Bond behaviour of reinforcing bars embedded in steel fibre reinforced geopolymer concrete

2015 ◽  
Vol 67 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Namasivayam Ganesan ◽  
Pookatta V. Indira ◽  
Anjana Santhakumar
Keyword(s):  
Steel Fibre ◽  
Geopolymer Concrete ◽  
Reinforcing Bars ◽  
Bond Behaviour

Bond Behaviour of Frp Reinforcing Bars in High-Strength Steel Fibre-Reinforced Concrete

2007 ◽  
Vol 15 (7) ◽  
pp. 569-578 ◽  
Author(s):  
Jong-Pil Won ◽  
Chan-Gi Park ◽  
Hwang-Hee Kim ◽  
Sang-Woo Lee ◽  
Cheol Won
Keyword(s):  
Reinforced Concrete ◽  
High Strength Steel ◽  
High Strength Concrete ◽  
Steel Fibre ◽  
High Strength ◽  
Fibre Reinforced Concrete ◽  
Reinforcing Bars ◽  
Bond Behaviour ◽  
Steel Fibre Reinforced Concrete ◽  
Pullout Load

Current design trends for structures require the increased use of high-strength concrete, which has a compressive strength of over 80 MPa. Its enhanced strength, however, leads to brittle failure problems, which have been resolved by adding steel fibres. Fibre-reinforced polymer (FRP) is actively being studied to resolve the corrosion problems encountered with steel reinforcing bars in concrete structures exposed to adverse environmental conditions. In this study, we experimentally evaluated the bond behaviour of FRP reinforcing bars in high-strength steel fibre-reinforced concrete. A high-strength concrete mix was created with a target strength of over 80 MPa, and steel fibre was added. The FRP reinforcing bars had an increased pullout load with a slow gradient, and the slope of the pullout load reduction curve remained small after the maximum pullout load was reached. In addition, the bond strength increased as steel fibre was added to the FRP reinforcing bar.

Effect of Fibres on Bond Behaviour Under Impact Loading

1990 ◽  
Vol 211 ◽  
Author(s):  
Cheng Yan ◽  
Sidney Mindess
Keyword(s):  
Impact Loading ◽  
Steel Fibre ◽  
Polypropylene Fibre ◽  
Reinforcing Bars ◽  
Polypropylene Fibres ◽  
Bond Behaviour ◽  
Steel Fibres

AbstractThe bond between concrete and reinforcing bars under impact loading was studied for plain, polypropylene fibre reinforced, and steel fibre reinforced concretes. It was found that adding steel fibres significantly improved the bond behaviour under impact loading; polypropylene fibres had a much smaller effect.

scholarly journals Bond Stress between Steel-Reinforced Bars and Fly Ash-Based Geopolymer Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yifei Cui ◽  
Peng Zhang ◽  
Jiuwen Bao
Keyword(s):  
Construction Materials ◽  
Bond Stress ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Reinforcing Bars ◽  
Bond Behaviour ◽  
Relative Slip ◽  
Pull Out ◽  
Steel Bars ◽  
Commercial Steel

Geopolymer concrete has been regarded as one of the most important green construction materials, which has been restrained in engineering applications partially due to a lack of bond studies. The structural performance of the reinforced concrete components primarily relies on the sufficient bond between the concrete and the reinforcing bars. Before being utilized in any concrete structure, GPC must demonstrate that it possesses understandable bond behaviour with commercial steel reinforcements. This work presents an experimental investigation on the bond stress of steel bars in reinforced geopolymer concrete (GPC) structures. Standard beam-end pull-out tests were conducted on GPC specimens reinforced with 16 mm plain and ribbed bars that were equipped with electrical resistance strain gauges. The longitudinal variation in the bond stress in the GPC beams during the pull-out tests was calculated and plotted, as well as the stress in steel bars. The cracks on the bond area of the GPC were compared with those of the corresponding ordinary Portland cement concrete (OPC), as well as the steel stress and bond stress. The results showed that the relative slip between plain bar and geopolymer concrete varies from 30–450 microns from the loaded end to the free end when the bond stress decreased by 83%. The relative slip between ribbed bar and geopolymer concrete varies from 280–3,000 microns from the loaded end to the free end when the bond stress decreased by 57%. Generally, GPC is different from OPC in terms of bond stress distribution.

scholarly journals Experimental Studies on Punching Shear and Impact Resistance of Steel Fibre Reinforced Slag Based Geopolymer Concrete

