• Title/Summary/Keyword: Basalt fiber

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The Considerations on Flexural Performance of RC Beam Strengthened with Basalt Fibers (Basalt 섬유로 보강된 철근콘크리트 보의 휨 성능 고찰)

  • 심종성;문도영;박성재;박경동
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.10a
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    • pp.599-604
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    • 2002
  • Fibers have been used to improve tile flexural performance of reinforced concrete. Therefore many different kinds of fibers have been developed and tested to reinforcing concrete. Basalt fiber is one of the recently developed materials for this purpose. Basalt fiber produced from this basalt raw material has high initial strength and durability. But, the main advantages of the basalt fiber are resistance to high operating temperatures and lower modulus and chemical resistance compared to fiberglass. Also basalt fiber may be consumed as a potential replacement for expensive carbon fibers.

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Engineering Property of Basalt Fiber as a Reinforcing Fiber (보강 섬유로서 현무암 섬유의 공학적 특성)

  • Choi, Jeong-Il;Jang, Yu-Hyun;Lee, Jae-Won;Lee, Bang-Yeon
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.3 no.1
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    • pp.84-89
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    • 2015
  • Basalt fiber has many advantages as a reinforcing fiber such as high tensile strength and similar density to concrete. This study investigated the bonding property and the effect of fiber orientation on tensile strength of basalt fiber. Single fiber pullout tests for basalt and polyvinyl alcohol (PVA) fibers were performed to evaluate the bonding property between basalt fiber and mortar. And then tensile strength of basalt, PVA, and polyethylene (PE) fibers according to fiber orientation were measured. From the test results, it was exhibited that the chemical bond, frictional bond, and slip-hardening coefficient of basalt fiber were 1.88, 1.03, 0.24 times of PVA fibers, respectively. And the strength reduction coefficient of basalt fiber was 9 times of PVA fiber and 3 times of PE fiber.

The Fundamental Study on the Behavior of Deck Slab Reinforced Basalt Fiber (Basalt 콘크리트 섬유보강 상판의 거동에 관한 기초적 연구)

  • Seo, Seung-Tag
    • Journal of the Korean Society of Industry Convergence
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    • v.14 no.1
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    • pp.1-7
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    • 2011
  • Basalt originates from volcanic magma and flood volcanoes, a very hot fluid or semifluid material under the earth's crust, solidified in the open air. Basalt is a common term used for a variety of volcanic rocks, which are gray, dark in colour, formed from the molten lava after solidification. Recently, attention has been devoted to continuous basalt fibers (CBF) whose primary advantage consists in their low cost, good resistance to acids and solvents, and good thermal stability. In order to investigate reinforcement effect, this paper did FEM analysis with shell element. The result were as follows; BCF deck plate did elastic behavior to 450 kN, reinforcement effect of basalt fiber (BF) was less. But BCF's perpendicular deflection occurred little about 23 mm comparing with RC deck plate in load 627 kN. Stiffness was very improved by basalt fiber reinforcement.

Influence of Fiber Array Direction on Mechanical Interfacial Properties of Basalt Fiber-reinforced Composites (현무암섬유 섬유 배향에 따른 현무암섬유 강화 복합재료의 기계적 계면특성 영향)

  • Kim, Myung-Seok;Park, Soo-Jin
    • Polymer(Korea)
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    • v.39 no.2
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    • pp.219-224
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    • 2015
  • In this work, the effect of fiber array direction including $0^{\circ}$, $0^{\circ}/90^{\circ}$, $0^{\circ}/45^{\circ}/-45^{\circ}$ was investigated for mechanical properties of basalt fiber-reinforced composites. Mechanical properties of the composites were studied using interlaminar shear strength (ILSS) and critical stress intensity factor ($K_{IC}$) measurements. The cross-section morphologies of basalt fiber-reinforced epoxy composites were observed by scanning electron microscope (SEM). Also, the surface properties of basalt fibers were determined by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). From the results, it was observed that acid treated basalt fiber-reinforced composites showed significantly higher mechanical interfacial properties than those of untreated basalt fiber-reinforced composites. These results indicated that the hydroxyl functional groups of basalt fibers lead to the improvement of the mechanical interfacial properties of basalt fibers/epoxy composites in the all array direction.

