GB/T 16777-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 16777-2008 | English | 145 |
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Test methods for building waterproofing coatings
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| GB/T 16777-1997 | English | 599 |
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Test methods for building waterproof coatings
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GB/T 16777-2008: Test methods for building waterproofing coatings---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/GBT16777-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.30
Q 17
Replacing GB/T 16777-1997
Test methods for building waterproofing coatings
Issued on. JUNE 30, 2008
Implemented on. APRIL 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Standard test conditions... 5
4 Coating film preparation... 6
5 Solid content... 8
6 Heat resistance... 9
7 Bond strength... 10
8 Bond strength on wet substrate... 16
9 Tensile properties... 17
10 Tear strength... 21
11 Aging at elongation... 22
12 Heating stretch rate... 23
13 Low temperature flexibility... 25
14 Low temperature bendability... 27
15 Impermeability... 29
16 Drying time... 30
Foreword
The degree of consistency between this Standard and JIS A6021-2000 "Liquid-applied
Compounds for Waterproofing Membrane Coating Of Buildings" is non-equivalent.
This Standard replaces GB/T 16777-1997 "Test methods for building waterproof
coatings".
The main differences between this Standard and GB/T 16777-1997 are as follows. In
this Standard.
- Film preparation is added. The film-forming method for water-emulsion film is
adjusted. The items of bond strength and tear strength on wet substrate are added
(Chapters 4, 8 and 10 of this Edition);
- The test methods of solid content and drying time have been adjusted (Chapters 4
and 12 of Edition 1997, Chapters 5 and 16 of this Edition);
- Method A for bond strength is added (Chapter 6 of Edition 1997, Chapter 7 of this
Edition);
- The extension test items are deleted (Chapter 7 of Edition 1997);
- Ultraviolet treatment is deleted from the tensile test (Chapter 8 of Edition 1997,
Chapter 9 of this Edition);
- Low-temperature flexibility is divided into low-temperature flexibility and low-
temperature bendability (Chapter 10 of Edition 1997, Chapters 13 and 14 of this
Edition).
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee on
Lightweight and Decorative Building Materials of Standardization Administration of
China (SAC/TC 195).
Main drafting organizations of this Standard. Suzhou Waterproof Material Research
and Design Institute of China Chemical Building Materials Corporation.
The drafting organizations of this Standard. Shanghai Academy of Building Research
(Group) Co., Ltd., Beijing Academy of Building Materials Science, Beijing Oriental
Yuhong Waterproof Technology Co., Ltd., Sichuan Hongyuan Waterproof Engineering
Co., Ltd., Dalian Xiyang Waterproof Engineering Group Co., Ltd., Shanghai Hui Lai
Paint Co., Ltd.
This Standard entrusts Suzhou Waterproof Material Research and Design Institute of
China Chemical Building Materials Corporation to be responsible for interpretation.
Main drafters of this Standard. Zhu Zhiyuan, Tan Chunli, Jiang Qinyi, Chen Wenjie,
Zhu Xiaohua, Xu Yuan, Hu Weiru, Fan Xiyang, Wang Lan, Zhou Rong.
This Standard entrusts Suzhou Waterproof Material Research and Design Institute of
China Chemical Building Materials Corporation to be responsible for interpretation.
This Standard was first issued in 1997.
Test methods for building waterproofing coatings
1 Scope
This document specifies the standard test conditions, coating film preparation, solid
content, heat resistance, bond strength, bond strength of wet substrate, tensile properties,
tear strength, aging at constant elongation, heating expansion rate of architectural
waterproof coatings, low temperature flexibility, impermeability, drying time and other
performance test methods.
This Standard applies to building waterproof coatings.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 328.10-2007, Test methods for building sheets for waterproofing - Part 10.
Bitumen, plastic and rubber sheets for waterproofing - Water tightness
GB/T 528, Rubber, vulcanized or thermoplastic - Determination of tensile stress-
strain properties (GB/T 528-1998, ISO 37.1994 eqv)
3 Standard test conditions
Laboratory standard test conditions. temperature is (23±2)℃; relative humidity is
(50±10)%.
4 Coating film preparation
4.1 Test equipment
4.2 Test steps
4.2.1 Before the test, the mold frame, tools and coating shall be placed under the
standard test conditions for more than 24h.
4.2.2 Weigh the required amount of test sample. Ensure the final film thickness as (1.5
± 0.2)mm.
4.2.3 Check the appearance of the coating film. Cut the test piece according to the
provisions in Table 2 from the coating film with a smooth surface and no obvious
bubbles.
