GB/T 328.25-2007 PDF English
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Test methods for building sheets for waterproofing -- Part 25: Bitumen, plastic and rubber sheets for waterproofing-resistance to static loading
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GB/T 328.25-2007: PDF in English (GBT 328.25-2007) GB/T 328.25-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.30
Q 17
Test Methods for Building Sheets for
Waterproofing - Part 25: Bitumen Plastic and
Rubber Sheets for Waterproofing - Resistance to
Static Loading
ISSUED ON: MARCH 26, 2007
IMPLEMENTED ON: OCTOBER 01, 2007
Jointly Issued by: General Administration of Quality Supervision,
Inspection and Quarantine (GAQSIQ);
Standardization Administration of the People's
Republic of China (SAC).
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Definition ... 6
4 Principle ... 6
5 Apparatus ... 7
6 Sampling ... 9
7 Preparation of Test Specimens ... 9
8 Procedure ... 10
9 Expression of Results ... 10
10 Test Report ... 11
Foreword
GB/T 328 “Test Methods for Building Sheets for Waterproofing” is divided into the
following 27 parts:
— Part 1: Bitumen Plastic and Rubber Sheets for Waterproofing - Rules for
Sampling;
— Part 2: Bitumen Sheets for Waterproofing - Visible Defects;
— Part 3: Plastic and Rubber Sheets for Waterproofing - Visible Defects;
— Part 4: Bitumen Sheets for Waterproofing - Thickness and Mass per Unit Area;
— Part 5: Plastic and Rubber Sheets for Waterproofing - Thickness and Mass per
Unit Area;
— Part 6: Bitumen Sheets for Waterproofing - Length, Width and Straightness;
— Part 7: Plastic and Rubber Sheets for Waterproofing - Length, Width,
Straightness and Flatness;
— Part 8: Bitumen Sheets for Waterproofing - Tensile Properties;
— Part 9: Plastic and Rubber Sheets for Waterproofing - Tensile Properties;
— Part 10: Bitumen Plastic and Rubber Sheets for Waterproofing - Watertightness;
— Part 11: Bitumen Sheets for Waterproofing - Flow Resistance at Elevated
Temperature;
— Part 12: Bitumen Sheets for Waterproofing - Dimensional stability;
— Part 13: Plastic and Rubber Sheets for Waterproofing - Dimensional Stability;
— Part 14: Bitumen Sheets for Waterproofing - Flexibility at low temperature;
— Part 15: Plastic and Rubber Sheets for Waterproofing - Foldability at Low
Temperature;
— Part 16: Plastic and Rubber Sheets for Waterproofing - Exposure to Liquid
Chemicals Including Water;
— Part 17: Bitumen Sheets for Waterproofing - Adhesion of Granules;
— Part 18: Bitumen Sheets for Waterproofing - Resistance to Tearing (Nail Shank);
— Part 19: Plastic and Rubber Sheets for Waterproofing - Resistance to Tearing;
— Part 20: Bitumen Sheets for Waterproofing - Resistance to Peeling of Joints;
— Part 21: Plastic and Rubber Sheets for Waterproofing - Resistance to Peeling of
Joints;
— Part 22: Bitumen Sheets for Waterproofing - Resistance to Shearing of Joints;
— Part 23: Plastic and Rubber Sheets for Waterproofing - Resistance to shearing
of Joints;
— Part 24: Bitumen Plastic and Rubber Sheets for Waterproofing - Resistance to
Impact;
— Part 25: Bitumen Plastic and Rubber Sheets for Waterproofing - Resistance to
Static Loading;
— Part 26: Bitumen Sheets for Waterproofing - Dissoluble Composite of
Membrane (Impregnated and Coated Asphalt Amount);
— Part 27: Bitumen Plastic and Rubber Sheets for Waterproofing - Water
Absorption.
This Part is Part 25 of GB/T 328.
This Part is identical to EN 12730:2001 "Flexible Sheets for Waterproofing - Bitumen
Plastic and Rubber Sheets for Roof Waterproofing - Determination of Resistance to
Static Loading" (English edition).
Chapter and article numbers of this Part are consistent with those of EN 12730:2001.
In order to make it convenient for use, this Part makes the following editing
modifications:
a) "This European Standard" is changed into "this Part";
b) "EN 13416" is changed into "GB/T 328.1";
c) The foreword and normative references of EN 12730:2001 is deleted; the
foreword of this Part is re-compiled.
This Part was proposed by China Building Material Industry Association.
This Part shall be under the jurisdiction of National Technical Committee on
Constructional Materials and Decorative Materials of Standardization Administration
of China (SAC/TC 195).
Chief drafting organizations for this Part: China Chemical Building Material Company
Suzhou Waterproof Material Research and Design Institute, and Technical
Test Methods for Building Sheets for Waterproofing -
Part 25: Bitumen Plastic and Rubber Sheets for
Waterproofing - Resistance to Static Loading
1 Scope
This Part of GB/T 328 specifies a test for puncture by static loading for roofing
membranes. Mechanical stress on membranes varies from static long-term loads to
dynamic short-term loads. This method represents the static category of load where
the stress is applied over a period of time.
This Part may also be applicable to waterproofing.
2 Normative References
The following normative documents contain provisions which, through reference in
this text, constitute provisions of this Part of GB/T 328. For dated references, then
subsequent amendments revisions of these publications do not apply. However,
parties who enter into an agreement based on this Part are encouraged to investigate
the possibility of applying the most recent editions of the normative documents
indicated below. For undated references, the latest edition of the normative document
referred to applies.
GB/T 328.1 Test Methods for Building Sheets for Waterproofing - Part 1: Bitumen
Plastic and Rubber Sheets for Waterproofing - Rules for Sampling
3 Definition
For the purpose of this Part of GB/T 328, the following definition applies.
Top surface
The upper side of the sheet, as used in situ. It is usually the inside of the roll.
Note: “Surface” in EN 12730:2001 is changed into “Top surface” in this Part.
4 Principle
The test specimens are conditioned at least 24 h at the specified test conditions.
8 Procedure
8.1 General
Testing is carried out at a temperature of (23 ± 2) °C.
For every test at each loading interval a new test specimen shall be used; and a new
polystyrene panel shall be used for the soft support test (see 8.2).
The test specimen is laid on the horizontal support with the surface upwards.
The puncturing tool is positioned at the centre of the test specimen.
The testing is carried out with three parallel test specimens in intervals of loading
starting with 5 kg. The load is then increased by steps of 5 kg until perforation occurs,
or up to a maximum load of 20 kg. The duration of loading shall be 24 h for each
loading interval.
The load is applied carefully, without shock.
After each loading interval the test specimens are examined for a possible puncture
by coating the surface where the load has been applied with a soap solution between
(7 ± 2) min after the test. A pressure difference of 15 kPa is applied to the area where
the load has been applied by means of a vacuum or pressure device (Figure 2) with
the lower pressure at the surface of the sheet. If after 60 s no air bubbles are visible,
the test specimen is considered not punctured.
The material under testing is considered to resist the given load when three out of
three test specimens are not punctured.
8.2 Method A using soft support
When testing on soft support the test specimen is fixed in the nail studded clamping
frame.
The downward movement of the ball from the surface of the test specimen should be
limited to 40 mm as shown in Figure 1.
8.3 Method B using hard support
When testing on hard support the test specimen is loose laid on the concrete paving
slab.
9 Expression of Results
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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