• Title/Summary/Keyword: basalt fibers

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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.

Static and dynamic characteristics of silty sand treated with nano-silica and basalt fiber subjected to freeze-thaw cycles

  • Hamid Alizadeh Kakroudi;Meysam Bayat;Bahram Nadi
    • Geomechanics and Engineering
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    • v.37 no.1
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    • pp.85-95
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    • 2024
  • This study investigates the influence of nano-silica and basalt fiber content, curing duration, and freeze-thaw cycles on the static and dynamic properties of soil specimens. A comprehensive series of tests, including Unconfined Compressive Strength (UCS), static triaxial, and dynamic triaxial tests, were conducted. Additionally, scanning electron microscopy (SEM) analysis was employed to examine the microstructure of treated specimens. Results indicate that a combination of 1% fiber and 10% nano-silica yields optimal soil enhancement. The failure patterns of specimens varied significantly depending on the type of additive. Static triaxial tests revealed a notable reduction in the brittleness index (IB) with the inclusion of basalt fibers. Specimens containing 10% nano-silica and 1% fiber exhibited superior shear strength parameters and UCS. The highest cohesion and friction angle were obtained for treated specimens with 10% nano-silica and 1% fiber, 90 kPa and 37.8°, respectively. Furthermore, an increase in curing time led to a significant increase in UCS values for specimens containing nano-silica. Additionally, the addition of fiber resulted in a decrease in IB, while the addition of nano-silica led to an increase in IB. Increasing nano-silica content in stabilized specimens enhanced shear modulus while decreasing the damping ratio. Freeze-thaw cycles were found to decrease the cohesion of treated specimens based on the results of static triaxial tests. Specimens treated with 10% nano-silica and 1% fiber experienced a reduction in shear modulus and an increase in the damping ratio under freeze-thaw conditions. SEM analysis reveals dense microstructure in nano-silica stabilized specimens, enhanced adhesion of soil particles and fibers, and increased roughness on fiber surfaces.

Research on basic mechanical properties and damage mechanism analysis of BFUFARC

  • Yu H. Yang;Sheng J. Jin;Chang C. Shi;Wen P. Ma;Jia K. Zhao
    • Advances in concrete construction
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    • v.16 no.6
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    • pp.277-290
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    • 2023
  • In order to study the mechanical properties of basalt fiber reinforced ultra-fine fly ash concrete (BFUFARC), the effects of ultra-fine fly ash (UFA) content, basalt fiber content, basalt fiber length and water reducing agent content on the compressive strength, splitting tensile strength and flexural strength of the composite material were studied through experimental and theoretical analysis. Also, a scanning electron microscope (SEM) was employed to analyze the mesoscopic structure in the fracture surface of composite material specimens at magnifications of 500 and 3500. Besides, the energy release rate (Gc) and surface free energy (γs) of crack tip cracking on BFUFARC in different basalt fiber content were studied from the perspective of fracture mechanics. Further, the cracking resistance, reinforcement, and toughening mechanisms of basalt fibers on concrete substrate were revealed by surface free energy of BFUFARC. The experimental results indicated that basalt fiber content is the main influence factor on the splitting tensile strength of BFUFARC. In case that fiber content increased from 0 to 0.3%, the concrete surface free energy at the tip of single-sided crack showed a trend of increased at first and then decreased. The surface free energy reached at maximum, about 3.59 × 10-5 MN/m. During the process of increasing fiber content from 0 to 0.1%, GC-2γS showed a gradually decreasing trend. As a result, an appropriate amount of basalt fiber can play a preventing cracking role by increasing the concrete surface free energy, further effectively improve the concrete splitting tensile performance.

