GB/T 16777-2008 PDF in English
GB/T 16777-2008 (GB/T16777-2008, GBT 16777-2008, GBT16777-2008)
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Test methods for building waterproofing coatings
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| GB/T 16777-1997 | English | 599 |
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GB/T 16777-2008: PDF in English (GBT 16777-2008) GB/T 16777-2008
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
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)
GB/T 529-1999, Rubber, vulcanized or thermoplastic - Determination of tear
strength (Trouser, angle and crescent test pieces) (ISO 34-1:1994 eqv)
GB/T 18244, Test methods for weathering resistance of building waterproof
materials
3 Standard test conditions
Laboratory standard test conditions: temperature is (23±2)℃; relative humidity is
(50±10)%.
Strict conditions: temperature is (23±2)℃; relative humidity is (50±5)%.
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. The total thickness
is 1.5mm. Scrape the surface one last time. Carry out maintenance according to the
conditions in Table 1. Demolding is not required. Then hang the aluminum plate
vertically in an electric blast drying oven that has been adjusted to the specified
temperature. The distance between the test piece and the wall of the drying box is not
less than 50mm. The center of the test piece shall be at the same position as the probe
of the thermometer. After standing at the specified temperature for 5h, take it out.
Observe surface phenomena. Test 3 test pieces in total.
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:
a) Chapter numbers of this Standard;
b) Determination of all necessary details of the test product;
c) Information about preparation of test piece;
d) Test temperature and time;
e) Test results;
f) Differences in methods used or abnormalities encountered during the test;
g) Test date.
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.
7.1.1.2 Electric blast oven: temperature control accuracy is ±2℃.
7.1.1.3 Special metal clamps for stretching: upper clamps, lower clamps and backing
the prepared coating to the section of the mortar block. Conduct butt joint of the cross
sections of the two mortar blocks. Press them tightly. The thickness of the coating
between the mortar blocks shall not exceed 0.5mm. Place under standard test conditions
for 4h. Cure the prepared test pieces. The condition is at the temperature of (20±1)℃.
The relative humidity is not less than 90%. Cure for 168h. Prepare five test pieces.
Place the cured test pieces under standard test conditions for 2h. Install the test piece
on the testing machine. Keep the center line of the vertical direction of the test piece
surface and the center of the fixture of the testing machine on the same line. Stretch at
a speed of (5±1)mm/min until the test piece fails. Record the maximum tensile force of
the test piece. The test temperature is (23±2)°C.
Result calculation and test report are according to Chapter 7.
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℃.
9.1.3 Punching machine and dumbbell type I cutter that meets the requirements of GB/T
528.
9.1.4 Ultraviolet box: 500W straight tube mercury lamp. The lamp tube is parallel to
the bottom of the box. The distance from the surface of the test piece is (47~50)cm.
9.1.5 Thickness gauge: the contact surface diameter is 6mm; the pressure per unit area
is 0.02MPa; the division value is 0.01mm.
9.1.6 Xenon arc lamp aging test chamber: a xenon arc lamp aging test chamber that
meets the requirements of GB/T 18244.
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. Use a thickness gauge to measure the thickness of three points
in the middle and both ends of the marked line of the test piece. Take its arithmetic
mean value as the thickness of the test piece. Adjust the distance between the clamps of
the tensile testing machine to about 70mm. Clamp the test piece on the testing machine.
GB/T 528. Carry out the tensile test according to 9.2.1.
For water-based coatings, after soaking, take them out and wipe them dry. Then place
them in an electric blast oven at (60±2)°C for 6h±15min. Take out and place under
standard test conditions for (18±2)h. 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.
9.2.5 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.
9.2.6 Tensile properties of artificially weathered materials
Place six (120×25)mm rectangular specimens cut according to Table 2 in a xenon arc
lamp aging test chamber that meets the requirements of GB/T 18244. Take out after the
cumulative irradiation energy of the test is 1500 MJ2/m2 (about 720h). Wipe dry. Place
under standard test conditions for 4h. Cut out dumbbell type I test pieces that meet the
requirements of GB/T 528. Carry out the tensile test according to 9.2.1.
For water-based coating, take out and wipe dry. Then place in an electric blast oven at
(60±2)°C for 6h±15min. Take out and place under standard test conditions for (18±2)h.
