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Determination Of The Characteristic Strength Properties Of Mild Steel Reinforcement
[A CASE STUDY OF ILORIN METROPOLIS] -
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2.5 STEEL REINFORCEMENT
There are two ways to specify structural steels. The common way in particular for the grades of steel specified by the nationally known and respected trade associated, the American Institute construction (AISC) is to use an ASTM (American Society for testing and Materials) and the second manner of specifying steel is by means of an AISI (American Iron and steel institute) number.
In the ASTM system, each structural steel has a number designation referring to the standard that defines the required minimum properties. The designation has the prefix letter A followed by one, two or three numerals.
The AISI use a four-digit code to defend steel. The last two digits indicate the average percentage of carbon in the steel. The most common type of reinforcing steel for concrete consists of bars, wires and welded fabrics, all of which are manufactured in accordance with ASTM standards. The most important properties of reinforced steel are:
i. Field strength, fy
ii. Young’s modulus, fu
iii. Ultimate strength, Fu
iv. Steel grade designation
v. Size or diameter of the bar or wire (Knowles,1987).
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT WILL BE HERE SOON ... Continue reading---
APPENDIX A - [ Total Page(s): 6 ] ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTS CHAPTER ONE 1.0   Introduction 1.2   Statement of the Problem  1.3    Aim and Objectives of the Study 1.4   Justification of the Study     1.5   Scope of the Study  1.6   Proposed Methodology  CHAPTER TWO2.0 Literature Review 2.1 Nigerian Steel Industry (Historical Development) 2.2 Engineering Materials and Properties 2.2.1 Cement and Concrete  2.2.2 Aggregates and Sand 2.2.3 Timber and Plywood  2.3 Strength of Materials ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONE 1.0   INTRODUCTION    Steel is a man-made material containing 95% of iron. The remaining constituent are small amount of element derived from the raw-material use in the making of the steel, as well as other element added to improve certain characteristics or properties of the product (Marcus, 1964).   Steel reinforcement are used generally in the form of bars of circular cross-section in concrete structure. They are like a skeleton in human body. Plain concrete without s ... Continue reading---
CHAPTER THREE - [ Total Page(s): 3 ]3.3.2 Principle of OperationWith every 2 revolutions made on the hand or motor driven gear box of high mechanical advantage, a force of 20kN (2000kgf) is applied to a test piece held in the chuck pins. The force deflects the spring beam and this deflection operates a level acting on a piston in a cylinder containing mercury. It should be noted that the mercury inside the sleeve must be at zero point before the drive is made, and this can be alone using the mercury adjuster. The recording graph i ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 8 ]vii.   ELASTIC MODULUSThis is the slope of the straight line portion of each curveSpecimen 1 =(change in stress)/(change in strain) = 295/0.012 = 24583 N/〖mm〗^2Specimen 2 =  240/(0.018 )  = 13333N/〖mm〗^2Specimen 3 = 220/0.012 = 20000N/〖mm〗^2Therefore:Average elastic modulus =  (24583+13333+20000 )/3 = 19305N/〖mm〗^24.1.4 ANALYSIS FOR 16mm MILD STEEL SPECIMENSi. ULTIMATE STRENGTH OR TENSILE STRENGTHSpecimen 1 = 489.48N/ã₠... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVE5.0 CONCLUSION AND RECOMMENDATION From the test carried out and the results obtained, the average yield strength for specimens diameter of 8mm, 10mm, 12mm, 16mm, 2Omm and 25mm were 79N/mm2, 225 N/mm2, 261 N/mm2, 277 N/mm2, 295 N/mm2 and 297 N/mm2 respectively. It was therefore observed that specimen of 8mm and 10m do not meet the BS8110 specification of 250 N/mm2 for mild steel.However, the analysis shows that the average ultimate strength obtained for the specimens of 8mm, 10mm 12mm ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESAlbert, G.G., (1960), ‘Elements of Physical Metallurgy’, 2 Edition, Addison Wesley Publishing Co. Inc., London, pp337-340Arthur, H.N., et aL, (2004), ‘Design of Concrete Structures’, 13th Edition, Tata McGraw Hill Companies, India, pp38-50Bakare, O.S., (2006), Thesis on Determination of Ultimate Tensile Strength of High Tensile Steel Specimens, Civil Engineering Department, University of Ilorin, Nigeria.Kenneth. L -. Dionisio. B.. (1997), ‘Reinforced con ... Continue reading---
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT WILL BE HERE SOON ... Continue reading---