Effect of Steel Fibres on Flexural Toughness of Concrete and RC Beams

2021 ◽  
Author(s):  
Fuat Köksal ◽  
Kuppala Srinivasa Rao ◽  
Ziyafeddin Babayev ◽  
Mehmet Kaya
Keyword(s):  
Rc Beams ◽  
Steel Fibres ◽  
Flexural Toughness

Flexural Toughness of Concrete with High Performance Polymers

2013 ◽  
Vol 687 ◽  
pp. 480-484
Author(s):  
Chee Seong Chin ◽  
Robert Yong Xiao
Keyword(s):  
High Performance ◽  
Plain Concrete ◽  
Cost Effective ◽  
Absorption Capacity ◽  
Sustainable Construction ◽  
Peak Performance ◽  
Steel Fibres ◽  
Flexural Toughness ◽  
High Performance Polymer ◽  
Potential Alternative

Flexural toughness is a measure of energy absorption capacity and characterization of material’s ability to resist fracture under flexure loads. Concrete, when unreinforced, behaves generally well in compression but its flexural behaviour particularly the post-peak performance is rather weak and brittle. Conventional method has been to include steel fibres to enhance the flexural capacity but was discouraged by their impractically heavy cost and weight constraints. This paper presents the use of high performance polymeric fibres as a cost-effective and lightweight potential alternative which also fits well into the modern era of sustainable construction seeing that they leaves substantially lower carbon footprint compared to steel. Mechanically deformed high performance polymer (HPP) made of 100 percent virgin polypropylene was adopted and incorporated into concrete mixes and its composite performance was experimentally investigated and compared to plain concrete and those reinforced by steel fibres. An analytical method to predict the overall flexural toughness response has also been proposed and verified.

Strength and Ductility Performance of GFRP Laminated RC Beams with Discrete Steel Fibres

2022 ◽  
pp. 12-28
Author(s):  
S. Syed Ibrahim ◽  
S. Kandasamy ◽  
S. Pradeepkumar ◽  
R. Subashchandrabose
Keyword(s):  
Rc Beams ◽  
Steel Fibres ◽  
Strength And Ductility

scholarly journals Laboratory Tests of Concrete Beams Reinforced with Recycled Steel Fibres and Steel Bars

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6752
Author(s):  
Małgorzata Pająk ◽  
Grzegorz Wandzik
Keyword(s):  
Tensile Tests ◽  
Image Correlation ◽  
Partial Replacement ◽  
Rc Beams ◽  
Bending Tests ◽  
Steel Fibres ◽  
Four Point Bending ◽  
Steel Bars ◽  
Cracking Pattern ◽  
Recycled Steel

This paper explores the possibility of the partial replacement of the longitudinal reinforcement in reinforced concrete (RC) beams with recycled steel fibres (RSF). Testing was focused on the contribution of two volume ratios of the RSF—0.5%, 1.0%. Basic compression and flexural tensile tests were performed to evaluate the effectiveness of the fibres following current standards. Additionally, the full-scale beams with and without conventional reinforcement were subjected to four-point bending tests. The results indicate that RSF improved the load-bearing capacity of the RC beams. Cooperation of RSF with the steel bars in carrying loads was proved. Findings from the Digital Image Correlation (DIC) revealed no impact on the cracking pattern of the RC beams.

scholarly journals Shear strengthening of RC beams with thin panels of mortar reinforced with recycled steel fibres

2018 ◽  
Vol 194 ◽  
pp. 112-126 ◽  
Author(s):  
Lúcio Lourenço ◽  
Ziaaddin Zamanzadeh ◽  
Joaquim A.O. Barros ◽  
Mohammadali Rezazadeh
Keyword(s):  
Rc Beams ◽  
Shear Strengthening ◽  
Steel Fibres ◽  
Recycled Steel