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):
Where,
TL - The tensile strength, in megapascals (MPa);
P - The maximum pulling force, in Newtons (N);
B - The width of the middle part of the test piece, in millimeters (mm);
D - The thickness of the test piece, in millimeters (mm).
e) Tensile speed;
f) Test results;
g) Differences in methods used or abnormalities encountered during the test;
h) Test date.
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.
10.1.2 Electric blast drying oven: temperature control accuracy is ±2℃.
10.1.3 Punching machine and right-angle tearing cutter that meets the requirements in
5.1.2 of GB/T 529-1999.
10.1.4 Thickness gauge: the contact surface diameter is 6mm; the pressure per unit area
is 0.02MPa; the division value is 0.01mm.
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. Take the arithmetic mean value as the thickness of the test piece. Clamp the test
piece on the testing machine. Keep the centerline of the length direction of the test piece
on the same line as the center of the fixture of the testing machine. Stretch to break
according to the tensile speed in Table 4. Record the maximum load when the test piece
breaks (P). Test five test pieces.
10.3 Result calculation
The tear strength of the test piece is calculated according to formula (6):
Where,
Ts - The tear strength, in kilonewtons per meter (kN/m);
P - The maximum pulling force, in Newtons (N);
d - The thickness of the test piece, in millimeters (mm).
Take the arithmetic mean value of five test pieces as the test result. The result is accurate
to 0.1kN/m.
10.4 Test report
The test report shall contain the following information:
a) Chapter numbers of this Standard;
b) Determination of all necessary details of the test product;
c) Information about preparation of test piece;
d) Tensile speed;
e) Test results;
f) Differences in methods used or abnormalities encountered during the test;
g) Test date.
11 Aging at elongation
11.1 Test apparatus
11.1.1 Electric blast drying oven: temperature control accuracy is ±2℃.
11.1.2 Xenon arc lamp aging test chamber: a xenon arc lamp aging test chamber that
meets the requirements of GB/T 18244.
11.1.3 Punching machine and dumbbell type I cutter that meets the requirements of
GB/T 528.
11.1.4 Constant extension retainer: it can stretch the distance between marking lines by
more than 100%.
11.2 Test steps
11.2.1 Heat aging
Cut the coating film, according to the requirements in Table 2, into dumbbell type I test
pieces that meet the requirements of GB/T 528. Draw parallel marking lines at a
distance of 25mm. Stretch the distance between the marking lines of the test piece from
25mm to 50mm. Place for 24hs under standard test conditions. Then put the constant
13 Low temperature flexibility
13.1 Test apparatus
13.1.1 Low-temperature freezer: temperature control accuracy is ±2°C.
13.1.2 Round bar or bent plate: diameter is 10mm, 20mm, 30mm.
13.2 Test steps
13.2.1 Without treatment
Cut the coating film, according to the requirements in Table 2, into three (100×25)mm
test pieces for testing. Put the test piece and the bent plate or round bar into the freezing
liquid of the low temperature freezer that has been adjusted to the specified temperature.
The thermometer probe shall be at the same level as the test piece. Keep at the specified
temperature for 1h. Then the test piece is bent 180° around a round rod or a bent plate
in 3s in the freezing liquid. Bend three test pieces (without distinction between upper
and lower surfaces). Immediately take out the test pieces. Observe with the naked eye
whether there are cracks or breaks on the surface of the test piece.
13.2.2 Heat treatment
Cut the coating film, according to the requirements in Table 2, into three (100×25)mm
rectangular test pieces. Place them on the isolation material. Put them horizontally into
an electric blast oven that has reached the specified temperature. The heating
temperature for bituminous coatings is (70±2)°C. The heating temperature for other
coatings is (80±2)°C. The distance between the test piece and the box wall shall not be
less than 50mm. The test piece shall be at the same level as the probe of the thermometer.
Keep the constant temperature (168±1)h in the electric blast oven at the specified
temperature and take out. Then place under standard test conditions for 4h. Test
according to 13.2.1.
13.2.3 Alkali treatment
At (23±2)°C, in 0.1% chemically pure NaOH solution, add Ca(OH)2 reagent, and reach
supersaturated state.
Put three (100×25)mm test pieces cut according to Table 2 into 400mL of this solution.
The liquid level shall be more than 10mm above the surface of the test piece. After
continuous soaking (168±1)h, take out. Rinse well with water. Wipe dry. Place under
standard test conditions for 4h. Test according to 13.2.1.