5 Solid content
5.1 Test apparatus
5.1.1 Balance. resolution is 0.001g.
5.2 Test steps
Stir the sample (no diluent added for solid content test) well. Take (6±1)g of the sample
and pour it into a dry and weighed Petri dish (m0) and flatten the bottom. Immediately
weigh (m1).
5.3 Result calculation
The solid content is calculated according to formula (1).
5.4 Test report
The test report shall contain the following information.
6 Heat resistance
6.1 Test apparatus
6.1.1 Electric blast oven. temperature control accuracy is ±2℃.
6.1.2 Aluminum plate. the thickness is not less than 2mm; the area is greater than
100mm×50mm; there is a small hole in the middle and upper part, which is convenient
for hanging.
6.2 Test steps
After stirring the sample evenly, apply the sample in 2~3 times according to the
requirements of the manufacturer (the interval between each time shall not exceed 24h)
on the cleaned aluminum plate. The coating area is 100mm×50mm.
6.3 Result evaluation
After the test, all test pieces shall not flow, slide, or drip. There are no dense bubbles on
the surface of the test piece.
6.4 Test report
The test report shall contain the following information.
7 Bond strength
7.1 Method A
7.1.1 Test apparatus
7.1.1.1 Tensile testing machine. the measured value is between (15-85)% of the range;
the indication accuracy is not less than 1%; the tensile speed is (5±1)mm/min.
7.1.1.5 High-strength adhesive. high-strength adhesive that hardly penetrates coating
films. Solvent-free epoxy resin is recommended.
7.1.2 Test steps
The mortar blocks, tools and coatings prepared before the test shall be placed under the
standard test conditions for more than 24h.
7.2 Method B
7.2.1 Test apparatus
7.2.1.1 Tensile testing machine. the measured value is between (15~85)% of the
measuring range; the indication accuracy is not less than 1%; the tensile speed is
(5±1)mm/min.
7.2.1.2 Electric blast oven. temperature control accuracy is ±2℃.
7.2.1.3 "8"-shaped metal mold. as shown in Figure 7; the middle is divided into two
halves by an insert.
7.2.2 Test steps
Before the test, the prepared mortar blocks, tools and coatings shall be placed under the
standard test conditions for more than 24h.
7.3 Result calculation
The bonding strength is calculated according to formula (2).
7.4 Test report
The test report shall contain the following information.
8 Bond strength on wet substrate
Prepare "8"-shaped mortar blocks according to 7.2.Take 5 pairs of cured cement mortar
blocks. Remove surface laitance with No. 2 sandpaper. Soak the mortar block in water
at (23±2)°C for 24h.
9 Tensile properties
9.1 Test apparatus
9.1.1 Tensile testing machine. the measured value is between (15~85)% of the
measuring range; the indication accuracy is not less than 1%; the elongation range is
greater than 500mm.
9.1.2 Electric blast drying oven. temperature control accuracy is ±2℃.
9.2 Test steps
9.2.1 Untreated tensile properties
According to the requirements of Table 2, cut out the coating film into the dumbbell
type I test piece that meets the requirements of GB/T 528.Draw parallel marking lines
at a distance of 25mm.
9.2.2 Heat treatment tensile properties
Cut the coating film according to the requirements in Table 2 into six (120×25)mm
rectangular test pieces. Place them flat on the insulating material. Put them horizontally
into an electric blast oven that has reached the specified temperature.
9.2.5 Tensile properties after UV treatment
Place six (120×25mm rectangular test pieces) cut according to Table 2 flat on the glazed
tile. To prevent sticking, talcum powder can be sprinkled on the surface of the glazed
tile. Put the test piece into the UV box. The temperature of the space about 50mm away
from the surface of the test piece is (45±2)℃. Conduct constant temperature irradiation
for 240h. Take out and place under standard test conditions for 4h. Cut out the dumbbell
type I test piece that meets the requirements of GB/T 528.Carry out the tensile test
according to 9.2.1.
9.3 Result calculation
9.3.1 Tensile strength
The tensile strength of the test piece is calculated according to formula (3).
9.3.2 Elongation at break
The elongation at break of the test piece is calculated according to formula (4).
9.4 Test report
The test report shall contain the following information.
10 Tear strength
10.1 Test apparatus
10.1.1 Tensile testing machine. the measured value is between (15~85)% of the
measuring range; the indication accuracy is not less than 1%; the elongation range is
greater than 500mm.
10.2 Test steps
Cut the coating film, according to the requirements in Table 2, into right-angle tear test
pieces without a cut that meet the requirements of GB/T 529-1999.Use a thickness
gauge to measure the thickness of three points in the right-angle tear area of the test
piece.
10.3 Result calculation
The tear strength of the test piece is calculated according to formula (6).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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