GB/T 30805-2024 (GB/T 30805-2014) PDF English
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Thermal insulating products for building applications - Determination of short-term water absorption by partial immersion
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GB/T 30805-2014: Thermal insulating products for building applications -- Determination of short term water absorption by partial immersion
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT30805-2014
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.10
Q 25
GB/T 30805-2014 / ISO 29767.2008
Thermal insulating products for building applications -
Determination of short term water absorption by
partial immersion
(ISO 29767.2008, IDT)
Issued on: JUNE 24, 2014
Implemented on: FEBRUARY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Principle... 4
4 Apparatus... 4
5 Test specimens... 6
6 Procedure... 6
7 Calculation and expression of results... 8
8 Accuracy of measurement... 8
9 Test report... 9
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard, using translation method, identically adopts ISO 29767.2008
Thermal insulating products for building applications - Determination of short
term water absorption by partial immersion.
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Insulation Material of Standardization Administration of China (SAC/TC 191).
The drafting organizations of this Standard. Nanjing Glass Fiber Research &
Design Institute Co., Ltd., National Glass Fiber Products Quality Supervision
and Inspection Center.
Main drafters of this Standard. Cui Jun, Chen Lihua, Jiang Pengfei, Yang Chao.
Thermal insulating products for building applications -
Determination of short term water absorption by
partial immersion
1 Scope
This Standard specifies the equipment and procedures for determining the
short-term water absorption of specimens by partial immersion. This Standard
is applicable to thermal insulating products.
NOTE The procedure specified by this Standard is intended to simulate the water absorption
caused by a 24 h raining period during construction work.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
ISO 29768 Thermal insulating products for building applications -
Determination of linear dimensions of test specimens
ISO 5725-2 Accuracy (trueness and precision) of measurement methods
and results - Part 2.Basic method for the determination of repeatability and
reproducibility of a standard measurement method
3 Principle
A specimen is placed with its lower part in water for a period of 24 h and the
change in its mass is measured.
The excess water adhering to the surface but not absorbed by the specimen is
removed by drainage (method A) or taken into account by deduction of the initial
water uptake (method B).
4 Apparatus
4.1 Balance, capable of determining the mass of a specimen to an accuracy
6) date of testing,
7) general information relating to the test including a reference to the
method used (A or B) and, if relevant, the initial water uptake,
8) any events that can have affected the results;
d) results. all individual values and the mean value.
NOTE It is expected that information about the apparatus and identity of the person
responsible for the test be available in the laboratory, but it is not necessary that it be recorded
in the report.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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