• Title, Summary, Keyword: permeablility

Search Result 3, Processing Time 0.041 seconds

fundamental Properties of Water-Permeable Polymer-Modified Concrete (투수성 폴리머 시멘트 콘크리트의 기공적 성질)

  • 이윤수;주명기
    • Journal of the Korea Concrete Institute
    • /
    • v.14 no.3
    • /
    • pp.402-408
    • /
    • 2002
  • The permeable polymer-modified concrete has a lot of internal voids, which has more excellent performance in permeability and durability than asphalt and cement concrete. Therefore, the purpose of this study is to ascertain the strength properties of water-permeable polymer concretes with SBR latex and redispersible polymer powder. The water-permeable polymer concretes using SBR latex and redispersible polymer powder with water-binder ratio of 29 %, polymer-cement ratios of 0, 5, 10, 15 and 20 % are prepared, and tested for compressive strength, splitting tensile strength, flexural strength, water permeablility. From the test results, improvements in the strength properties of the water-permeable polymer concretes due to the addition of the SBR latex and redispersible polymer powder are discussed.

EEM Analysis of Open-Typed Cylindrical Shieldcase (양끝이 열린 실드케이스의 FEM해석)

  • Kim, Young-Hak
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • /
    • pp.767-769
    • /
    • 2017
  • Four-shell open-typed shield case was analyzed using 3D FEM. Analysis Dimension was $2m{\times}2m{\times}2m$. Length of shield case was 0.6m and its diameter was 0.1m, 0.08., 0.06m and 0.04m. Thickness and permeablility of shield case was all 1mm and 50,000. The excited magneic fields were earth magneic fields, which were 24A/m in the holizontal direction and 36A/m in the vertical direction, respectively. During FEM analysis, shield case was located at the direction of holizontal magnetic field and was rotated $90^{\circ}$. Magnetic field was $4.45{\times}10^{-2}A/m$ at the direction of holizontal magnetic field and $6.66{\times}10^{-4}A/m$ at the $90^{\circ}$ rotated direction.

  • PDF

High Performance Barrier Technologies for Tire Innerliner (타이어 인너라이너용 고차단화 기술)

  • Kang, Yong-Gu;Lee, Seong-Peal;Han, Min-Hyun
    • Elastomers and Composites
    • /
    • v.46 no.2
    • /
    • pp.102-111
    • /
    • 2011
  • The innerliner for a tire has excellent impermeability, air retention and good flex properties. The innerliner offers a role to improve performance parameter, such as air retention and tire durability that is of praricular importance for commercial tires. In order to improve the gas barrier properties of a innerliner, most of the innerliner rubbers, such as a halogenated butyl rubber(HIIR), brominated poly(isobutylene-co-isoprene)(BIIR), brominated polyisobutylene-co-paramethylstyrene(BIMS) are used as nanocomposites with nano fillers such as silicates, graphite etc. Innerliners based on nanocomposites may allow gauge adjustments and permeability reductions with potential improvement in tire durability. This article discusses potential innerliner permeablity reduction and compounding parameters on the properties of nanocomposite based innerliners.