UNIVERSITI TEKNOLOGI MARA
INVESTIGATION OF STEEL FIBRE REINFORCE CONCRETE SLAB UNDER
BENDING
Mira Ezwany Tumingan
Thesis submitted in fulfilment of the requirements for the degree of Master of Science Civil Engineering (Structure)
Faculty of Civil Engineering
February 2009
Candidate’s Declaration
I declare that the work in this thesis was carried out in accordance with the regulations of Universiti Teknoligi MARA. It is original and is the results of my own work, unless otherwise indicated or acknowledge as referenced work. This thesis has not been submitted to any other academic institution or non-academic institution for any other degree or qualification.
In the event that y thesis be found to violate the conditions mentioned above, I voluntarily waive the right of conferment of my degree and agree to be subjected to the disciplinary rules and regulations of Universiti Teknologi MARA.
Name of Candidate : MIRA EZWANY TUMINGAN Candidate’s ID : 2006652441
Programme : MASTER OF SCIENCE CIVIL ENGINEERING (STRUCTURE)
Faculty: CIVIL ENGINEERING
Thesis title: INVESTIGATION OF STEEL FIBRE REINFORCE CONCRETE SLAB UNDER BENDING
Signature of Candidate:
Date: February 2009
ABSTRACT
This research work presents the investigation and study on the application of steel fibre as reinforcement in concrete slab. The reinforced concrete samples were prepared previously in study made by Abdul Rahman (2008). The size of the SFRC slab is 1500x1000x75 mm (span-width-thickness). In this research, the SFRC slabs are tested for bending to investigate its structural behaviour. Unlike other research made on SFRC slab, no other reinforcement such as BRC was added to the slab.
Result from the experimental works is compared theoretically to BRC slab analysed using Esteem Software. The SFRC slabs has been prepared using 0.345 of water- cement ratio and 5kg (0.4%) dosage of hooked end steel fibre of 1200 MPa strength.
Initial grade 30 concrete was changed to grade 40 in order to achieve early high strength of the concrete mix. No admixtures were added to the concrete during batching process. The experimental work arrangement for the slab to be simply supported with load applied on the mid span of the slab. The load is applied incrementally until failure. There are numerous studies made on the addition of SFRC in concrete and prove that steel fibres increased the flexural and ultimate capacity of the plain concrete. This improvement includes fracture toughness, concrete ductility, better carrying capacity and enhances overall durability. It is hope from this study, the use of steel fibre will expand in construction industry in Malaysia.
TABLE OF CONTENTS
Declarations
Acknowledgement ii
Table of Contents iii
List of Figures vi
List of Tables vii
List of Appendices viii
Abstract ix
CHAPTER 1 INTRODUCTION
1.1 Introduction 1
1.2 Problem Statement 3
1.3 Objectives of the Study 4
1.4 Scope of the Study 4
1.5 Limitations 4
CHAPTER 2 LITERATURE REVIEW
2.1 Introduction 5
2.2 Effects of Steel Fibre Addition on Mechanical Properties Of
Concrete and RC Beams 6
2.3 Flexural Behaviour on Small Steel Fibre Reinforced Concrete Slab 9 2.4 Fatigue Behaviour of Fibre Reinforced Concrete in Compression 11 2.5 Corrosion of Steel Fibre Reinforced Concrete from the Cracks 13 2.6 Compressive Stress-Strain Relationship on SFRC at Early Stage 15 2 .7 Flexural Behaviour of Concrete Beam Reinforced With Glass Fibre
Reinforced Polymer (GFRP) 17
2.8 Influence of Steel Fibres on Strength and Ductility of Normal And
iii
Lightweight High Strength Concrete 19 2.9 Torsion of Steel Fibre Reinforced Concrete Members 20 2.10 Reproportioning of Steel Fibre Reinforced Concrete Mixes and Their
Impact Resi stance 21
CHAPTER 3 METHODOLOGY
3.1 Introduction 22
3.2 SFRC Slab Concrete Work 23
3.2.1 Steel Fibre 23
3.2.2 Concrete Mix Design 24
3.2.3 Batching 25
3.2.4 Mixing 25
3.3 Experimental Works 26
CHAPTER 4 RESULTS AND DISCUSSION
4.1 Introduction 30
4.2 Sample Specification 30
4.3 Experimental Results 31
4.3.1 Cube Test 31
4.3.2 Slump Test 32
4.3.3 Calculation of Deflection 32
4.3.4 Load-Displacement Response 33
4.3.5 Deformed Shape 36
4.3.6 Stress-Strain 37
4.3.7 Visual Observation 37
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