Fabrication of Carbon/Basalt Hybrid Composites and Evaluation of Mechanical Properties (탄소/현무암 섬유강화 하이브리드 복합재료의 성형과 기계적 특성 평가)

  • Lee, Jin-Woo;Kim, Yun-Hae;Jung, Min-Kyo;Yoon, Sung-Won;Park, Jun-Mu
    • Composites Research
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    • v.27 no.1
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    • pp.14-18
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    • 2014
  • Carbon Fiber Reinforced Plastic (CFRP) has strong and superb material properties, especially in mechanical and heat-resisting aspects, but the drawback is its high price. In this study, we made a hybrid composite using carbon fiber and basalt fiber, which is expected to attribute to its strong material properties and its financial benefits. We found out that the higher the content of basalt fiber included, the lower the intensity, and carbon's intensity contents of 80% showed the similar intensity level as that of CFRP. Besides it was possible to get a better mechanical properties using the composite that included the mixed fiber, instead of using a composition of separate fibers filed.

Ozonization of SWCNTs on thermal/mechanical properties of basalt fiber-reinforced composites

  • Kim, Seong Hwang;Heo, Young-Jung;Park, Soo-Jin
    • Steel and Composite Structures
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    • v.31 no.5
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    • pp.517-527
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    • 2019
  • To move forward in large steps rather than in small increments, the community would benefit from a systematic and comprehensive database of multi-scale composites and measured properties, driven by comprehensive studies with a full range of types of fiber-reinforced polymers. The multi-scale hierarchy is a promising chemical approach that provides superior performance in synergistically integrated microstructured fibers and nanostructured materials in composite applications. Achieving high-efficiency thermal conductivity and mechanical properties with a simple surface treatment on single-walled carbon nanotubes (SWCNTs) is important for multi-scale composites. The main purpose of the project is to introduce ozone-treated SWCNTs between an epoxy matrix and basalt fibers to improve mechanical properties and thermal conductivity by enhancing dispersion and interfacial adhesion. The obvious advantage of this approach is that it is much more effective than the conventional approach at improving the thermal conductivity and mechanical properties of materials under an equivalent load, and shows particularly significant improvement for high loads. Such an effort could accelerate the conversion of multi-scale composites into high performance materials and provide more rational guidance and fundamental understanding towards realizing the theoretical limits of thermal and mechanical properties.

Development of fiber reinforced self-compacting concrete (FRSCC): Towards an efficient utilization of quaternary composite binders and fibers

  • Fediuk, Roman;Mosaberpanah, Mohammad A.;Lesovik, Valery
    • Advances in concrete construction
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    • v.9 no.4
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    • pp.387-395
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    • 2020
  • This study has been carried out in two-phases to develop Fiber Reinforced Self-Compacting Concrete (FRSCC) performance. In the first phase, the composition of the quaternary composite binder compromised CEM I 42.5N (58-70%), Rice Husk Ash (25-37%), quartz sand (2.5-7.5%) and limestone crushing waste (2.5-7.5%) were optimized. And in the second phase, the effect of two fiber types (steel brass-plated and basalt) was investigated on the SCC optimized with the optimum CB as disperse reinforcement at 6 different ratios of 1, 1.2, 1.4, 1.6, 1.8, and 2.0% by weight of mix for each type. In this study, the theoretical principles of the synthesis of self-compacting dispersion-reinforced concrete have been developed which consists of optimizing structure-formation processes through the use of a mineral modifier, together with ground crushed cement in a vario-planetary mill to a specific surface area of 550 m2 / kg. The amorphous silica in the modifier composition intensifies the binding of calcium hydroxide formed during the hydration of C3S, helps reduce the basicity of the cement-composite, while reducing the growth of portlandite crystals. Limestone particles contribute to the formation of calcium hydrocarbonate and, together with fine ground quartz sand; act as microfiller, clogging the pores of the cement. Furthermore, the results revealed that the effect of fiber addition improves the mechanical properties of FRSCC. It was found that the steel fiber performed better than basalt fiber on tensile strength and modulus of elasticity; however, both fibers have the same performance on the first crack strength and sample destruction of FRSCC. It also illustrates that there will be an optimum percentage of fiber addition.