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Srinivasan Karunanithi
Keyword(s):  
Energy Absorption ◽  
Steel Fibre ◽  
Impact Load ◽  
Impact Resistance ◽  
Experimental Studies ◽  
Absorption Capacity ◽  
Punching Shear ◽  
Geopolymer Concrete ◽  
Energy Absorption Capacity ◽  
Ultimate Failure

The study was focused on slag based geopolymer concrete with the addition of steel fibre. The slag based geopolymer concrete was under shear load and sudden impact load to determine its response. The punching shear represents the load dissipation of the material and the energy absorption capacity of the geopolymer concrete to impact load. The various percentage of steel fibre in the slag based geopolymer concrete was 0.5%, 1.0%, and 1.5%. Overall the dosage 0.5% of steel fibre reinforced slag based geopolymer shows better results with a punching shear of 224 kN and 1.0% of steel fibre incorporated geopolymer concrete had the better energy absorption capacity with 3774.40 N·m for first crack toughness and 4123.88 N·m for ultimate failure toughness.

Behaviour of Ambient Cured Steel Fibre Reinforced Geopolymer Concrete Columns Under Axial and Flexural Loads

Structures ◽  
2018 ◽  
Vol 15 ◽  
pp. 184-195 ◽  
Author(s):  
Nabeel A. Farhan ◽  
M. Neaz Sheikh ◽  
Muhammad N.S. Hadi
Keyword(s):  
Steel Fibre ◽  
Concrete Columns ◽  
Geopolymer Concrete

scholarly journals Bond behaviour of steel-reinforcing bars in Crumb Rubber Concrete (CRC)

2019 ◽  
Vol 18 (1) ◽  
pp. 2-17 ◽  
Author(s):  
Danda Li ◽  
Rebecca Gravina ◽  
Yan Zhuge ◽  
Julie E. Mills
Keyword(s):  
Crumb Rubber ◽  
Reinforcing Bars ◽  
Bond Behaviour ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

scholarly journals EXPERIMENTAL STUDY OF THE BOND BEHAVIOUR OF REINFORCING BARS SUBJECTED TO THE SIMULTANEOUS PUSH AND PULL

1982 ◽  
Vol 322 (0) ◽  
pp. 52-63
Author(s):  
TOSHIYUKI MORIMOTO ◽  
SHIZUO HAYASHI ◽  
TOSHIO YOSHIDA ◽  
SEIJI KOKUSHO
Keyword(s):  
Experimental Study ◽  
Reinforcing Bars ◽  
Bond Behaviour ◽  
Push And Pull

scholarly journals Influence of Various Types of Steel Fibre on the Mechanical and Physical Characteristics of GGBS Based Geopolymer Concrete

2020 ◽  
pp. 7-19
Author(s):  
M. Ali Sadawy ◽  
Ahmed Serag Faried ◽  
H. A. El-Ghazaly
Keyword(s):  
Steel Fibre ◽  
Volume Fraction ◽  
Setting Time ◽  
Geopolymer Concrete ◽  
Steel Fibres ◽  
Granulated Blast Furnace Slag ◽  
Concrete Mixtures ◽  
Flow Test ◽  
Mechanical And Physical Properties ◽  
Compressive And Flexural Strengths

This study provides experimental investigation of the mechanical and physical properties of reinforced geopolymer concrete based on Ground Granulated Blast Furnace Slag (GGBS). This research demonstrates the influence of various types of steel fibre on compressive, split tensile, flexural strengths and elastic modulus of hardened GPC, workability of reinforced geopolymer concrete and also analyzed the workability, setting time and flow test of fresh geopolymer concrete. Additionally, corrosion test was conducted on reinforced geopolymer concrete. Mixtures of alkaline liquid to GGBS ratio of 0.5 with steel fibers had been added to the mixture of 0% volume fractions (Vf %), 0.5%, 1.0%, and 1.5% concrete amount. Based on the result of the experiments, the presence of steel fibres enhanced the compressive and tensile strength of the SERGPC, in terms of volume fraction of steel fibres as compared to the regular GPC without fibres. It was observed that there was a significant improvement in GPC's mechanical characteristics and corrosion rate as the lifespan of concrete increased. The incorporation of steel fibres resulted in increased compressive and flexural strengths in the early age and consequently tensile splitting power was increased. The increase in concrete geopolymer content improved the rate of corrosion over time.

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