The polymer cement waterproof coating (also known as JS composite waterproof coating) has been put into operation since 1995 and has so far produced more than 20 provinces and cities, nearly 100 production enterprises, with an annual production capacity of about 50,000 tons, and the actual output in 2000 was about 12,000. t, has been widely used in domestic roof, basement, toilet and bathroom, wall and so on thousands of items waterproof construction engineering, construction area of ​​about 400 million m2. the waterproof coating after several years of engineering practice test, the construction sector reflect the good technical performance, waterproof the effect is more prominent, for which the Ministry of construction has been incorporated into the "residential construction recommended products catalog waterproof material." but so far the only product enterprise standard or local regulations, there is no uniform industry standard, factory level standard test methods and techniques The indicators are not uniform and have a direct impact on product performance improvement and promotion.
In order to promote the further development of JS composite waterproof coatings and strengthen the quality control of products, in November 1999, the National Building Materials Bureau issued a plan for the preparation of an industrial standard for "polymer cement waterproof coating", which was designed and constructed by Henan Building Material Research Institute and Beijing Jintang Construction. Waterproofing Technology Development Co., Ltd. is responsible for drafting. This standard was approved by the National Lightweight and Decorative Building Materials Standard Committee in Beijing in April 2001. It will soon be promulgated and implemented.
The implementation of this standard will play an important role in improving the quality of the product, regulating the market, guiding the design and construction, and expanding the application.
1 Basis and principle of standard setting
1.1 Actively adopt international standards and foreign advanced standards to improve the scientific and comparability of standards.
After searching and checking, international standards and major advanced national standards do not have product standards for polymer cement waterproof coatings. Therefore, the main test method of this standard refers to the Japanese JISA6021 "Waterproof coating for roofing" standard. Test items and technical indicators Most of them refer to the performance indicators of Japan's JISA6021 and South Korea's "Polyurethane Cement-Incorporated Waterproof Materials (Standard Proposal)" and Singapore's "Cement-Based Waterproof Membrane" standard technical specifications. The specific items referred to in the "Technical Description" chapter Explained.
1.2 Seek truth from facts, in line with national conditions, so that the standard has a strong practicality.
In the preparation of this standard, the needs of the production, construction, and use departments were comprehensively considered, and the needs of the different application areas of the above-ground and underground waterproofing projects were considered. The test items and technical indexes set on the one hand were in accordance with GB50207 "Technical Specifications for Roof Engineering" and the newly revised " The national standard for waterproofing of underground works is coordinated with other national standards, and the consistency with other waterproof material (including waterproof coating) standards has also been considered, making it more practical.
The standards formulated in 1.3 should be both advanced and consider the actual conditions of the company to make it operational.
This standards, on the one hand the use of standardized reference data of similar foreign products, while taking into account the actual conditions and the level of domestic production enterprises, and fully reflects the performance and features JS paint. Technical indicators established temper justice done moderately , Scientific and reasonable, the selected test methods are advanced and applicable, commensurate with simplicity and operability.
1.4 This standard is used to test and evaluate the quality of materials, is intended to determine the minimum performance of the product, the relevant construction technology and application procedures do not fall within the scope of this material standard.
2 The main content and description of the standard
2.1 Product Classification and Application
This standard is mainly divided into type I and type II according to the product use and the raw materials and properties used. Type I is a high poly-ash ratio product with a large amount of polymer emulsion and a small amount of cement, characterized by a large elongation at break, pulling Low tensile strength and bond strength, can withstand large base layer cracks and distortions. Mainly applicable to construction waterproofing projects in non-long-term flooding environment, such as roof, wall and other parts. Type II is more cement consumption, polymer emulsion dosage Less oligomeric ash than the product. Features high tensile strength and bond strength, mainly for long-term flooding environment under construction waterproofing, toilets, baths, basements and other parts.
2.2 Determination of test items and test methods
2.2.1 Determination of test items
This standard has set up a total of 8 test items, including the determination of the solid content and the drying time before the coating is cured, the tensile strength of the coating film body, the elongation at break and the determination of the retention rate and elongation after heat, alkali and UV treatment. , And moisture base surface bond strength, low temperature flexibility, impermeability and impermeability measurement.
