objectives of the Project 2
1.1.3 Justification 3
CHAPTER TW0
LITERATURE REVIEW 4
2.1 Introduction 4
2.2 Origin and Geological Properties of Granite Rock 4
2.2.1 Mineral Composition 5
2.2.2 Chemical Composition 5
2.3 Physical Properties of Rock (Granite) 6
2.3.1 Density 6
2.3.2 Porosity 7
2.3.3 Permeability 7
2.3.4 Texture 8
2.4 Mechanical properties of Granite Rock 8
2.4.1 Strength 8
2.4.1.1 Compressive Strength 9
2.4.1.2 Hardness 10
2.4.2 Crushing Strength 12
2.4.2.1 Aggregate crushing value 12
2.4.2.2 Aggregate impact value 12
2.4.3 Abrasion Resistance Test 13
2.4.4 Impact drop weight test 14
2.4.5 Hardness Test 15
2.4.5.1 DESCRIPTION 16
CHAPTER THREE
RESEARCH AND METHODS 17
3.1 Sample Collection and Preparation 17
3.2 Laboratory Investigations 17
3.2.1 Impact test 18
3.2.2 Crushing 19
CHAPTER FOUR
RESULTS AND DISCUSSION 20
4.1 Results 20
4.1.1 Sieve Analysis of Aggregates after Impact Loading Test 20
4.1.2 Graph of 50% passing from impact loading against sieve sizes 24
4.1.3 Graph of 50% passing from milling against aggregate sizes 25
4.2 DISCUSSION 25
CHAPTER FIVE
5.1 CONCLUSION 28
5.2 RECOMMENDATION 28
REFERENCES 30
APPENDIX 32
LIST OF TABLES
Table 2.1: Percentage Composition of Mineral Constituent of Granite Rock 6
Table 2.2: Classification of uniaxial compressive strength 10
Table 2.3: Mohr’s Hardness Scale 11
Table 4.1: Table of impact loading test on concrete cubes 35
Table 4.1a: Table of sieve analysis obtained from 12.50mm aggregate size 36
Table 4.1b: Table of sieve analysis obtained from 10.00mm aggregate size 37
Table 4.1c: Table of sieve analysis obtained from 5.00mm aggregate size 38
Table 4.1d: Table of sieve analysis obtained from 4.00mm aggregate size 39
Table 4.1e: Table of sieve analysis obtained from 3.00mm aggregate size 40
Table 4.1f: Table of sieve analysis obtained from 2.36mm aggregate size 41
Table 4.1g: Table of sieve analysis obtained from 1.12mm aggregate size 42
Table 4.1h: Table of sieve analysis obtained from 0.60mm aggregate size 43
Table 4.1i: Table of 50% passing of aggregate from Impact loading 44
Table 4.1j: Table of different aggregate sizes with 50% passing
from milling 45
LIST OF FIGURES
Fig.3.1: Particle sizes 17
Fig.4.1a: Graph of % passing against sieve size for 12.50 mm aggregate size 20
Fig.4.1b: Graph of % passing against sieve size for 10.00 mm aggregate size 21
Fig.4.1c: Graph of % passing against sieve size for 5.00 mm aggregate size 21
Fig.4.1d: Graph of % passing against sieve size for 4.00 mm aggregate size 22
Fig.4.1e: Graph of % passing against sieve size for 3.00 mm aggregate size 22
Fig.4.1f: Graph of % passing against sieve size for 2.36 mm aggregate size 23
Fig.4.1g: Graph of % passing against sieve size for 1.12 mm aggregate size 23
Fig.4.1h: Graph of % passing against sieve size for 0.60 mm aggregate size 24
Fig.4.1i: Graph of 50%Passing from Impact Loading against Sieve Sizes 24
Fig.4.1r: Graph of 50%Passing from Milling against Aggregate Sizes 25
LIST OF PLATES
Plate 1.0: Curing tank 32
Plate 2.0: Picture of concrete cubes after curing 32
Plate 3.0 Impact loading test 33
Plate 4.0: Sieve Shaker 33
Plate 5.0: Ball milling Machine 34
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