scholarly journals Durability and Mechanical Properties of Concrete Reinforced with Basalt Fiber-Reinforced Polymer (BFRP) Bars: Towards Sustainable Infrastructure

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1402
Author(s):  
Osama Ahmed Mohamed ◽  
Waddah Al Hawat ◽  
Mohammad Keshawarz
Keyword(s):  
Carbon Steel ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Sustainable Infrastructure ◽  
Reinforced Polymer ◽  
Reinforced Beams ◽  
Minimal Environmental Impact ◽  
Basalt Fiber Reinforced Polymer

Reducing the fingerprint of infrastructure has become and is likely to continue to be at the forefront of stakeholders’ interests, including engineers and researchers. It necessary that future buildings produce minimal environmental impact during construction and remain durable for as long as practicably possible. The use of basalt fiber-reinforced polymer (BFRP) bars as a replacement for carbon steel is reviewed in this article by examining the literature from the past two decades with an emphasis on flexural strength, serviceability, and durability. The provisions of selected design and construction guides for flexural members are presented, compared, and discussed. The bond of BFRP bars to the surrounding concrete was reportedly superior to carbon steel when BFRP was helically wrapped and sand coated. Experimental studies confirmed that a bond coefficient kb = 0.8, which is superior to carbon steel, may be assumed for sand-coated BFRP ribbed bars that are helically wrapped, as opposed to the conservative value of 1.4 suggested by ACI440.1R-15. Code-based models overestimate the cracking load for BFRP-reinforced beams, but they underestimate the ultimate load. Exposure to an alkaline environment at temperatures as high as 60 °C caused a limited reduction in bond strength of BFRP. The durability of BFRP bars is influenced by the type of resin and sizing used to produce the bars.

scholarly journals Durability of beams with hybrid reinforcement from metal and basalt fiber reinforced polymer (BFRP) armature

2018 ◽  
Vol 230 ◽  
pp. 02035 ◽  
Author(s):  
Alexander Valovoi ◽  
Peter Koval ◽  
Alexander Eremenko ◽  
Maksim Valovoi ◽  
Sergei Volkov
Keyword(s):  
Quartz Sand ◽  
Fine Fraction ◽  
Basalt Fiber ◽  
Experimental Tests ◽  
Fiber Reinforced Polymer ◽  
Fine Aggregate ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Reinforced Beams ◽  
Basalt Fiber Reinforced Polymer

The article presents the program and the results of experimental tests of beam samples with metal, basalt fiber reinforced polymer (BFRP) and hybrid (metal and BFRP) reinforcement. The samples were made of standard concrete with quartz sand as the fine aggregate and concrete with fine fraction wastes of a mining and beneficiation complex (MBC) used instead of the sand. Short-run tests of the beams under monotonous static loading until destruction enabled the conclusion that durability of the BFRP reinforced beams increased by 37-44% as compared to the metal reinforced beams. When hybrid reinforcing, reduction of the (BFRP) content did not produce an effect on decrease of durability indices; durability gains compared to the beams reinforced by metal made 38-41%. In the BFRP reinforced beams, due to the absence of plastic deformations in this reinforcement, there were no residual deformations after cessation of loading despite significant damage and deterioration of the concrete. Samples of beams made of concrete on fine fraction wastes of MBC, showed 1-8% higher strengths in comparison with similar beams made of concrete with quartz sand as the fine aggregate.

Compressive Behavior of Circular Concrete Columns Confined by Basalt Fiber Reinforced Polymer (BFRP)

2018 ◽  
Vol 765 ◽  
pp. 355-360 ◽  
Author(s):  
Sakol Suon ◽  
Shahzad Saleem ◽  
Amorn Pimanmas
Keyword(s):  
Basalt Fiber ◽  
Concrete Columns ◽  
Primary Objective ◽  
Fiber Reinforced Polymer ◽  
Small Scale ◽  
Fiber Reinforced ◽  
Compressive Behavior ◽  
Reinforced Polymer ◽  
Ductile Behavior ◽  
Basalt Fiber Reinforced Polymer

