• 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.

Axial compression performance of basalt-fiber-reinforced recycled-concrete-filled square steel tubular stub column

  • Zhang, Xianggang;Gao, Xiang;Wang, Xingguo;Meng, Ercong;Wang, Fang
    • Advances in concrete construction
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    • v.10 no.6
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    • pp.559-571
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    • 2020
  • This study aimed to inspect the axial compression mechanical performance of basalt-fiber-reinforced recycled - concrete (BFRRC)-filled square steel tubular stub column. The replacement ratio of recycled coarse aggregate (RCA) and the basalt fiber (BF) dosage were used as variation parameters, and the axial compression performance tests of 15 BFRRC-filled square steel tubular stub column specimens were conducted. The failure mode and the load-displacement/strain curve of the specimen were measured. The working process of the BFRRC-filled square steel tubular stub column was divided into three stages, namely, elastic-elastoplasticity, sudden drawdown, and plasticity. The influence of the design parameters on the peak bearing capacity, energy dissipation performance, and other axial compression performance indexes was discussed. A mathematical model of segmental stiffness degradation was proposed on the basis of the degradation law of combined secant-stiffness under axial compression. The full-process curve equation of axial compressive stress-strain was proposed by introducing the influencing factors, including the RCA replacement ratio and the BF dosage, and the calculated curve agreed well with the test-measured curve.

A Study on the Physical Properties of Mineral Hydrate Insulation Material Mixed with Basalt Fiber

  • Park, Jae-Wan;Chu, Yong-Sik;Seo, Sung-Kwan;Jeong, Jae-Hyen
    • Journal of the Korean Ceramic Society
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    • v.53 no.1
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    • pp.63-67
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    • 2016
  • Mineral hydrate is a new insulation material that compensates for the defects of existing materials. Mineral hydrate is made of inorganic ingredients; therefore, it is nonflammable. The porous structure of mineral hydrate makes the material lightweight and insulating. Mineral hydrate insulation and similar products have been studied and manufactured in Korea and abroad. However, these insulation materials need to improve in terms of strength. In this study, basalt fiber was used to enhance the strength. In order to observe the property changes, compressive strength, heat conductivity, and specific gravity were measured and XRD pattern analysis was performed. These tests confirmed that basalt fiber was effective at improving the strength and lowering the heat conductivity of mineral hydrate insulation.

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.

The Experimental Study on the Fluidity Properties of Mortar Using Basalt Fiber and High Volume Fly Ash (바잘트 섬유 및 하이볼륨 플라이애시를 사용한 모르타르의 유동특성에 관한 실험적 연구)

  • Choi, Yun-Wang;Oh, Sung-Rok;Park, Man-Seok;Choi, Byung-Keol
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.2 no.4
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    • pp.345-353
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    • 2014
  • This study was evaluated influence of fluidity properties according to basalt fiber and high volume fly ash in the mortar level, as part of a basic study for development of fiber reinforced concrete using basalt fiber and high volume fly ash. In the first step, it was evaluated that fluidity properties of mortar according to replacement ratio 6 level of fly ash(10, 20, 30, 40, 50 and 60mass%) and fluidity properties of mortar according to content 5 levels of SP(1.3, 1.5, 1.7, 1.9 and 2.1%) and content 5 levels of VA(0.2, 0.4, 0.6, 0.8 and 1.0%) for dispersion of the basalt fiber, in the second step, it was evaluated that fluidity properties of mortar using High-volume fly ash (50mass%) on 3 levels of basalt fiber length (6, 20 and 30mm). Results of assessment, if after a fiber mixed, it showed that viscosity agent is more effective to improve the fluidity and fiber dispersion than superplasticizer, high volume fly ash (50%) applying the mixing, due to three properties of fly ash, showed that the improved fiber dispersibility and flow improvement.

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.

Characteristics of Natural Hydraulic Lime Mortar Mixed with Basalt Fiber (바잘트 섬유를 혼합한 천연수경성석회 모르타르의 특성)

  • Moon, Ki-Yeon;Cho, Jin-Sang;Cho, Kye-Hong;Hong, Chang-Woo
    • Resources Recycling
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    • v.24 no.6
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    • pp.61-68
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    • 2015
  • In this study, the strength properties of NHL based mortar with blending basalt fiber were investigated. In the first step, it was evaluated that physical properties of NHL based mortar according to mixing method of four types of basalt fiber and then mixing method of one type was selected. As a result of assessment, it showed that the physical properties with mixing method of dry blending were better than that of wet blending and mixing method that basalt fiber pre-mixed with NHL for 5 min in a blender was selected and water and aggregate were finally added. Secondly, the investigation of blending fiber length on the compressive and flexural strength for basalt fiber reinforced NHL based mortars was carried out. The compressive strength was decreased with adding fiber, and the flexural strength was increased more than plain mortar. In the case of adding 6 mm fiber, the compressive and flexural strength were improved more than that of others.

Enhancing the performance of hyposludge concrete beams using basalt fiber and latex under cyclic loading

  • Srividhya, S.;Vidjeapriya, R.;Neelamegam, M.
    • Computers and Concrete
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    • v.28 no.1
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    • pp.93-105
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    • 2021
  • An attempt has been made to study the influence of basalt fiber and latex on the behaviour of hypo sludge based concrete beams under cyclic loading. Two sets of four geometrically similar specimens were cast to study the deflection behaviour of beams. The analysis and study of parameters such as ultimate load carrying capacity, crack pattern, energy dissipation, stiffness degradation and ductility were conducted in this investigation. A preliminary investigation showed that the durability properties decreased when hypo sludge was added to concrete. To enhance the durability, SBR latex was added to one set of four specimens. Results indicate that the addition of basalt fibers and latex to the hypo sludge based concrete beams showed significant improvement in ultimate load carrying capacity, stiffness, energy dissipation and ductility compared to the control concrete beams. The specimen (LHSBFC) with 10% hypo sludge, 0.25% Basalt fiber and 10% SBR latex showed an increase of 1.82% load carrying capacity, 2.65% stiffness, 21.84% ductility, 16% energy dissipation when compared to the control concrete beam.

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.