Evaluation of Thermal Performance and Mechanical Properties in the Cryogenic Environment of Basalt Fiber Reinforced Polyurethane Foam (현무암 섬유 보강 폴리우레탄폼의 열적 성능 및 극저온 환경에서의 기계적 특성 평가)

  • Jeon, Sung-Gyu;Kim, Jeong-Dae;Kim, Hee-Tae;Kim, Jeong-Hyeon;Kim, Seul-Kee;Lee, Jae-Myung
    • Journal of the Society of Naval Architects of Korea
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    • v.59 no.4
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    • pp.207-213
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    • 2022
  • LNG CCS which is a special type of cargo hold operated at -163℃ for transporting liquefied LNG is composed of a primary barrier, plywood, insulation panel, secondary barrier, and mastic. Currently, glass fiber is used to reinforce polyurethane foam. In this paper, we evaluated the possibility of replacing glass fiber-reinforced polyurethane foam with basalt fiber-reinforced polyurethane foam. We conducted a thermal conductivity test to confirm thermal performance at room temperature. To evaluate the mechanical properties between basalt and glass-fiber-reinforced polyurethane foam which is fiber content of 5 wt% and 10 wt%, tensile and an impact test was performed repeatedly. All of the tests were performed at room temperature and cryogenic temperature(-163℃) in consideration of the temperature gradient in the LNG CCS. As a result of the thermal conductivity test, the insulating performance of glass fiber reinforced polyurethane foam and basalt fiber reinforced polyurethane foam presented similar results. The tensile test results represent that the strength of basalt fiber-reinforced polyurethane foam is superior to glass fiber at room temperature, and there is a clear difference. However, the strength is similar to each other at cryogenic temperatures. In the impact test, the strength of PUR-B5 is the highest, but in common, the strength decreases as the weight ratio of the two fibers increases. In conclusion, basalt fiber-reinforced polyurethane foam has sufficient potential to replace glass fiber-reinforced polyurethane foam.

A Study on the Development of Contemporary Jewelry through Resin Infusion Method -Focusing on Basalt fiber- (레진 인퓨전 성형을 통한 현대장신구 개발에 관한 연구 -바살트 섬유를 중심으로-)

  • Kwon, In-Hye;Hwang, Sun-Wook
    • Journal of Digital Convergence
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    • v.20 no.4
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    • pp.597-606
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    • 2022
  • This study attempted to find a new manufacturing method through Basalt fiber and resin infusion method to expand the range of expressions of Contemporary jewelry produced in studios. To this end, the concept of fiber introduction and infusion method was examined through analysis of used cases, and based on this, flat plates and color samples were produced, and then the samples were made to estimate the possibility of direct use in jewelry. As a result, the infusion method process presented certain results that could be used as a production process in the studio, and Basalt fibers were able to express various colors of spray and porselin, especially fiber its painted with porselin, which have high strength and they can be expressed intentionally, it are very valuable as jewelry's material, it is expected to be an opportunity to expand the practical production methods and expressions of Contemporary jewelry.

Experimental Study on the Use of High-Volume Fly Ash and Basalt Fiber as Emergency Repair Materials for Slope Stabilization: An Analysis of Basic Quality Characteristics (비탈면 긴급 복구를 위한 하이볼륨 플라이애시 및 현무암 섬유 보강 보수재료의 기초 품질 특성에 대한 실험적 연구)

  • Doo-Won Lee;Il-Young Jang
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.12 no.2
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    • pp.111-120
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    • 2024
  • This paper presents a study aimed at developing repair materials for emergency slope stabilization after disasters such as floods. The research assessed how different mix ratios of fly ash and reinforcement with basalt fibers affect the basic quality properties of mortars. Optimal amounts of fly ash were selected based on these properties, and appropriate amounts of chemical admixtures and thickeners were determined to enhance the quality attributed to the basalt fiber mixture. Notably, high-volume fly ash reduced the need for high-performance water reducers and improved workability, known benefits that also helped mitigate fiber ball issues in conjunction with the effects of thickeners. The experimental results indicated that the developed repair materials could potentially be used for emergency repairs, with a focus on initial age strength. This research aims to provide foundational data for repair materials used in future emergency slope stabilizations.