Influence of Angle Ply Orientation on the Flexural Strength of Basalt and Carbon Fiber Reinforced Hybrid Composites

  • Mengal, Ali Nawaz;Karuppanan, Saravanan
    • Composites Research
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    • v.28 no.1
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    • pp.1-5
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    • 2015
  • In this paper the influence of fiber orientation of basalt and carbon inter-ply fabrics on the flexural properties of hybrid composite laminates was experimentally investigated. Four types of basalt/carbon/epoxy inter-ply hybrid composite laminates with varying angle ply orientation of reinforced basalt fiber and fixed orientation of carbon fiber were fabricated using hand lay-up technique. Three point bending test was performed according to ASTM 7264. The fracture surface analysis was carried out by scanning electron microscope (SEM). The results obtained from the four laminates were compared. Lay-up pattern of $[0B/+30B/-30B/0C]_S$ exhibits the best properties in terms of flexural strength and flexural modulus. Scanning electron microscopy results on the fracture surface showed that the interfacial de-bonding between the fibers and epoxy resin is a dominant fracture mode for all fiber lay-up schemes.

Properties of self-compacted concrete incorporating basalt fibers: Experimental study and Gene Expression Programming (GEP) analysis

  • Majeed, Samadar S.;Haido, James H.;Atrushi, Dawood Sulaiman;Al-Kamaki, Yaman;Dinkha, Youkhanna Zayia;Saadullah, Shireen T.;Tayeh, Bassam A.
    • Computers and Concrete
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    • v.28 no.5
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    • pp.451-463
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    • 2021
  • Inorganic basalt fiber (BF) is a novel sort of commercial concrete fiber which is made with basalt rocks. Previous studies have not sufficiently handled the behavior of self-compacted concrete, at elevated temperature, containing basalt fiber. Present endeavor covers experimental work to examine the characteristics of this material at high temperature considering different fiber content and applied temperature. Different tests were carried out to measure the mechanical properties such as compressive strength (fc), modulus of elasticity (E), Poisson's ratio, splitting tensile strength (fsplit), flexural strength (fflex), and slant shear strength (fslant) of HSC and hybrid concrete. Gene expression programming (GEP) was employed to propose new constitutive relationships depending on experimental data. It was noticed from the testing records that there is no remarkable effect of BF on the Poisson's ratio and modulus of elasticity of self-compacted concrete. The flexural strength of basalt fiber self-compacted concrete was not sensitive to temperature in comparison to other mechanical properties of concrete. Fiber volume fraction of 0.25% was found to be the optimum to some extend according to degradation of strength. The proposed GEP models were in good matching with the experimental results.

Effect of basalt fibers on fracture energy and mechanical properties of HSC

  • Arslan, Mehmet E.
    • Computers and Concrete
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    • v.17 no.4
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    • pp.553-566
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    • 2016
  • Fracture energy is one of the key parameters reveal cracking resistance and fracture toughness of concrete. The main purpose of this study is to determine fracture behavior, mechanical properties and microstructural analysis of high strength basalt fiber reinforced concrete (HSFRC). For this purpose, three-point bending tests were performed on notched beams produced using HSFRCs with 12 mm and 24mm fiber length and 1, 2 and $3kg/m^3$ fiber content in order to determine the value of fracture energy. Fracture energies of the notched beam specimens were calculated by analyzing load versus crack mouth opining displacement curves by the help of RILEM proposal. The results show that the effects of basalt fiber content and fiber length on fracture energy are very significant. The splitting tensile and flexural strength of HSFRC increased with increasing fiber content whereas a slight drop in flexural strength was observed for the mixture with 24mm fiber length and $3kg/m^3$ fiber content. On the other hand, there was no significant effect of fiber addition on the compressive strength and modulus of elasticity of the mixtures. In addition, microstructural analysis of the three components; cement paste, aggregate and basalt fiber were performed based on the Scanning Electron Microscopy and Energy-Dispersive X-ray Spectroscopy examinations.