This paper presents an experimental study on the compressive behavior of circular concrete columns confined by a new class of composite materials originated from basalt rock, Basalt Fiber Reinforced Polymer (BFRP). The primary objective of this study is to observe the compressive behavior of BFRP-confined cylindrical concrete column specimens under the effect of different number of layers of basalt fiber as a study parameter (3, 6, and 9 layers). For this purpose, 8 small scale circular concrete specimens with no internal steel reinforcement were tested under monotonic axial compression to failure. The results of BFRP-confined concrete specimens of this study showed a bilinear stress-strain response with two ascending branches. Consequently, the performance of confined columns was improved as the number of BFRP layer was increased, in which all the specimens exhibited ductile behavior before failure with significant strength enhancement. The experimental results indicate the well-performing of basalt fiber in improving the concrete compression behavior with an increase in number of FRP layers.

Relaxation behavior of prestressing basalt fiber-reinforced polymer tendons considering anchorage slippage

2016 ◽  
Vol 51 (9) ◽  
pp. 1275-1284 ◽  
Author(s):  
Jianzhe Shi ◽  
Xin Wang ◽  
Huang Huang ◽  
Zhishen Wu
Keyword(s):  
Relaxation Rate ◽  
Basalt Fiber ◽  
Relaxation Behavior ◽  
Fiber Reinforced Polymer ◽  
Initial Stresses ◽  
Fiber Reinforced ◽  
Relaxation Rates ◽  
Reinforced Polymer ◽  
Relaxation Loss ◽  
Basalt Fiber Reinforced Polymer

Relaxation is a key factor that controls the application of prestressing fiber-reinforced polymer tendons. This paper focuses on the evaluation of the relaxation behavior of newly developed basalt fiber-reinforced polymer tendons through an approach considering anchorage slippage. A series of relaxation tests on basalt fiber-reinforced polymer tendons subjected to three levels of initial stresses (0.4 fu, 0.5 fu, and 0.6 fu, where fu = ultimate strength) were conducted using a specially designed test setup that eliminates the impact of slippage at the anchor zone. An additional group of tests was conducted to validate the enhancement effect of pretension on the relaxation behavior. The relaxation rates at one million hours were predicted based on experimental fitting. Finally, the relaxation rates at 1000 h were predicted using the correlation between the relaxation and creep and were validated with the experimental relaxation rates. The results demonstrate the effectiveness of the proposed setup in measuring the relaxation loss of specimens and reveal that the relaxation rates of untreated basalt fiber-reinforced polymer tendons at 1000 h are 4.2%, 5.3%, and 6.4% at 0.4 fu, 0.5 fu, and 0.6 fu, respectively. Pretension treatment performs effective in relaxation loss controlling. BFRP tendons are recommended to be applied at an initial stress of 0.5 fu after pretension treatment, with one-million-hour relaxation rate equal to 6.7%. Furthermore, the relaxation rate at 1000 h can be predicted accurately based on the creep behavior. The conclusions of this study can provide guidance for the prestressing applications of basalt fiber-reinforced polymer tendons.

scholarly journals Impact Properties of Nanomodified Basalt Fiber Reinforced Polymer Composites

2019 ◽  
Vol 9 (1) ◽  
pp. 5839-5844
Keyword(s):  
Polymer Composite ◽  
Impact Load ◽  
Basalt Fiber ◽  
Optical Microscope ◽  
Fiber Reinforced Polymer ◽  
Low Velocity Impact ◽  
Fiber Reinforced ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

Basalt fibre reinforced polymer composite is a newly versatile material that has good potential to be used in many applications due to its high specific modulus and strength properties. This paper is aimed to evaluate the response and properties of BFRP composite when it is subjected to low-velocity impact loading. The BFRP laminates were fabricated using vacuum bagging method. The effects of 5, 10 and 15wt% nanosilica particles on density, impact load and energy absorbed were investigated using a drop weight impact test. The damage characteristics of the samples were examined using an optical microscope. The addition of 15wt% nanosilica into Basalt fiber reinforced polymer composite significantly improved the energy absorption properties of the specimens. This suggests that the nanomodified BFRP composite has better damage resistance properties when compared to the pure system.

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