• Title/Summary/Keyword: Prepackage

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On OIML Mixed Acceptance Sampling Plans and Optimal Target Value for Products in Prepackages (OIML 혼합 샘플링 검사계획에 대한 고찰과 최적 목표값의 설정 : 실량표시상품을 대상으로)

  • Seo, Sun-Keun
    • Journal of Korean Institute of Industrial Engineers
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    • v.41 no.1
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    • pp.17-24
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    • 2015
  • Mixed acceptance sampling plans for quantity of products in prepackages are widely used for compliance testing. To pass testing, random samples jointly comply with two legal requirements: (i) the average net content of an inspection lot shall be not less than the labelled quantity and (ii) the numbers of under-filled prepackages in a sample are less than or equal to permitted numbers. This paper discusses some drawbacks of the acceptance sampling plans and requirements recommended in OIML R87 (KS A 50087 translated by Korean) developed by the International Organization of Legal Metrology and evaluates the producer's and consumer's risks. In addition, problem of determining a target value in filling processes of prepackages under the OIML R87 requirements is addressed and illustrated with a numerical example.

Properties of Polymer-Modified Surface Preparation Mortars with Mineral Admixtures for Sewage Treatment Structures (하수처리구조물용 광물질 혼화재 병용 폴리머 혼입 바탕조정재의 특성)

  • Park, Seung-Min;Kim, Wan-Ki
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.11a
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    • pp.30-31
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    • 2017
  • The objective of this study is to evaluate the performance of polymer-modified surface preparation mortars with pozzolanic materials for corrosion prevention method in deteriorated sewage treatment structures. The prepackaged-type surface preparation mortars are prepared with a polymer-binder ratio of 10%, ground granulated blast furnace slag contents of 0, 15, 30%, a fly ash content of 15%. And, the specimens are tested for workability, adhesion in tension, water absorption, crack and impact resistance. As a result, the prepackage-type surface preparation mortars for sewage treatment structure are satisfied with quality requirements by KS F 4716, Japan sewage work agency(JS) and JIS A 6916 for surface preparation mortars.

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