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  • AS 2498.8-1991

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    Methods of testing rigid cellular plastics Determination of water absorption (Reconfirmed 2020)

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  11-02-1991

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 2498.8-1991 METHODS OF TESTING RIGID CELLULAR PLASTICS - DETERMINATION OF WATER ABSORPTION
    1 - PREFACE
    1 - FOREWORD
    1 - METHOD
    1 - 1 SCOPE
    1 - 2 APPLICATION
    1 - 3 REFERENCED DOCUMENT
    1 - 4 PRINCIPLE
    2 - 5 APPARATUS
    2 - 5.1 Balance
    2 - 5.2 Underwater weighing jig
    2 - 5.3 Immersion tank
    2 - 5.4 Test specimen rack
    2 - 5.5 Balance platform
    2 - 5.6 Forced-air circulating oven
    2 - 5.7 Dessicator
    2 - 5.8 Low-permeability plastic film
    2 - 5.9 Measuring instruments
    2 - 6 TEST SPECIMENS
    2 - 6.1 Dimensions
    2 - 6.2 Preparation
    2 - 6.3 Number
    2 - 6.4 Conditioning
    2 - 7 PROCEDURE
    3 - 8 CORRECTION FOR SWELLING AND CUT SURFACE CELLS
    3 - 8.1 Procedure A (uniform swelling)
    3 - 8.2 Procedure B (non-uniform swelling)
    4 - 9 CALCULATION OF RESULTS
    4 - 9.1 Original volume
    4 - 9.2 Surface area
    4 - 9.3 Percentage water absorbed
    5 - 10 REPORT
    6 - APPENDIX A - DETERMINATION OF AVERAGE CELL DIAMETER
    6 - A1 SCOPE
    6 - A2 PRINCIPLE
    6 - A3 APPARATUS
    6 - A3.1 Slicer
    6 - A3.2 Slide assembly
    6 - A3.3 Projector
    6 - A4 SPECIMENS
    6 - A4.1 Number of specimens
    6 - A4.2 Dimensions
    6 - A5 PROCEDURE
    6 - A6 CALCULATIONS
    6 - A7 DERIVATION OF RELATIONSHIP BETWEEN CELL DIAMETER AND CELL CHORD LENGTH

    Abstract - (Show below) - (Hide below)

    Specifies a method for determining the water absorption of rigid cellular plastics by measuring the change in buoyant force resulting from immersion in distilled water.

    Scope - (Show below) - (Hide below)

    This Method sets out a method for determining the water absorption of rigid cellular plastics by measuring the change in buoyant force resulting from immersion in distilled water.NOTES:1 Some materials may absorb significant additional amounts of water when immersed for longer than 96 h, or under a greater hydrostatic head.2 If a full assessment of the water absorption characteristics of a rigid cellular plastics is required, it is essential to make measurements over a range of immersion periods and plot a graph of water absorption against time.

    General Product Information - (Show below) - (Hide below)

    Committee PL/16
    Document Type Standard
    Product Note Reconfirmed 14/08/2020.
    This standard has been reconfirmed in Australia in 2020 and remains current in New Zealand. Reconfirmation Notice 14/08/2020
    Publisher Standards Australia
    Status Current
    Supersedes

    History - (Show below) - (Hide below)

    First published as AS 2498.8-1991.
    Reconfirmed 2020. First published AS 2498.8-1991.

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS 2498.2-1993 Methods of testing rigid cellular plastics Determination of linear dimensions (Reconfirmed 2020)

    Standards Referencing This Book - (Show below) - (Hide below)

    AS 1366.1-1992 Rigid cellular plastics sheets for thermal insulation Rigid cellular polyurethane (RC/PUR) (Reconfirmed 2018)
    AS 1366.4-1989 Rigid cellular plastics sheets for thermal insulation Rigid cellular polystyrene - Extruded (RC/PS-E) (Reconfirmed 2018)
    AS 1366.2-1992 Rigid cellular plastics sheets for thermal insulation Rigid cellular polyisocyanurate (RC/PIR) (Reconfirmed 2018)
    AS 1366.3-1992 Rigid cellular plastics sheets for thermal insulation Rigid cellular polystyrene - Moulded (RC/PS - M) (Reconfirmed 2018)
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