Reliability Based Design of RC Beams With Recycled Aggregate and Steel Fibres

Structures ◽  
2017 ◽  
Vol 11 ◽  
pp. 135-145 ◽  
Author(s):  
Won-Hee Kang ◽  
Rakul Bharatwaj Ramesh ◽  
Olivia Mirza ◽  
Sepani Senaratne ◽  
Vivian Tam ◽  
...  
Keyword(s):  
Recycled Aggregate ◽  
Rc Beams ◽  
Steel Fibres ◽  
Reliability Based Design

scholarly journals Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres

2020 ◽  
Vol 10 (21) ◽  
pp. 7587 ◽  
Author(s):  
Mansour Ghalehnovi ◽  
Arash Karimipour ◽  
Jorge de Brito ◽  
Hamid Reza Chaboki
Keyword(s):  
Reinforced Concrete ◽  
Crack Width ◽  
Coarse Aggregate ◽  
Concrete Beams ◽  
Rc Beams ◽  
Aggregate Concrete ◽  
Bending Performance ◽  
Steel Fibres ◽  
Recycled Coarse Aggregate ◽  
The Impact

Reducing the crack width is a vital feature for protecting rebars from corrosion. In this investigation, the impact of steel fibres (SFs) on the cracking of recycled coarse aggregate reinforced concrete (RCARC) beams was investigated. Twenty-seven reinforced concrete (RC) experimental samples (150 mm × 200 mm × 1500 mm) were manufactured. Shear rebars were considered with different spacings. Specimens were tested under a four-point flexural setup. Recycled coarse aggregate (RCA) from a destroyed building was employed at 0%, 50% and 100% by weight. SFs were added at three contents (0%, 1% and 2%) in order to reduce the crack width. The mid-span load–displacement relationship and the crack propagation and width were measured during the tests. Therefore, this study intended to assess the impact of utilising RCA and natural coarse aggregate on cracks’ spacing and propagation in RC beams when SFs were employed. The obtained outcomes were compared with the requirements of CSA S474, NS 3473E, EC2-04, CEB-FIP and ACI 224R-01. It was found that enough shear rebars should be provided through the beams to control the crack width and propagation, but that SFs enhanced the bending performance of RCARC with no shear rebars.

Behavior of RC Beams Strengthened by CFRP and Steel Rope under Frequent Impact Load

2018 ◽  
Vol 1 (1) ◽  
pp. 30-42
Author(s):  
Muataz Ali ◽  
◽  
Yaseen Saleh ◽  
Luna Al Hasani ◽  
Ammar Khazaal ◽  
...  
Keyword(s):  
Impact Load ◽  
Rc Beams ◽  
Steel Rope

Structural performance of steel fibre reinforced concrete — Part IV. Toughness properties

2014 ◽  
Vol 5 (2) ◽  
pp. 119-125
Author(s):  
I. Kovács
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Fibre Orientation ◽  
Reinforced Concrete Beams ◽  
Fibre Reinforcement ◽  
Fibre Reinforced Concrete ◽  
Flexural Toughness ◽  
Steel Fibre Reinforced Concrete ◽  
Set Up ◽  
Flexural Tests

The present paper of a series deals with the experimental characterisation of flexural toughness properties of structural concrete containing different volume of hooked-end steel fibre reinforcement (75 kg/m3, 150 kg/m3). Third-point flexural tests were carried out on steel fibre reinforced concrete beams having a cross-section of 80 mm × 85 mm with the span of 765 mm, hence the shear span to depth ratio was 3. Beams were sawn out of steel fibre reinforced slab elements (see Part I) in order to take into consideration the introduced privilege fibre orientation (I and II) and the position of the beam (Ba-a, Ba-b, Ba-c) before sawing (see Part I). Flexural toughness properties were determined considering different standard specifications, namely the method of the ASTM (American Standards for Testing Materials), the process of the JSCE (Japan Society of Civil Engineering), and the final proposal of Banthia and Trottier for the post cracking strength. Consequently, behaviour of steel fibre reinforced concrete was examined in bending taking into consideration different experimental parameters such as fibre content, concrete mix proportions, fibre orientation, positions of test specimens in the formwork, while experimental constants were the size of specimens, the type of fibre used and the test set-up and test arrangement.

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