For water-based coating, soak, take out and wipe dry. Then place it in an electric blast
oven at (60±2)°C for 6h±15min. Take it out and place it under standard test conditions
for (18±2)h. Test according to 13.2.1.
13.2.4 Acid treatment
At (23±2)°C, in 400mL of 2% chemically pure H2SO4 solution, put in three
(100×25)mm test pieces cut according to Table 2. The liquid level shall be more than
10mm above the surface of the test piece. After continuous soaking (168±1)h, take out.
Rinse well with water. Wipe dry. Place under standard test conditions for 4h. Test
according to 13.2.1.
For water-based coating, soak, take out and wipe dry. Then place it in an electric blast
oven at (60±2)℃ for 6h±15min. Take it out and place it under standard test conditions
for (18±2)h. Test according to 13.2.1.
13.2.5 UV treatment
Place three (100×25)mm 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)℃. Carry out constant temperature irradiation for
240h. Take out and place under standard test conditions for 4h. Test according to 13.2.1.
13.2.6 Artificial weathering treatment
Put three (100×25)mm test pieces cut according to Table 2 in a xenon arc lamp aging
test chamber that meets the requirements of GB/T 18244. After the cumulative
irradiation energy of the test is 1500 MJ2/m2 (about 720h), take out. Wipe dry. Place
under standard test conditions for 4h. Test according to 13.2.1.
For water-based coating, soak, take out and wipe dry. Then place in an electric blast
oven at (60±2)°C for 6h±15min. Take out and place under standard test conditions for
(18±2)h. Test according to 13.2.1.
13.3 Evaluation of results
All test pieces shall be free of cracks.
13.4 Test report
The test report shall contain the following information:
a) Chapter numbers of this Standard;
b) Determination of all necessary details of the test product;
c) Information about preparation of test piece;
d) Test temperature and rod diameter;
e) Test results;
1 - Measurement point;
2 - Test piece.
Figure 9 -- Schematic diagram of bender
The test report shall contain the following information:
a) Chapter numbers of this Standard;
b) Determination of all necessary details of the test product;
c) Information about preparation of test piece;
d) Test treatment conditions;
e) Test temperature;
f) Test results;
g) Differences in methods used or abnormalities encountered during the test;
h) Test date.
15 Impermeability
15.1 Test apparatus
15.1.1 Impermeable meter: meet the requirements in 5.2 of GB/T 328.10-2007.
15.1.2 Metal mesh: the hole diameter is 0.2mm.
15.2 Test steps
Place three (150×150)mm test pieces cut according to Table 2 for 2h under standard test
conditions. The test is carried out at (23±5)°C. Fill the device with water until it is full.
Thoroughly remove air from the device.
Place the test piece on the water-permeable tray. Then add a metal mesh of the same
size on the test piece. Cover with a 7-well disc. Clamp slowly until the test piece is
clamped on the disc. Dry the non-facing surface of the test piece with a cloth or
compressed air. Slowly increase the pressure to the specified pressure.
After reaching the specified pressure, keep the pressure for (30±2)min. During the test,
observe the water permeability of the test piece (sudden drop in water pressure or water
on the non-water facing surface of the test piece).
15.3 Evaluation of results
All test pieces shall be free from water penetration within the specified time.
15.4 Test report
The test report shall contain the following information:
a) Chapter numbers of this Standard;
b) Determination of all necessary details of the test product;
c) Information about preparation of test piece;
d) Test pressure;
e) Test results;
f) Differences in methods used or abnormalities encountered during the test;
g) Test date.
16 Drying time
16.1 Test apparatus
16.1.1 Timer: the division is at least 1min.
16.1.2 Aluminum plate: specification is [120×50×(1~3)]mm.
16.1.3 Wire bar coater: 200μm.
16.2 Test steps
16.2.1 Surface drying time
Before the test, the aluminum plate, tools and coatings shall be placed under the
standard test conditions for more than 24h.
Under standard test conditions, use a wire bar coater to coat the sample mixed and
stirred according to the manufacturer's requirements on an aluminum plate to prepare a
coating film. The coating area is (100×50)mm. Record the coating end time. For multi-
component coatings record the time from mixing.
After standing for a while, wipe your fingers with absolute ethanol. Lightly touch the
surface of the coating film with your finger within a range not less than 10mm from the
edge of the test piece. If no coating adheres to the finger, it shall be dry. Record the time.
The time from the start to the end of the test is the surface drying time.
16.2.2 Actual dying time
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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