GB/T 41078-2021 English PDF (GBT41078-2021)

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GB/T 41078-2021: Test methods for harmful substances in building waterproofing materials
GB/T 41078-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.30
CCS Q 17
Test Methods for Harmful Substances in Building
Waterproofing Materials
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Classification and Test Items of Harmful Substances ... 7
5 Test Method ... 9
6 Test Report ... 13
Appendix A (Informative) Products and Names Corresponding to the Classification of
Waterproof Materials ... 15
Appendix B (Normative) Determination of Ammonia Content - Post-Distillation
Titration ... 17
Test Methods for Harmful Substances in Building
Waterproofing Materials
Warning - This Document does not point out all possible safety issues, the user is
responsible for taking appropriate safety and health measures and ensuring compliance
with the relevant regulations.
1 Scope
This Document specifies the classification and the test items of harmful substances, test
methods and test reports of test methods for harmful substances in building waterproofing
materials.
This Document applies to construction waterproofing sheets, waterproofing coatings and other
waterproofing materials.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 328.4-2007 Test Methods for Building Sheets for Waterproofing - Part 4: Bitumen
Sheets for Waterproofing - Thickness and Mass per Unit Area
GB/T 1725 Paints Varnishes and Plastics - Determination of Non-Volatile-Matter Content
GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 6750 Paints and Varnishes - Determination of Density - Pycnometer Method
GB/T 8928-2008 Standard Test Method for Density of Semi-Solid and Solid Asphalt
GB/T 18446 Binders for Paints and Varnishes - Determination of Monomeric
Diisocyanates in Isocyanate Resins
GB 18582-2020 Limit of Harmful Substances of Architectural Wall Coatings
GB/T 23985-2009 Paints and Varnishes - Determination of Volatile Organic Compound
(VOC) Content - Difference Method
it is a sheet-like waterproof material that is processed by calendering or extrusion molding with
rubber as the main base material, adding fillers, plasticizers, vulcanizing agents, antioxidants,
stabilizers and other additives.
NOTE: There may be structures such as reinforcing materials, backing materials and surface bonding
materials, etc.
3.4 Water-borne waterproof coating
It is a waterproof material that uses water as the dispersion medium, and the water volatilizes
and solidifies into a film.
NOTE: Including single-liquid type, double-liquid type, liquid-powder type.
3.5 Reactive waterproof coating
A waterproof material that reacts and cures with moisture in the air or cures to form a film by
reaction between product components.
NOTE 1: Including single-component type and multi-component type.
NOTE 2: The solid content of reactive waterproof coatings is generally no less than 85%.
3.6 Solvent-borne waterproof coating
A waterproof material that is cured into a film by solvent evaporation or by reaction.
NOTE: The solid content of solvent-based waterproof coatings is generally less than 85%.
3.7 Hot melt waterproof coating
The waterproof materials of single-component type, solid or viscous body at room temperature,
heating and melting for construction.
NOTE: The solid content of hot melt waterproof coatings is generally no less than 98%.
3.8 Dry powder waterproof material
The product is a dry powder, a waterproof material that is used after adding water and mixing
evenly.
3.9 Target volatile organic compounds
Single volatile organic compound that is selected and analyzed in the product.
NOTE: It can be formaldehyde, benzene, toluene, o-xylene, m-xylene, p-xylene, styrene, ethylbenzene,
n-butyl acetate, n-undecane and n-tetradecane, etc.
[Source: JG/T 528-2017, 3.3, with modifications]
Mi – mass fraction of component i.
5.2.3 The reactive waterproof coating and solvent-borne waterproof coating shall be tested
according to the provisions of GB/T 23985-2009; and the results shall be calculated according
to 8.3 of GB/T 23985-2009. The non-volatile matter content is tested according to the
provisions of GB/T 1725. The sample is mixed uniformly according to the proportion and
weighs about 1 g of the sample. The high-temperature treatment test condition keeps the
constant temperature at (105±2) ℃ for 1 h; thereof, after the specimen preparation and
sampling weighing of the non-volatile matter content of the reactive waterproof coating, then
take the high temperature treatment after standing for 24h under the conditions of (23±2) ℃
and relative humidity of (50±5) %. The density shall be tested according to the provisions of
GB/T 6750. Moisture is not measured, and the moisture content is set to zero. The fast-curing
reactive waterproof coatings are tested for each component separately, and the results are
calculated according to the Formula (1) in combination with the ratio.
5.2.4 The hot melt coating shall be tested according to the provisions of GB/T 23985-2009, and
the results shall be calculated according to 8.3 of GB/T 23985-2009. The non-volatile matter
content is tested according to the provisions of GB/T 1725. Take about 1 g of the specimen, and
the high temperature treatment test condition is that keep constant temperature at (130±2) ℃
for 3h. The density shall be tested at 23°C according to the requirements for semi-solid
petroleum asphalt specified in GB/T 8928-2008. Moisture is not measured, and the moisture
content is set to zero.
5.2.5 The dry powder waterproof material shall be tested according to the putty method in 6.2.1
of GB 18582-2020; only the powder shall be tested, and it shall be taken as the test result.
5.3 Content of benzene series
5.3.1 The water-borne waterproof coating shall be tested according to the provisions of Method-
B in GB/T 23990-2009; and the results shall be calculated according to Formula (1) in
combination with the ratio. The double-liquid fast-curing waterproof coating (rubber asphalt,
water-borne non-curing) is only tested for the main component, which is the test result.
5.3.2 The reactive, solvent-borne and hot melt coatings shall be tested according to the
provisions of Method-A in GB/T 23990-2009; and the results shall be calculated according to
Formula (1) in combination with the ratio.
5.3.3 The dry powder waterproof material shall be tested according to the provisions of Method-
B in GB/T 23990-2009; only the powder shall be tested, which shall be taken as the test result.
5.4 Total content of glycol ethers and their ether esters
The total content of glycol ethers and their ether esters (ethylene glycol methyl ether, ethylene
glycol methyl ether acetate, glycol ether, ethylene glycol monoethyl ether acetate,
dimethoxyethane, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene
glycol monomethyl ether) shall be tested according to the provisions of GB/T 23986-2009; and
calculated acco...