Electromagnetic Interference Shielding Effect of Fiber Reinforced Composites with Stainless Fiber Conductive Filler (스테인레스 섬유를 충전제로 사용한 섬유강화 복합재료의 전자파 차폐 효과)

  • Han, Gil-Young;Song, Dong-Han;Ahn, Dong-Gyu
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.7
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    • pp.71-78
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    • 2010
  • The objective of this research is to investigate the influence of material characteristic and design on to the electromagnetic interference (EMI) shielding characteristics. Basalt glass fiber reinforced composite specimens with stainless fiber conductive filler were manufactured to perform the electromagnetic interference shielding effectiveness(SE) experiments. In order to reflection and absorb the specimen in electromagnetic fields, flanged coaxial transmission line sample holder was fabricated according to ASTM D 4935-89. Electromagnetic shielding effectiveness(EMSE) was measured quantitatively to examine the electromagnetic shielding characteristics of designed specimens. The result of EMI shielding experiments showed that maximum EMSE value of sandwich type specimens with GSG(basalt glass fiber/stainless fiber/basalt glass fiber) and SGS(stainless fiber/basalt glass fiber/stainless fiber) were 65dB and 80dB at a frequency of 1,500MHz, respectively.

Physical Properties of Basalt Chopped Fiber Reinforced Cement Composite (현무암 단섬유로 강화시킨 시멘트 복합재료의 물성)

  • Chun, Sang-Hee;Kim, Ho-Dong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.6
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    • pp.1298-1303
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    • 2009
  • The effect of blending weight and fiber length on the tensile and flexural strength for Basalt fiber reinforce cement composites is discussed. The increase of physical properties is mainly affected by blending quantity of fibers instead of the fiber length. Also it is believed that the interfacial adhesion between Basalt fiber and cement matrix gives positive influence to the physical strength. Basalt fiber in saturated $Ca(OH)_2$ solution, which is similar to the alkaline hydration environment of cement, shows very low weight loss even after 3 weeks of immersion.

Flexural behavior of RC beams made with basalt and polypropylene fibers: Experimental and numerical study

  • Murad, Yasmin Z.;Abdel-Jabar, Haneen
    • Computers and Concrete
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    • v.30 no.3
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    • pp.165-173
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    • 2022
  • The effect of basalt and polypropylene fibers on the flexural behavior of reinforced concrete (RC) beams is investigated in this paper. The compressive and tensile behaviors of the basalt concrete and polypropylene concrete cylinders are also investigated. Eight beams and 28 cylinders were made with different percentages of basalt and polypropylene fibers. The dosages of fiber were selected as 0.6%, 1.3%, and 2.5% of the total cement weight. Each type of fiber was mixed solely with the concrete mix. Basalt and polypropylene fibers are modern and cheap materials that can be used to improve the structural behavior of RC members. This research is designed to find the optimum percentage of basalt and polypropylene fibers for enhancing the flexural behavior of RC beams. Test results showed that the addition of basalt and polypropylene fibers in any dosage (0.6%, 1.3%, and 2.5%) can increase the flexural strength and displacement ductility index of the beams where the maximum enhancement was measured with 1.3% fibers. The maximum increments in the flexural strength and the displacement ductility index were 30.39% and 260% for the basalt fiber case, while the maximum improvement for the polypropylene fibers case was 55.5% and 230% compared to the control specimen. Finite element (FE) models were then developed in ABAQUS to predict the numerical behaviour of the tested beams. The FE models were able to predict the experimental behaviour with reasonable accuracy. This research confirms the efficiency of basalt and polypropylene fibers in enhancing the flexural behavior of RC beams, and it also suggests the optimum dosage of fibers.