scholarly journals Flexural Behavior of Basalt Fiber Reinforced Polymer Tube Confined Coconut Fiber Reinforced Concrete

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Yang Lv ◽  
Xueqian Wu ◽  
Mengran Gao ◽  
Jiaxin Chen ◽  
Yuhao Zhu ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Basalt Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced Polymer ◽  
Control Group ◽  
Fiber Reinforced ◽  
Coconut Fiber ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

Basalt fiber has arisen new perspectives due to the potential low cost and excellent mechanical performance, together with the use of environmental friendly coir can be beneficial to the development of sustainable construction. In this study, a new composite structure called basalt fiber reinforced polymer (BFRP) tube encased coconut fiber reinforced concrete (CFRC) is developed. The 28-day compression strength of the plain concrete is about 15 MPa, which represents the low-strength poor-quality concrete widely existing in many old buildings and developing countries. Three types of BFRP tubes, i.e., 2-layer, 4-layer, and 6-layer, with the inner diameter of 100 mm and a length of 520 mm, were prepared. The plain concrete (PC) and CFRC were poured and cured in these tubes to fabricated BFRP tube confined long cylindrical beams. Three PC cylindrical beams and 3 CFRC cylindrical beams were prepared to be the control group. The four-point bending tests of these specimens were carried out to investigate the enhancement due to the BFRP tube and coir reinforcement. The load-carrying capacity, force-displacement relationship, failure mode, and the cracking moment were analyzed. Results show that both BFRP tube confined plain concrete (PC) and BFRP tube confined CFRC have excellent flexural strength and ductility, and the inclusion of the coir can further enhance the ductility of the concrete.

scholarly journals Compression Behavior of Basalt Fiber-Reinforced Polymer Tube-Confined Coconut Fiber-Reinforced Concrete

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Yang Lv ◽  
Xueqian Wu ◽  
Yuhao Zhu ◽  
Xiao Liang ◽  
Quanxi Cheng ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Compression Strength ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Coconut Fiber ◽  
Reinforced Polymer ◽  
Inner Diameter

Basalt fiber is cheap and has excellent mechanical performance. In addition, in combination with the environmentally friendly coconut fiber, it can contribute to sustainable construction materials. In this study, a composite material consists of basalt fiber-reinforced polymer (BFRP) tube-encased coconut fiber-reinforced concrete (CFRC) is developed. The 28-day compression strength of the plain concrete is about 15 MPa, which represents the low strength and poor-quality concrete widely existing in a large number of old buildings. The concrete was poured and cured into the steel moulds, BFRP tubes with the inner diameter of 100 mm and a height of 200 mm, and BFRP tubes with the inner diameter of 160 mm and a height of 320 mm, respectively. In total, 36 cylindrical specimens were constructed and tested. The axial compression tests were carried out to examine the strength and ductility enhancement due to the confinement of the BFRP tubes and coconut fibers. Also, the existing models were used to predict the ultimate axial compression strength and strain. The results show that the size of the specimen significantly influences the predicted compression strength.

scholarly journals Serviceability and Flexural Behavior of Concrete Beams Reinforced with Basalt Fiber-Reinforced Polymer (BFRP) Bars Exposed to Harsh Conditions

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2110
Author(s):  
Hakem Alkhraisha ◽  
Haya Mhanna ◽  
Noor Tello ◽  
Farid Abed
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Basalt Fiber ◽  
Reinforcement Ratio ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Flexural Capacity ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

The main objective of this study was to investigate experimentally and numerically the behavior of basalt fiber-reinforced polymer (BFRP) reinforcement exposed to a combination of ultraviolet rays, humidity, and rain. Specifically, the effects of the previously stated harsh exposure on the serviceability performance and flexural capacity of BFRP reinforced concrete beams was examined. Holding the exposure parameter constant, the study also evaluated the effects of reinforcement ratio and beam detailing on the flexural capacity and the bond-dependent coefficient (kb) of the beams. Seven beams were cast and tested, four of which were reinforced with exposed BFRP bars, two were reinforced with unexposed BFRP bars, and one specimen was cast and reinforced with steel bars to serve as a benchmark specimen. The results indicate that the kb factor was averaged to be 0.61 for all the beams. Test results also indicate that increasing the reinforcement ratio did not result in a directly proportional increase in the moment capacity. The period of exposure did not cause any significant impact on the behavior of the over-reinforced beams. Thus, a finite element model was created to simulate the impact of exposure on the behavior of under-reinforced BFRP reinforced concrete beams.

Behavior of RC box beam strengthened with basalt FRP using end anchorage with grooving

2019 ◽  
Vol 53 (23) ◽  
pp. 3307-3324 ◽  
Author(s):  
Dejian Shen ◽  
Xuan Zeng ◽  
Jinyang Zhang ◽  
Baizhong Zhou ◽  
and Wei Wang
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Basalt Fiber ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Box Beam ◽  
Average Crack ◽  
Basalt Fiber Reinforced Polymer

In recent days, many structures are strengthened with fiber-reinforced polymer to make use of the existing reinforced concrete structures to the current needs. Although investigations on the behavior of undamaged fiber-reinforced polymer-strengthened reinforced concrete beams anchored with U-strips have been conducted, study on the behavior of RC box beams strengthened with basalt fiber-reinforced polymer using end anchorage with grooving is still lacking. In the present study, the failure mode, ductility, stiffness, and loading-carrying capacity of an RC box beam strengthened with basalt fiber-reinforced polymer using end anchorage with grooving were experimentally and analytically investigated. Test results and analysis showed that: (1) the average crack spacing, average crack depth, and average crack width of specimen anchored with grooving decreased by 10.3%, 2.8%, and 6.2% when compared with that of specimen anchored with U-strips, respectively; (2) the failure mode of specimen anchored with grooving was basalt fiber-reinforced polymer debonding in pure bending zone; (3) the deflection or curvature ductility of specimen anchored with grooving was 33.9% or 32.7% lower than that of specimen anchored with U-strips; (4) a model based on built-up bars for the load-carrying capacities of BFRP-strengthened beams anchored with grooving was proposed.

Research of the Properties of Basalt Fiber Reinforced Polymer Bar for Continuously Reinforced Concrete Pavement

2014 ◽  
Vol 505-506 ◽  
pp. 184-187
Author(s):  
Qi Yang Liu ◽  
Ming He
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Matrix Material ◽  
Basalt Fiber ◽  
Concrete Pavement ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Contraction Joints ◽  
Basalt Fiber Reinforced Polymer

Continuously reinforced concrete pavement (CRCP) does not require any contraction joints which is a high-performance pavement structure type that just need a sufficient number of reinforced pavement longitudinal configuration to constrain sideway random crack width. With continuous basalt fiber as reinforced material and synthetic resin as the matrix material and adding appropriate adjuvants, basalt fiber reinforced polymer (BFRP) bar form a new type of material after pultrusion processing and surface treatment technologies. BFRP on the mechanical properties were studied by two kinds of test methods which are using extensometer strain detection and fiber optic strain sensing and the parameter of homegrown BFRP bars mechanical properties. Because of the lower tensile elastic modulus of BFRP bars compared with rebar, the mechanical properties of basalt fiber-steel wire composite bar has been studied along with the research corrosion and flexural properties of BFRP bar.

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