• Title/Summary/Keyword: Lathe scrap

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Influence of Measurements of Lathe Scrap on the Characteristics of Fiber Reinforced Cementitious Composites (섬유보강 시멘트 복합체의 특성에 미치는 선반 스크랩 규격의 영향)

  • Kwon, Soon-Oh;Bae, Su-Ho;Lee, Hyun-Jin;Kim, Sung-Wook;Park, Jung-Jun
    • Journal of the Korean Society for Advanced Composite Structures
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    • v.6 no.2
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    • pp.70-76
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    • 2015
  • It should be noted that the use of the lathe scrap for making fiber reinforced cementitious composites(FRCCs) raised friendly environmental effect as well as economy because the lathe scrap is a by-product of steel manufactures and is occurred when lathe and milling works of them are conducted to process steel manufactures. Thus, the purpose of this research is to investigate the effect of measurements of lathe scrap on the characteristics of FRCCs. For this purpose, various lathe scraps were collected from processing plants of metal, and then these were processed 10mm, 20mm, and 40mm in lengths for 2mm and 4mm in widths, respectively. FRCCs containing lathe scraps were made according to their widths and lengths, and then characteristics such as the workability, compressive strength, and flexural strength of those were evaluated. As a result, it was observed from the test results that the optimum measurements of the lathe scrap for manufacturing FRCCs was 2mm in width and 40mm in length.

Workability and Strength Characteristics of Lathe Scrap Reinforced Cementitious Composites (선반 스크랩 보강 시멘트 복합체의 작업성 및 강도 특성)

  • Lee, Hyun-Jin;Bae, Su-Ho;Kwon, Soon-Oh;Kim, Sung-Wook;Park, Jung-Jun
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.20 no.6
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    • pp.40-45
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    • 2016
  • It should be noted that the use of the lathe scrap for making fiber reinforced cementitious composites raised friendly environmental effect as well as economy because the lathe scrap is a by-product of steel manefactures and is occurred when lathe and milling works of them are conducted to process steel manufactures. Thus, the purpose of this experimental research is to investigate workability and strength characteristics of lathe scrap reinforced cementitious composites(LSRCCs). For this purpose, three types of lathe scraps were collected from processing plants of metal, and then LSRCCs containing these were made for 2mm width and 40mm length. As a result, it was observed from the test results that the workability of LSRCCs was slightly decreased than plain mortar and the flexural strength of LSRCCs were much larger than these of plain mortar and effect of types of lathe scrap on the characteristics of LSRCCs were somewhat large.

Characteristics Evaluation of Lathe Scrap for Manufacturing Fiber Reinforced Cementitious Composites (섬유보강 시멘트 복합체 제조를 위한 선반 스크랩의 특성 평가)

  • Bae, Suho;Jeon, Juntai;Kwon, Soonoh;Lee, Hyunjin;Kim, Sungwook
    • Journal of the Society of Disaster Information
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    • v.10 no.3
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    • pp.432-441
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    • 2014
  • The purpose of this research is to investigate characteristics of lathe scrap for manufacturing fiber reinforced cementitious composites(FRCCs) to use lathe scrap as a alternative materials of steel fiber. It should be noted that the use of the lathe scrap for making FRCCs raised friendly environmental effect as well as economy because the lathe scrap was a by-product of steel manufactures. For this purpose, various steel scraps were collected from processing plants of metal and then their physical properties were evaluated. Also, steel scraps were classified and analyzed according to the KS D 2101 and then of these scraps, lathe scrap as a alternative materials of steel fiber was suggested. In addition, FRCCs containing lathe scraps were made according to their total volume fractions of 0.0, 0.5, 1.0, 1.5, and 2.0% for water-binder ratios of 30%, 40%, respectively, and then characteristics, such as the workability, compressive strength, and flexural strength of those were evaluated. It was observed from the test result that the compressive strengths at 7 and 28 days of FRCCs containing lathe scrap were slightly small but the flexural strengths at 28 days of those increased by 10% compared with plain concrete.

Material Model for Tensile Behavior of Lathe Scrap Reinforced Mortar (선반 스크랩 보강 모르타르의 인장거동에 대한 재료모델)

  • Hyun-Jin, Lee;Su-Ho, Bae;Soon-Oh, Kwon
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.10 no.4
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    • pp.443-449
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    • 2022
  • When fiber reinforced concrete is manufactured, it is useful to utilize lathe scrap as an aiternative material of steel fiber, because it is not only economical as an by-product of steel manufactures, but also has a very similar composition to that of steel fiber. The purpose of this experimental research is to evaluate the compressive strength and tensile behavior and then propose a material model of lathe scrap reinforced mortar. For this purpose, the lathe scrap reinforced mortars were ma de a ccording to their tota l volume fra ction of 1.5 % for wa ter-binder ra tio of 30 % a nd 40 %, respectively, a nd then the mechanical properties such as compressive strength, direct tensile strength, and stress-strain curve of those were evaluated. Also, based on the experimental results of lathe scrap reinforced mortar the material model for tensile behavior was suggested. It was revealed that the experimental results and the proposed material model corresponded relatively well.

Use of waste steel fibers from CNC scraps in shear-deficient reinforced concrete beams

  • Ilker Kalkan;Yasin Onuralp Ozkilic;Ceyhun Aksoylu;Md Azree Othuman Mydin;Carlos Humberto Martins;Ibrahim Y. Hakeem;Ercan Isik;Musa Hakan Arslan
    • Steel and Composite Structures
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    • v.49 no.2
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    • pp.245-255
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    • 2023
  • The present paper summarizes the results of an experimental program on the influence of using waste lathe scraps in the concrete mixture on the shear behavior of RC beams with different amounts of shear reinforcement. Three different volumetric ratios (1, 2 and %3) for the scraps and three different stirrup spacings (160, 200 and 270 mm) were adopted in the tests. The shear span-to-depth ratios of the beams were 2.67 and the stirrup spacing exceeded the maximum spacing limit in the building codes to unfold the contribution of lathe scraps to the shear resistances of shear-deficient beams, subject to shear-dominated failure (shear-tension). The experiments depicted that the lathe scraps have a pronounced contribution to the shear strength and load-deflection behavior of RC beams with widely-spaced stirrups. Namely, with the addition of 1%, 2% and 3% waste lathe scraps, the load-bearing capacity escalated by 9.1%, 21.8% and 32.8%, respectively, compared to the reference beam. On the other hand, the contribution of the lathe scraps to the load capacity decreases with decreasing stirrup spacing, since the closely-spaced stirrups bear the shear stresses and render the contribution of the scraps to shear resistance insignificant. The load capacity, deformation ductility index (DDI) and modulus of toughness (MOT) values of the beams were shown to increase with the volumetric fraction of scraps if the stirrups are spaced at about two times the beam depth. For the specimens with a stirrup spacing of about the beam depth, the scraps were found to have no considerable contribution to the load capacity and the deformation capacity beyond the ultimate load. In other words, for lathe scrap contents of 1-3%, the DDI values increased by 5-23% and the MOT values by 63.5-165% with respect to the reference beam with a stirrup spacing of 270 mm. The influence of the lathe scraps to the DDI and MOT values were rather limited and even sometimes negative for the stirrup spacing values of 160 and 200 mm.