The above items are determined by referring to foreign standards and combining domestic engineering application requirements with the current status of the company. Most of the listed items are selected by the majority of domestic enterprises, and are also the local standards for the waterproof material certification of Beijing Municipality and the waterproof engineering specification of Guangdong Province. Listed. Test items related to drying time, tensile strength (including heat, alkali, UV treatment conditions) and elongation at break (including heat, alkali, UV treatment conditions), and water impermeability, bond strength, etc. in Japan There are similar projects in the standardization data of South Korea, Singapore and Singapore.
In order to meet the needs of underground engineering, the impermeability test has been specially established. The technical requirements selected by this standard have a certain degree of universality, which can characterize the waterproof and construction performance of the product. At the same time, it also takes into account the special requirements of underground engineering.
2.2.2 Determination of test methods
The test method of this standard mainly adopts the current national standard GB/T16777-1977 "Test Method for Building Waterproof Coatings". Most of the test methods of this standard refer to Japanese Standard JISA6021 "Waterproof Coating for Roofing". This standard also refers to the newly revised JISA6021, The tensile strength immediately after treatment is expressed as the retention rate, and the elongation at break is expressed as the actual measured value. The drying treatment method used when preparing the coated film test piece is also performed in accordance with the provisions of JISA6021.
Coating impermeability test method primarily with reference JC474-92 (96) permeable pressure "mortar, concrete waterproofing agent" in a predetermined ratio of the relevant test, taking into account the required characteristics of the polymer cement waterproof coating environment and long-term immersion, the present The standard makes appropriate additions and changes to the sample preparation procedures, maintenance methods and expression of test results. For example: 1) The reference sample is cancelled and the permeability test is performed directly on a 0.3-0.4 MPa pressure-permeable mortar specimen. 2) For the purpose of observing the bonding effect of the coating film on the moist base surface under the impermeability condition, this standard specifies that the coating film is made on the back surface; 3) The provisions for increasing the curing conditions of the moist environment shall be added into the cement curing Box (room) for conservation; 4) Change the end point of the test to 3 test pieces with 2 water penetrations or stop the test.
Moisture bond strength test method is mainly based on GB/T16777 Chapter 6 standard test conditions under the conditions of bond strength, in order to apply in a humid environment, made some changes to the above methods, namely: 1) half "8 "mortar block-shaped coating film before immersion shall 24h, to ensure saturated water absorption state in the mortar block; 2) to simulate wet environmental conditions using a standard cement curing box (chamber) as the curing conditions; 3) by the electric bending test machine modified With a tensile testing machine, the pulling speed of 50mm/min is equivalent to the bending speed of 10N/s. 4) The calculation method of the test result is added.
In order to promote the further development of JS composite waterproof coatings and strengthen the quality control of products, in November 1999, the National Building Materials Bureau issued a plan for the preparation of an industrial standard for "polymer cement waterproof coating", which was designed and constructed by Henan Building Material Research Institute and Beijing Jintang Construction. Waterproofing Technology Development Co., Ltd. is responsible for drafting. This standard was approved by the National Lightweight and Decorative Building Materials Standard Committee in Beijing in April 2001. It will soon be promulgated and implemented.
The implementation of this standard will play an important role in improving the quality of the product, regulating the market, guiding the design and construction, and expanding the application.
1 Basis and principle of standard setting
1.1 Actively adopt international standards and foreign advanced standards to improve the scientific and comparability of standards.
After searching and checking, international standards and major advanced national standards do not have product standards for polymer cement waterproof coatings. Therefore, the main test method of this standard refers to the Japanese JISA6021 "Waterproof coating for roofing" standard. Test items and technical indicators Most of them refer to the performance indicators of Japan's JISA6021 and South Korea's "Polyurethane Cement-Incorporated Waterproof Materials (Standard Proposal)" and Singapore's "Cement-Based Waterproof Membrane" standard technical specifications. The specific items referred to in the "Technical Description" chapter Explained.
1.2 Seek truth from facts, in line with national conditions, so that the standard has a strong practicality.
In the preparation of this standard, the needs of the production, construction, and use departments were comprehensively considered, and the needs of the different application areas of the above-ground and underground waterproofing projects were considered. The test items and technical indexes set on the one hand were in accordance with GB50207 "Technical Specifications for Roof Engineering" and the newly revised " The national standard for waterproofing of underground works is coordinated with other national standards, and the consistency with other waterproof material (including waterproof coating) standards has also been considered, making it more practical.
The standards formulated in 1.3 should be both advanced and consider the actual conditions of the company to make it operational.
This standards, on the one hand the use of standardized reference data of similar foreign products, while taking into account the actual conditions and the level of domestic production enterprises, and fully reflects the performance and features JS paint. Technical indicators established temper justice done moderately , Scientific and reasonable, the selected test methods are advanced and applicable, commensurate with simplicity and operability.
1.4 This standard is used to test and evaluate the quality of materials, is intended to determine the minimum performance of the product, the relevant construction technology and application procedures do not fall within the scope of this material standard.
2 The main content and description of the standard
2.1 Product Classification and Application
This standard is mainly divided into type I and type II according to the product use and the raw materials and properties used. Type I is a high poly-ash ratio product with a large amount of polymer emulsion and a small amount of cement, characterized by a large elongation at break, pulling Low tensile strength and bond strength, can withstand large base layer cracks and distortions. Mainly applicable to construction waterproofing projects in non-long-term flooding environment, such as roof, wall and other parts. Type II is more cement consumption, polymer emulsion dosage Less oligomeric ash than the product. Features high tensile strength and bond strength, mainly for long-term flooding environment under construction waterproofing, toilets, baths, basements and other parts.
2.2 Determination of test items and test methods
2.2.1 Determination of test items
This standard has set up a total of 8 test items, including the determination of the solid content and the drying time before the coating is cured, the tensile strength of the coating film body, the elongation at break and the determination of the retention rate and elongation after heat, alkali and UV treatment. , And moisture base surface bond strength, low temperature flexibility, impermeability and impermeability measurement.
The above items are determined by referring to foreign standards and combining domestic engineering application requirements with the current status of the company. Most of the listed items are selected by the majority of domestic enterprises, and are also the local standards for the waterproof material certification of Beijing Municipality and the waterproof engineering specification of Guangdong Province. Listed. Test items related to drying time, tensile strength (including heat, alkali, UV treatment conditions) and elongation at break (including heat, alkali, UV treatment conditions), and water impermeability, bond strength, etc. in Japan There are similar projects in the standardization data of South Korea, Singapore and Singapore.
In order to meet the needs of underground engineering, the impermeability test has been specially established. The technical requirements selected by this standard have a certain degree of universality, which can characterize the waterproof and construction performance of the product. At the same time, it also takes into account the special requirements of underground engineering.
2.2.2 Determination of test methods
The test method of this standard mainly adopts the current national standard GB/T16777-1977 "Test Method for Building Waterproof Coatings". Most of the test methods of this standard refer to Japanese Standard JISA6021 "Waterproof Coating for Roofing". This standard also refers to the newly revised JISA6021, The tensile strength immediately after treatment is expressed as the retention rate, and the elongation at break is expressed as the actual measured value. The drying treatment method used when preparing the coated film test piece is also performed in accordance with the provisions of JISA6021.
Coating impermeability test method primarily with reference JC474-92 (96) permeable pressure "mortar, concrete waterproofing agent" in a predetermined ratio of the relevant test, taking into account the required characteristics of the polymer cement waterproof coating environment and long-term immersion, the present The standard makes appropriate additions and changes to the sample preparation procedures, maintenance methods and expression of test results. For example: 1) The reference sample is cancelled and the permeability test is performed directly on a 0.3-0.4 MPa pressure-permeable mortar specimen. 2) For the purpose of observing the bonding effect of the coating film on the moist base surface under the impermeability condition, this standard specifies that the coating film is made on the back surface; 3) The provisions for increasing the curing conditions of the moist environment shall be added into the cement curing Box (room) for conservation; 4) Change the end point of the test to 3 test pieces with 2 water penetrations or stop the test.
Moisture bond strength test method is mainly based on GB/T16777 Chapter 6 standard test conditions under the conditions of bond strength, in order to apply in a humid environment, made some changes to the above methods, namely: 1) half "8 "mortar block-shaped coating film before immersion shall 24h, to ensure saturated water absorption state in the mortar block; 2) to simulate wet environmental conditions using a standard cement curing box (chamber) as the curing conditions; 3) by the electric bending test machine modified With a tensile testing machine, the pulling speed of 50mm/min is equivalent to the bending speed of 10N/s. 4) The calculation method of the test result is added.
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